Rename CorrelationContext with Baggage (#1691)

* Rename CorrelationContext with Baggage

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

* Fix review comments

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

* Rename contextBuildet to baggageBuilder

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

all/build.gradle

@@ -21,8 +21,8 @@ def subprojects = [
         project(':opentelemetry-integration-tests'),
         project(':opentelemetry-integration-tests-tracecontext'),
         project(':opentelemetry-opentracing-shim'),
+        project(':opentelemetry-sdk-baggage'),
         project(':opentelemetry-sdk-common'),
-        project(':opentelemetry-sdk-correlation-context'),
         project(':opentelemetry-sdk-metrics'),
         project(':opentelemetry-sdk-tracing'),
         project(':opentelemetry-sdk'),

api/src/main/java/io/opentelemetry/OpenTelemetry.java

@@ -16,11 +16,11 @@
 
 package io.opentelemetry;
 
+import io.opentelemetry.baggage.BaggageManager;
+import io.opentelemetry.baggage.DefaultBaggageManager;
+import io.opentelemetry.baggage.spi.BaggageManagerFactory;
 import io.opentelemetry.context.propagation.ContextPropagators;
 import io.opentelemetry.context.propagation.DefaultContextPropagators;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
-import io.opentelemetry.correlationcontext.DefaultCorrelationContextManager;
-import io.opentelemetry.correlationcontext.spi.CorrelationContextManagerFactory;
 import io.opentelemetry.internal.Obfuscated;
 import io.opentelemetry.internal.Utils;
 import io.opentelemetry.metrics.DefaultMeterProvider;
@@ -38,13 +38,13 @@ import javax.annotation.concurrent.ThreadSafe;
 
 /**
  * This class provides a static global accessor for telemetry objects {@link Tracer}, {@link Meter}
- * and {@link CorrelationContextManager}.
+ * and {@link BaggageManager}.
  *
  * <p>The telemetry objects are lazy-loaded singletons resolved via {@link ServiceLoader} mechanism.
  *
  * @see TracerProvider
  * @see MeterProviderFactory
- * @see CorrelationContextManagerFactory
+ * @see BaggageManagerFactory
  */
 @ThreadSafe
 public final class OpenTelemetry {
@@ -54,7 +54,7 @@ public final class OpenTelemetry {
 
   private final TracerProvider tracerProvider;
   private final MeterProvider meterProvider;
-  private final CorrelationContextManager contextManager;
+  private final BaggageManager contextManager;
 
   private volatile ContextPropagators propagators = DefaultContextPropagators.builder().build();
 
@@ -144,15 +144,14 @@ public final class OpenTelemetry {
   }
 
   /**
-   * Returns a singleton {@link CorrelationContextManager}.
+   * Returns a singleton {@link BaggageManager}.
    *
-   * @return registered manager or default via {@link
+   * @return registered manager or default via {@link DefaultBaggageManager#getInstance()}.
-   *     DefaultCorrelationContextManager#getInstance()}.
    * @throws IllegalStateException if a specified manager (via system properties) could not be
    *     found.
    * @since 0.1.0
    */
-  public static CorrelationContextManager getCorrelationContextManager() {
+  public static BaggageManager getBaggageManager() {
     return getInstance().contextManager;
   }
 
@@ -209,12 +208,11 @@ public final class OpenTelemetry {
         meterProviderFactory != null
             ? meterProviderFactory.create()
             : DefaultMeterProvider.getInstance();
-    CorrelationContextManagerFactory contextManagerProvider =
+    BaggageManagerFactory contextManagerProvider = loadSpi(BaggageManagerFactory.class);
-        loadSpi(CorrelationContextManagerFactory.class);
     contextManager =
         contextManagerProvider != null
             ? contextManagerProvider.create()
-            : DefaultCorrelationContextManager.getInstance();
+            : DefaultBaggageManager.getInstance();
   }
 
   /**

api/src/main/java/io/opentelemetry/baggage/Baggage.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import io.grpc.Context;
 import java.util.Collection;
@@ -25,19 +25,19 @@ import javax.annotation.concurrent.Immutable;
  * A map from {@link String} to {@link String} and {@link EntryMetadata} that can be used to label
  * anything that is associated with a specific operation.
  *
- * <p>For example, {@code CorrelationContext}s can be used to label stats, log messages, or
+ * <p>For example, {@code Baggage}s can be used to label stats, log messages, or debugging
- * debugging information.
+ * information.
  *
- * @since 0.1.0
+ * @since 0.9.0
  */
 @Immutable
-public interface CorrelationContext {
+public interface Baggage {
   /**
-   * Returns an immutable collection of the entries in this {@code CorrelationContext}. Order of
+   * Returns an immutable collection of the entries in this {@code Baggage}. Order of entries is not
-   * entries is not guaranteed.
+   * guaranteed.
    *
-   * @return an immutable collection of the entries in this {@code CorrelationContext}.
+   * @return an immutable collection of the entries in this {@code Baggage}.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   Collection<Entry> getEntries();
 
@@ -46,47 +46,45 @@ public interface CorrelationContext {
    *
    * @param entryKey entry key to return the value for.
    * @return the value associated with the given key, or {@code null} if no {@code Entry} with the
-   *     given {@code entryKey} is in this {@code CorrelationContext}.
+   *     given {@code entryKey} is in this {@code Baggage}.
    */
   @Nullable
   String getEntryValue(String entryKey);
 
   /**
-   * Builder for the {@link CorrelationContext} class.
+   * Builder for the {@link Baggage} class.
    *
-   * @since 0.1.0
+   * @since 0.9.0
    */
   interface Builder {
     /**
-     * Sets the parent {@link CorrelationContext} to use. If no parent is provided, the value of
+     * Sets the parent {@link Baggage} to use. If no parent is provided, the value of {@link
-     * {@link CorrelationContextManager#getCurrentContext()} at {@link #build()} time will be used
+     * BaggageManager#getCurrentBaggage()} at {@link #build()} time will be used as parent, unless
-     * as parent, unless {@link #setNoParent()} was called.
+     * {@link #setNoParent()} was called.
      *
-     * <p>This <b>must</b> be used to create a {@link CorrelationContext} when manual Context
+     * <p>This <b>must</b> be used to create a {@link Baggage} when manual Context propagation is
-     * propagation is used.
+     * used.
      *
      * <p>If called multiple times, only the last specified value will be used.
      *
-     * @param parent the {@link CorrelationContext} used as parent, not null.
+     * @param parent the {@link Baggage} used as parent, not null.
      * @return this.
      * @throws NullPointerException if {@code parent} is {@code null}.
      * @see #setNoParent()
-     * @since 0.1.0
+     * @since 0.9.0
      */
-    Builder setParent(CorrelationContext parent);
+    Builder setParent(Baggage parent);
 
     /**
-     * Sets the parent {@link CorrelationContext} to use from the specified {@code Context}. If no
+     * Sets the parent {@link Baggage} to use from the specified {@code Context}. If no parent
-     * parent {@link CorrelationContext} is provided, the value of {@link
+     * {@link Baggage} is provided, the value of {@link BaggageManager#getCurrentBaggage()} at
-     * CorrelationContextManager#getCurrentContext()} at {@link #build()} time will be used as
+     * {@link #build()} time will be used as parent, unless {@link #setNoParent()} was called.
-     * parent, unless {@link #setNoParent()} was called.
      *
-     * <p>If no parent {@link CorrelationContext} is available in the specified {@code Context}, the
+     * <p>If no parent {@link Baggage} is available in the specified {@code Context}, the resulting
-     * resulting {@link CorrelationContext} will become a root instance, as if {@link
+     * {@link Baggage} will become a root instance, as if {@link #setNoParent()} had been called.
-     * #setNoParent()} had been called.
      *
-     * <p>This <b>must</b> be used to create a {@link CorrelationContext} when manual Context
+     * <p>This <b>must</b> be used to create a {@link Baggage} when manual Context propagation is
-     * propagation is used.
+     * used.
      *
      * <p>If called multiple times, only the last specified value will be used.
      *
@@ -94,18 +92,17 @@ public interface CorrelationContext {
      * @return this.
      * @throws NullPointerException if {@code context} is {@code null}.
      * @see #setNoParent()
-     * @since 0.7.0
+     * @since 0.9.0
      */
     Builder setParent(Context context);
 
     /**
-     * Sets the option to become a root {@link CorrelationContext} with no parent. If <b>not</b>
+     * Sets the option to become a root {@link Baggage} with no parent. If <b>not</b> called, the
-     * called, the value provided using {@link #setParent(CorrelationContext)} or otherwise {@link
+     * value provided using {@link #setParent(Baggage)} or otherwise {@link
-     * CorrelationContextManager#getCurrentContext()} at {@link #build()} time will be used as
+     * BaggageManager#getCurrentBaggage()} at {@link #build()} time will be used as parent.
-     * parent.
      *
      * @return this.
-     * @since 0.1.0
+     * @since 0.9.0
      */
     Builder setNoParent();
 
@@ -116,7 +113,7 @@ public interface CorrelationContext {
      * @param value the {@code String} value to set for the given key.
      * @param entryMetadata the {@code EntryMetadata} associated with this {@link Entry}.
      * @return this
-     * @since 0.1.0
+     * @since 0.9.0
      */
     Builder put(String key, String value, EntryMetadata entryMetadata);
 
@@ -125,16 +122,16 @@ public interface CorrelationContext {
      *
      * @param key the {@code String} key which will be removed.
      * @return this
-     * @since 0.1.0
+     * @since 0.9.0
      */
     Builder remove(String key);
 
     /**
-     * Creates a {@code CorrelationContext} from this builder.
+     * Creates a {@code Baggage} from this builder.
      *
-     * @return a {@code CorrelationContext} with the same entries as this builder.
+     * @return a {@code Baggage} with the same entries as this builder.
-     * @since 0.1.0
+     * @since 0.9.0
      */
-    CorrelationContext build();
+    Baggage build();
   }
 }

api/src/main/java/io/opentelemetry/baggage/BaggageManager.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.opentelemetry.baggage;
+
+import io.opentelemetry.context.Scope;
+import javax.annotation.concurrent.ThreadSafe;
+
+/**
+ * Object for creating new {@link Baggage}s and {@code Baggage}s based on the current context.
+ *
+ * <p>This class returns {@link Baggage.Builder builders} that can be used to create the
+ * implementation-dependent {@link Baggage}s.
+ *
+ * <p>Implementations may have different constraints and are free to convert entry contexts to their
+ * own subtypes. This means callers cannot assume the {@link #getCurrentBaggage() current context}
+ * is the same instance as the one {@link #withContext(Baggage) placed into scope}.
+ *
+ * @since 0.9.0
+ */
+@ThreadSafe
+public interface BaggageManager {
+
+  /**
+   * Returns the current {@code Baggage}.
+   *
+   * @return the current {@code Baggage}.
+   * @since 0.9.0
+   */
+  Baggage getCurrentBaggage();
+
+  /**
+   * Returns a new {@link Baggage.Builder}.
+   *
+   * @return a new {@code Baggage.Builder}.
+   * @since 0.9.0
+   */
+  Baggage.Builder baggageBuilder();
+
+  /**
+   * Enters the scope of code where the given {@code Baggage} is in the current context (replacing
+   * the previous {@code Baggage}) and returns an object that represents that scope. The scope is
+   * exited when the returned object is closed.
+   *
+   * @param distContext the {@code Baggage} to be set as the current context.
+   * @return an object that defines a scope where the given {@code Baggage} is set as the current
+   *     context.
+   * @since 0.9.0
+   */
+  Scope withContext(Baggage distContext);
+}

api/src/main/java/io/opentelemetry/baggage/BaggageUtils.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.opentelemetry.baggage;
+
+import io.grpc.Context;
+import io.opentelemetry.context.ContextUtils;
+import io.opentelemetry.context.Scope;
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.Immutable;
+
+/**
+ * Utility methods for accessing the {@link Baggage} contained in the {@link io.grpc.Context}.
+ *
+ * @since 0.9.0
+ */
+@Immutable
+public final class BaggageUtils {
+  private static final Context.Key<Baggage> CORR_CONTEXT_KEY =
+      Context.key("opentelemetry-corr-context-key");
+
+  /**
+   * Creates a new {@code Context} with the given value set.
+   *
+   * @param baggage the value to be set.
+   * @param context the parent {@code Context}.
+   * @return a new context with the given value set.
+   * @since 0.9.0
+   */
+  public static Context withBaggage(Baggage baggage, Context context) {
+    return context.withValue(CORR_CONTEXT_KEY, baggage);
+  }
+
+  /**
+   * Returns the {@link Baggage} from the {@linkplain Context#current current context}, falling back
+   * to an empty {@link Baggage}.
+   *
+   * @return the {@link Baggage} from the {@linkplain Context#current current context}.
+   * @since 0.9.0
+   */
+  public static Baggage getCurrentBaggage() {
+    return getBaggage(Context.current());
+  }
+
+  /**
+   * Returns the {@link Baggage} from the specified {@code Context}, falling back to an empty {@link
+   * Baggage}.
+   *
+   * @param context the specified {@code Context}.
+   * @return the {@link Baggage} from the specified {@code Context}.
+   * @since 0.9.0
+   */
+  public static Baggage getBaggage(Context context) {
+    Baggage baggage = CORR_CONTEXT_KEY.get(context);
+    return baggage == null ? EmptyBaggage.getInstance() : baggage;
+  }
+
+  /**
+   * Returns the {@link Baggage} from the specified {@code Context}. If none is found, this method
+   * returns {code null}.
+   *
+   * @param context the specified {@code Context}.
+   * @return the {@link Baggage} from the specified {@code Context}.
+   * @since 0.9.0
+   */
+  @Nullable
+  public static Baggage getBaggageWithoutDefault(Context context) {
+    return CORR_CONTEXT_KEY.get(context);
+  }
+
+  /**
+   * Returns a new {@link Scope} encapsulating the provided {@link Baggage} added to the current
+   * {@code Context}.
+   *
+   * @param baggage the {@link Baggage} to be added to the current {@code Context}.
+   * @return the {@link Scope} for the updated {@code Context}.
+   * @since 0.9.0
+   */
+  public static Scope currentContextWith(Baggage baggage) {
+    Context context = withBaggage(baggage, Context.current());
+    return ContextUtils.withScopedContext(context);
+  }
+
+  private BaggageUtils() {}
+}

api/src/main/java/io/opentelemetry/baggage/DefaultBaggageManager.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.opentelemetry.baggage;
+
+import io.grpc.Context;
+import io.opentelemetry.context.Scope;
+import io.opentelemetry.internal.Utils;
+import javax.annotation.concurrent.Immutable;
+import javax.annotation.concurrent.ThreadSafe;
+
+/**
+ * No-op implementations of {@link BaggageManager}.
+ *
+ * @since 0.9.0
+ */
+@ThreadSafe
+public final class DefaultBaggageManager implements BaggageManager {
+  private static final DefaultBaggageManager INSTANCE = new DefaultBaggageManager();
+
+  /**
+   * Returns a {@code BaggageManager} singleton that is the default implementation for {@link
+   * BaggageManager}.
+   *
+   * @return a {@code BaggageManager} singleton that is the default implementation for {@link
+   *     BaggageManager}.
+   */
+  public static BaggageManager getInstance() {
+    return INSTANCE;
+  }
+
+  @Override
+  public Baggage getCurrentBaggage() {
+    return BaggageUtils.getCurrentBaggage();
+  }
+
+  @Override
+  public Baggage.Builder baggageBuilder() {
+    return new NoopBaggageBuilder();
+  }
+
+  @Override
+  public Scope withContext(Baggage distContext) {
+    return BaggageUtils.currentContextWith(distContext);
+  }
+
+  @Immutable
+  private static final class NoopBaggageBuilder implements Baggage.Builder {
+    @Override
+    public Baggage.Builder setParent(Baggage parent) {
+      Utils.checkNotNull(parent, "parent");
+      return this;
+    }
+
+    @Override
+    public Baggage.Builder setParent(Context context) {
+      Utils.checkNotNull(context, "context");
+      return this;
+    }
+
+    @Override
+    public Baggage.Builder setNoParent() {
+      return this;
+    }
+
+    @Override
+    public Baggage.Builder put(String key, String value, EntryMetadata entryMetadata) {
+      Utils.checkNotNull(key, "key");
+      Utils.checkNotNull(value, "value");
+      Utils.checkNotNull(entryMetadata, "entryMetadata");
+      return this;
+    }
+
+    @Override
+    public Baggage.Builder remove(String key) {
+      Utils.checkNotNull(key, "key");
+      return this;
+    }
+
+    @Override
+    public Baggage build() {
+      return EmptyBaggage.getInstance();
+    }
+  }
+}

api/src/main/java/io/opentelemetry/baggage/EmptyBaggage.java

@@ -14,29 +14,27 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import java.util.Collection;
 import java.util.Collections;
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
-/**
+/** An immutable implementation of the {@link Baggage} that does not contain any entries. */
- * An immutable implementation of the {@link CorrelationContext} that does not contain any entries.
- */
 @Immutable
-public class EmptyCorrelationContext implements CorrelationContext {
+public class EmptyBaggage implements Baggage {
   /**
-   * Returns the single instance of the {@link EmptyCorrelationContext} class.
+   * Returns the single instance of the {@link EmptyBaggage} class.
    *
-   * @return the single instance of the {@code EmptyCorrelationContext} class.
+   * @return the single instance of the {@code EmptyBaggage} class.
-   * @since 0.1.0
+   * @since 0.9.0
    */
-  public static CorrelationContext getInstance() {
+  public static Baggage getInstance() {
     return INSTANCE;
   }
 
-  private static final CorrelationContext INSTANCE = new EmptyCorrelationContext();
+  private static final Baggage INSTANCE = new EmptyBaggage();
 
   @Override
   public Collection<Entry> getEntries() {
@@ -49,5 +47,5 @@ public class EmptyCorrelationContext implements CorrelationContext {
     return null;
   }
 
-  private EmptyCorrelationContext() {}
+  private EmptyBaggage() {}
 }

api/src/main/java/io/opentelemetry/baggage/Entry.java

@@ -14,10 +14,10 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import com.google.auto.value.AutoValue;
-import io.opentelemetry.correlationcontext.EntryMetadata.EntryTtl;
+import io.opentelemetry.baggage.EntryMetadata.EntryTtl;
 import io.opentelemetry.internal.StringUtils;
 import io.opentelemetry.internal.Utils;
 import javax.annotation.concurrent.Immutable;
@@ -25,7 +25,7 @@ import javax.annotation.concurrent.Immutable;
 /**
  * String-String key-value pair, along with {@link EntryMetadata}.
  *
- * @since 0.1.0
+ * @since 0.9.0
  */
 @Immutable
 @AutoValue
@@ -33,14 +33,14 @@ public abstract class Entry {
   /**
    * The maximum length for an entry key name. The value is {@value #MAX_KEY_LENGTH}.
    *
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public static final int MAX_KEY_LENGTH = 255;
 
   /**
    * The maximum length for a entry value. The value is {@value #MAX_VALUE_LENGTH}.
    *
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public static final int MAX_VALUE_LENGTH = 255;
 
@@ -57,7 +57,7 @@ public abstract class Entry {
    * @param value the entry value.
    * @param entryMetadata the entry metadata.
    * @return a {@code Entry}.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public static Entry create(String key, String value, EntryMetadata entryMetadata) {
     Utils.checkArgument(keyIsValid(key), "Invalid entry key name: %s", key);
@@ -69,7 +69,7 @@ public abstract class Entry {
    * Returns the entry's key.
    *
    * @return the entry's key.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public abstract String getKey();
 
@@ -77,7 +77,7 @@ public abstract class Entry {
    * Returns the entry's value.
    *
    * @return the entry's value.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public abstract String getValue();
 
@@ -85,7 +85,7 @@ public abstract class Entry {
    * Returns the {@link EntryMetadata} associated with this {@link Entry}.
    *
    * @return the {@code EntryMetadata}.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public abstract EntryMetadata getEntryMetadata();
 

api/src/main/java/io/opentelemetry/baggage/EntryMetadata.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import com.google.auto.value.AutoValue;
 import javax.annotation.concurrent.Immutable;
@@ -25,7 +25,7 @@ import javax.annotation.concurrent.Immutable;
  * <p>For now only the property {@link EntryTtl} is defined. In future, additional properties may be
  * added to address specific situations.
  *
- * @since 0.1.0
+ * @since 0.9.0
  */
 @Immutable
 @AutoValue
@@ -38,7 +38,7 @@ public abstract class EntryMetadata {
    *
    * @param entryTtl TTL of an {@code Entry}.
    * @return an {@code EntryMetadata}.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public static EntryMetadata create(EntryTtl entryTtl) {
     return new AutoValue_EntryMetadata(entryTtl);
@@ -48,7 +48,7 @@ public abstract class EntryMetadata {
    * Returns the {@link EntryTtl} of this {@link EntryMetadata}.
    *
    * @return the {@code EntryTtl}.
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public abstract EntryTtl getEntryTtl();
 
@@ -63,7 +63,7 @@ public abstract class EntryMetadata {
    *
    * <p>For now, only special values of {@link EntryTtl} are supported.
    *
-   * @since 0.1.0
+   * @since 0.9.0
    */
   public enum EntryTtl {
 
@@ -71,7 +71,7 @@ public abstract class EntryMetadata {
      * An {@link Entry} with {@link EntryTtl#NO_PROPAGATION} is considered to have local scope and
      * is used within the process where it's created.
      *
-     * @since 0.1.0
+     * @since 0.9.0
      */
     NO_PROPAGATION(0),
 
@@ -83,7 +83,7 @@ public abstract class EntryMetadata {
      * <p>{@link EntryTtl#UNLIMITED_PROPAGATION} is typical used to track a request, which may be
      * processed across multiple entities.
      *
-     * @since 0.1.0
+     * @since 0.9.0
      */
     UNLIMITED_PROPAGATION(-1);
 

api/src/main/java/io/opentelemetry/baggage/package-info.java

@@ -21,12 +21,11 @@
  * to label anything that is associated with a specific operation. For example, the {@code
  * opentelemetry.stats} package labels all stats with the current entries.
  *
- * <p>{@link io.opentelemetry.correlationcontext.Entry Entrys} are key-value pairs of {@link
+ * <p>{@link io.opentelemetry.baggage.Entry Entrys} are key-value pairs of {@link
- * java.lang.String}s. They are stored as a map in a {@link
+ * java.lang.String}s. They are stored as a map in a {@link io.opentelemetry.baggage.Baggage}.
- * io.opentelemetry.correlationcontext.CorrelationContext}.
  *
  * <p>Note that entries are independent of the tracing data that is propagated in the {@code
  * io.grpc.Context}, such as trace ID.
  */
 // TODO: Add code examples.
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;

api/src/main/java/io/opentelemetry/baggage/spi/BaggageManagerFactory.java

@@ -14,30 +14,29 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext.spi;
+package io.opentelemetry.baggage.spi;
 
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
+import io.opentelemetry.baggage.BaggageManager;
 import javax.annotation.concurrent.ThreadSafe;
 
 /**
- * CorrelationContextManagerFactory is a service provider for {@link CorrelationContextManager}.
+ * BaggageManagerFactory is a service provider for {@link BaggageManager}. Fully qualified class
- * Fully qualified class name of the implementation should be registered in {@code
+ * name of the implementation should be registered in {@code
- * META-INF/services/io.opentelemetry.correlationcontext.spi.CorrelationContextManagerFactory}. <br>
+ * META-INF/services/io.opentelemetry.baggage.spi.BaggageManagerFactory}. <br>
  * <br>
  * A specific implementation can be selected by a system property {@code
- * io.opentelemetry.correlationcontext.spi.CorrelationContextManagerFactory} with value of fully
+ * io.opentelemetry.baggage.spi.BaggageManagerFactory} with value of fully qualified class name.
- * qualified class name.
  *
  * @see io.opentelemetry.OpenTelemetry
  */
 @ThreadSafe
-public interface CorrelationContextManagerFactory {
+public interface BaggageManagerFactory {
 
   /**
-   * Creates a new {@code CorrelationContextManager} instance.
+   * Creates a new {@code BaggageManager} instance.
    *
-   * @return a {@code CorrelationContextManager} instance.
+   * @return a {@code BaggageManager} instance.
-   * @since 0.1.0
+   * @since 0.9.0
    */
-  CorrelationContextManager create();
+  BaggageManager create();
 }

api/src/main/java/io/opentelemetry/correlationcontext/CorrelationContextManager.java

@@ -1,65 +0,0 @@
-/*
- * Copyright 2019, OpenTelemetry Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.opentelemetry.correlationcontext;
-
-import io.opentelemetry.context.Scope;
-import javax.annotation.concurrent.ThreadSafe;
-
-/**
- * Object for creating new {@link CorrelationContext}s and {@code CorrelationContext}s based on the
- * current context.
- *
- * <p>This class returns {@link CorrelationContext.Builder builders} that can be used to create the
- * implementation-dependent {@link CorrelationContext}s.
- *
- * <p>Implementations may have different constraints and are free to convert entry contexts to their
- * own subtypes. This means callers cannot assume the {@link #getCurrentContext() current context}
- * is the same instance as the one {@link #withContext(CorrelationContext) placed into scope}.
- *
- * @since 0.1.0
- */
-@ThreadSafe
-public interface CorrelationContextManager {
-
-  /**
-   * Returns the current {@code CorrelationContext}.
-   *
-   * @return the current {@code CorrelationContext}.
-   * @since 0.1.0
-   */
-  CorrelationContext getCurrentContext();
-
-  /**
-   * Returns a new {@code Builder}.
-   *
-   * @return a new {@code Builder}.
-   * @since 0.1.0
-   */
-  CorrelationContext.Builder contextBuilder();
-
-  /**
-   * Enters the scope of code where the given {@code CorrelationContext} is in the current context
-   * (replacing the previous {@code CorrelationContext}) and returns an object that represents that
-   * scope. The scope is exited when the returned object is closed.
-   *
-   * @param distContext the {@code CorrelationContext} to be set as the current context.
-   * @return an object that defines a scope where the given {@code CorrelationContext} is set as the
-   *     current context.
-   * @since 0.1.0
-   */
-  Scope withContext(CorrelationContext distContext);
-}

api/src/main/java/io/opentelemetry/correlationcontext/CorrelationsContextUtils.java

@@ -1,99 +0,0 @@
-/*
- * Copyright 2019, OpenTelemetry Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.opentelemetry.correlationcontext;
-
-import io.grpc.Context;
-import io.opentelemetry.context.ContextUtils;
-import io.opentelemetry.context.Scope;
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.Immutable;
-
-/**
- * Utility methods for accessing the {@link CorrelationContext} contained in the {@link
- * io.grpc.Context}.
- *
- * @since 0.1.0
- */
-@Immutable
-public final class CorrelationsContextUtils {
-  private static final Context.Key<CorrelationContext> CORR_CONTEXT_KEY =
-      Context.key("opentelemetry-corr-context-key");
-
-  /**
-   * Creates a new {@code Context} with the given value set.
-   *
-   * @param corrContext the value to be set.
-   * @param context the parent {@code Context}.
-   * @return a new context with the given value set.
-   * @since 0.1.0
-   */
-  public static Context withCorrelationContext(CorrelationContext corrContext, Context context) {
-    return context.withValue(CORR_CONTEXT_KEY, corrContext);
-  }
-
-  /**
-   * Returns the {@link CorrelationContext} from the current {@code Context}, falling back to an
-   * empty {@link CorrelationContext}.
-   *
-   * @return the {@link CorrelationContext} from the current {@code Context}.
-   * @since 0.3.0
-   */
-  public static CorrelationContext getCurrentCorrelationContext() {
-    return getCorrelationContext(Context.current());
-  }
-
-  /**
-   * Returns the {@link CorrelationContext} from the specified {@code Context}, falling back to an
-   * empty {@link CorrelationContext}.
-   *
-   * @param context the specified {@code Context}.
-   * @return the {@link CorrelationContext} from the specified {@code Context}.
-   * @since 0.3.0
-   */
-  public static CorrelationContext getCorrelationContext(Context context) {
-    CorrelationContext corrContext = CORR_CONTEXT_KEY.get(context);
-    return corrContext == null ? EmptyCorrelationContext.getInstance() : corrContext;
-  }
-
-  /**
-   * Returns the {@link CorrelationContext} from the specified {@code Context}. If none is found,
-   * this method returns {code null}.
-   *
-   * @param context the specified {@code Context}.
-   * @return the {@link CorrelationContext} from the specified {@code Context}.
-   * @since 0.1.0
-   */
-  @Nullable
-  public static CorrelationContext getCorrelationContextWithoutDefault(Context context) {
-    return CORR_CONTEXT_KEY.get(context);
-  }
-
-  /**
-   * Returns a new {@link Scope} encapsulating the provided {@link CorrelationContext} added to the
-   * current {@code Context}.
-   *
-   * @param corrContext the {@link CorrelationContext} to be added to the current {@code Context}.
-   * @return the {@link Scope} for the updated {@code Context}.
-   * @since 0.1.0
-   */
-  public static Scope currentContextWith(CorrelationContext corrContext) {
-    Context context = withCorrelationContext(corrContext, Context.current());
-    return ContextUtils.withScopedContext(context);
-  }
-
-  private CorrelationsContextUtils() {}
-}

api/src/main/java/io/opentelemetry/correlationcontext/DefaultCorrelationContextManager.java

@@ -1,99 +0,0 @@
-/*
- * Copyright 2019, OpenTelemetry Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.opentelemetry.correlationcontext;
-
-import io.grpc.Context;
-import io.opentelemetry.context.Scope;
-import io.opentelemetry.internal.Utils;
-import javax.annotation.concurrent.Immutable;
-import javax.annotation.concurrent.ThreadSafe;
-
-/**
- * No-op implementations of {@link CorrelationContextManager}.
- *
- * @since 0.1.0
- */
-@ThreadSafe
-public final class DefaultCorrelationContextManager implements CorrelationContextManager {
-  private static final DefaultCorrelationContextManager INSTANCE =
-      new DefaultCorrelationContextManager();
-
-  /**
-   * Returns a {@code CorrelationContextManager} singleton that is the default implementation for
-   * {@link CorrelationContextManager}.
-   *
-   * @return a {@code CorrelationContextManager} singleton that is the default implementation for
-   *     {@link CorrelationContextManager}.
-   */
-  public static CorrelationContextManager getInstance() {
-    return INSTANCE;
-  }
-
-  @Override
-  public CorrelationContext getCurrentContext() {
-    return CorrelationsContextUtils.getCurrentCorrelationContext();
-  }
-
-  @Override
-  public CorrelationContext.Builder contextBuilder() {
-    return new NoopCorrelationContextBuilder();
-  }
-
-  @Override
-  public Scope withContext(CorrelationContext distContext) {
-    return CorrelationsContextUtils.currentContextWith(distContext);
-  }
-
-  @Immutable
-  private static final class NoopCorrelationContextBuilder implements CorrelationContext.Builder {
-    @Override
-    public CorrelationContext.Builder setParent(CorrelationContext parent) {
-      Utils.checkNotNull(parent, "parent");
-      return this;
-    }
-
-    @Override
-    public CorrelationContext.Builder setParent(Context context) {
-      Utils.checkNotNull(context, "context");
-      return this;
-    }
-
-    @Override
-    public CorrelationContext.Builder setNoParent() {
-      return this;
-    }
-
-    @Override
-    public CorrelationContext.Builder put(String key, String value, EntryMetadata entryMetadata) {
-      Utils.checkNotNull(key, "key");
-      Utils.checkNotNull(value, "value");
-      Utils.checkNotNull(entryMetadata, "entryMetadata");
-      return this;
-    }
-
-    @Override
-    public CorrelationContext.Builder remove(String key) {
-      Utils.checkNotNull(key, "key");
-      return this;
-    }
-
-    @Override
-    public CorrelationContext build() {
-      return EmptyCorrelationContext.getInstance();
-    }
-  }
-}

api/src/test/java/io/opentelemetry/OpenTelemetryTest.java

@@ -20,13 +20,13 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import io.opentelemetry.baggage.Baggage;
+import io.opentelemetry.baggage.BaggageManager;
+import io.opentelemetry.baggage.DefaultBaggageManager;
+import io.opentelemetry.baggage.spi.BaggageManagerFactory;
 import io.opentelemetry.context.Scope;
 import io.opentelemetry.context.propagation.ContextPropagators;
 import io.opentelemetry.context.propagation.DefaultContextPropagators;
-import io.opentelemetry.correlationcontext.CorrelationContext;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
-import io.opentelemetry.correlationcontext.DefaultCorrelationContextManager;
-import io.opentelemetry.correlationcontext.spi.CorrelationContextManagerFactory;
 import io.opentelemetry.metrics.BatchRecorder;
 import io.opentelemetry.metrics.DefaultMeterProvider;
 import io.opentelemetry.metrics.DoubleCounter;
@@ -71,7 +71,7 @@ class OpenTelemetryTest {
     OpenTelemetry.reset();
     System.clearProperty(TracerProviderFactory.class.getName());
     System.clearProperty(MeterProviderFactory.class.getName());
-    System.clearProperty(CorrelationContextManagerFactory.class.getName());
+    System.clearProperty(BaggageManagerFactory.class.getName());
   }
 
   @Test
@@ -80,10 +80,8 @@ class OpenTelemetryTest {
     assertThat(OpenTelemetry.getTracerProvider()).isSameAs(OpenTelemetry.getTracerProvider());
     assertThat(OpenTelemetry.getMeterProvider()).isInstanceOf(DefaultMeterProvider.class);
     assertThat(OpenTelemetry.getMeterProvider()).isSameAs(OpenTelemetry.getMeterProvider());
-    assertThat(OpenTelemetry.getCorrelationContextManager())
+    assertThat(OpenTelemetry.getBaggageManager()).isInstanceOf(DefaultBaggageManager.class);
-        .isInstanceOf(DefaultCorrelationContextManager.class);
+    assertThat(OpenTelemetry.getBaggageManager()).isSameAs(OpenTelemetry.getBaggageManager());
-    assertThat(OpenTelemetry.getCorrelationContextManager())
-        .isSameAs(OpenTelemetry.getCorrelationContextManager());
     assertThat(OpenTelemetry.getPropagators()).isInstanceOf(DefaultContextPropagators.class);
     assertThat(OpenTelemetry.getPropagators()).isSameAs(OpenTelemetry.getPropagators());
   }
@@ -169,48 +167,38 @@ class OpenTelemetryTest {
   }
 
   @Test
-  void testCorrelationContextManagerLoadArbitrary() throws IOException {
+  void testBaggageManagerLoadArbitrary() throws IOException {
     File serviceFile =
         createService(
-            CorrelationContextManagerFactory.class,
+            BaggageManagerFactory.class, FirstBaggageManager.class, SecondBaggageManager.class);
-            FirstCorrelationContextManager.class,
-            SecondCorrelationContextManager.class);
     try {
       assertTrue(
-          (OpenTelemetry.getCorrelationContextManager() instanceof FirstCorrelationContextManager)
+          (OpenTelemetry.getBaggageManager() instanceof FirstBaggageManager)
-              || (OpenTelemetry.getCorrelationContextManager()
+              || (OpenTelemetry.getBaggageManager() instanceof SecondBaggageManager));
-                  instanceof SecondCorrelationContextManager));
+      assertThat(OpenTelemetry.getBaggageManager()).isEqualTo(OpenTelemetry.getBaggageManager());
-      assertThat(OpenTelemetry.getCorrelationContextManager())
-          .isEqualTo(OpenTelemetry.getCorrelationContextManager());
     } finally {
       serviceFile.delete();
     }
   }
 
   @Test
-  void testCorrelationContextManagerSystemProperty() throws IOException {
+  void testBaggageManagerSystemProperty() throws IOException {
     File serviceFile =
         createService(
-            CorrelationContextManagerFactory.class,
+            BaggageManagerFactory.class, FirstBaggageManager.class, SecondBaggageManager.class);
-            FirstCorrelationContextManager.class,
+    System.setProperty(BaggageManagerFactory.class.getName(), SecondBaggageManager.class.getName());
-            SecondCorrelationContextManager.class);
-    System.setProperty(
-        CorrelationContextManagerFactory.class.getName(),
-        SecondCorrelationContextManager.class.getName());
     try {
-      assertThat(OpenTelemetry.getCorrelationContextManager())
+      assertThat(OpenTelemetry.getBaggageManager()).isInstanceOf(SecondBaggageManager.class);
-          .isInstanceOf(SecondCorrelationContextManager.class);
+      assertThat(OpenTelemetry.getBaggageManager()).isEqualTo(OpenTelemetry.getBaggageManager());
-      assertThat(OpenTelemetry.getCorrelationContextManager())
-          .isEqualTo(OpenTelemetry.getCorrelationContextManager());
     } finally {
       serviceFile.delete();
     }
   }
 
   @Test
-  void testCorrelationContextManagerNotFound() {
+  void testBaggageManagerNotFound() {
-    System.setProperty(CorrelationContextManagerFactory.class.getName(), "io.does.not.exists");
+    System.setProperty(BaggageManagerFactory.class.getName(), "io.does.not.exists");
-    assertThrows(IllegalStateException.class, () -> OpenTelemetry.getCorrelationContextManager());
+    assertThrows(IllegalStateException.class, () -> OpenTelemetry.getBaggageManager());
   }
 
   @Test
@@ -406,35 +394,34 @@ class OpenTelemetryTest {
     }
   }
 
-  public static class SecondCorrelationContextManager extends FirstCorrelationContextManager {
+  public static class SecondBaggageManager extends FirstBaggageManager {
     @Override
-    public CorrelationContextManager create() {
+    public BaggageManager create() {
-      return new SecondCorrelationContextManager();
+      return new SecondBaggageManager();
     }
   }
 
-  public static class FirstCorrelationContextManager
+  public static class FirstBaggageManager implements BaggageManager, BaggageManagerFactory {
-      implements CorrelationContextManager, CorrelationContextManagerFactory {
     @Override
-    public CorrelationContextManager create() {
+    public BaggageManager create() {
-      return new FirstCorrelationContextManager();
+      return new FirstBaggageManager();
     }
 
     @Nullable
     @Override
-    public CorrelationContext getCurrentContext() {
+    public Baggage getCurrentBaggage() {
       return null;
     }
 
     @Nullable
     @Override
-    public CorrelationContext.Builder contextBuilder() {
+    public Baggage.Builder baggageBuilder() {
       return null;
     }
 
     @Nullable
     @Override
-    public Scope withContext(CorrelationContext distContext) {
+    public Scope withContext(Baggage distContext) {
       return null;
     }
   }

api/src/test/java/io/opentelemetry/baggage/BaggageUtilsTest.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.opentelemetry.baggage;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import io.grpc.Context;
+import org.junit.jupiter.api.Test;
+
+class BaggageUtilsTest {
+
+  @Test
+  void testGetCurrentBaggage_Default() {
+    Baggage baggage = BaggageUtils.getCurrentBaggage();
+    assertThat(baggage).isSameAs(EmptyBaggage.getInstance());
+  }
+
+  @Test
+  void testGetCurrentBaggage_SetCorrContext() {
+    Baggage baggage = DefaultBaggageManager.getInstance().baggageBuilder().build();
+    Context orig = BaggageUtils.withBaggage(baggage, Context.current()).attach();
+    try {
+      assertThat(BaggageUtils.getCurrentBaggage()).isSameAs(baggage);
+    } finally {
+      Context.current().detach(orig);
+    }
+  }
+
+  @Test
+  void testGetBaggage_DefaultContext() {
+    Baggage baggage = BaggageUtils.getBaggage(Context.current());
+    assertThat(baggage).isSameAs(EmptyBaggage.getInstance());
+  }
+
+  @Test
+  void testGetBaggage_ExplicitContext() {
+    Baggage baggage = DefaultBaggageManager.getInstance().baggageBuilder().build();
+    Context context = BaggageUtils.withBaggage(baggage, Context.current());
+    assertThat(BaggageUtils.getBaggage(context)).isSameAs(baggage);
+  }
+
+  @Test
+  void testGetBaggageWithoutDefault_DefaultContext() {
+    Baggage baggage = BaggageUtils.getBaggageWithoutDefault(Context.current());
+    assertThat(baggage).isNull();
+  }
+
+  @Test
+  void testGetBaggageWithoutDefault_ExplicitContext() {
+    Baggage baggage = DefaultBaggageManager.getInstance().baggageBuilder().build();
+    Context context = BaggageUtils.withBaggage(baggage, Context.current());
+    assertThat(BaggageUtils.getBaggage(context)).isSameAs(baggage);
+  }
+}

api/src/test/java/io/opentelemetry/baggage/DefaultBaggageManagerTest.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
@@ -25,14 +25,13 @@ import java.util.Collection;
 import java.util.Collections;
 import org.junit.jupiter.api.Test;
 
-class DefaultCorrelationContextManagerTest {
+class DefaultBaggageManagerTest {
-  private static final CorrelationContextManager defaultCorrelationContextManager =
+  private static final BaggageManager DEFAULT_BAGGAGE_MANAGER = DefaultBaggageManager.getInstance();
-      DefaultCorrelationContextManager.getInstance();
   private static final String KEY = "key";
   private static final String VALUE = "value";
 
-  private static final CorrelationContext DIST_CONTEXT =
+  private static final Baggage DIST_CONTEXT =
-      new CorrelationContext() {
+      new Baggage() {
 
         @Override
         public Collection<Entry> getEntries() {
@@ -48,21 +47,19 @@ class DefaultCorrelationContextManagerTest {
 
   @Test
   void builderMethod() {
-    assertThat(defaultCorrelationContextManager.contextBuilder().build().getEntries()).isEmpty();
+    assertThat(DEFAULT_BAGGAGE_MANAGER.baggageBuilder().build().getEntries()).isEmpty();
   }
 
   @Test
   void getCurrentContext_DefaultContext() {
-    assertThat(defaultCorrelationContextManager.getCurrentContext())
+    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-        .isSameAs(EmptyCorrelationContext.getInstance());
   }
 
   @Test
   void getCurrentContext_ContextSetToNull() {
-    Context orig =
+    Context orig = BaggageUtils.withBaggage(null, Context.current()).attach();
-        CorrelationsContextUtils.withCorrelationContext(null, Context.current()).attach();
     try {
-      CorrelationContext distContext = defaultCorrelationContextManager.getCurrentContext();
+      Baggage distContext = DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage();
       assertThat(distContext).isNotNull();
       assertThat(distContext.getEntries()).isEmpty();
     } finally {
@@ -72,69 +69,61 @@ class DefaultCorrelationContextManagerTest {
 
   @Test
   void withContext() {
-    assertThat(defaultCorrelationContextManager.getCurrentContext())
+    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-        .isSameAs(EmptyCorrelationContext.getInstance());
+    try (Scope wtm = DEFAULT_BAGGAGE_MANAGER.withContext(DIST_CONTEXT)) {
-    try (Scope wtm = defaultCorrelationContextManager.withContext(DIST_CONTEXT)) {
+      assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(DIST_CONTEXT);
-      assertThat(defaultCorrelationContextManager.getCurrentContext()).isSameAs(DIST_CONTEXT);
     }
-    assertThat(defaultCorrelationContextManager.getCurrentContext())
+    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-        .isSameAs(EmptyCorrelationContext.getInstance());
   }
 
   @Test
   void withContext_nullContext() {
-    assertThat(defaultCorrelationContextManager.getCurrentContext())
+    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-        .isSameAs(EmptyCorrelationContext.getInstance());
+    try (Scope wtm = DEFAULT_BAGGAGE_MANAGER.withContext(null)) {
-    try (Scope wtm = defaultCorrelationContextManager.withContext(null)) {
+      assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-      assertThat(defaultCorrelationContextManager.getCurrentContext())
-          .isSameAs(EmptyCorrelationContext.getInstance());
     }
-    assertThat(defaultCorrelationContextManager.getCurrentContext())
+    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-        .isSameAs(EmptyCorrelationContext.getInstance());
   }
 
   @Test
   void withContextUsingWrap() {
     Runnable runnable;
-    try (Scope wtm = defaultCorrelationContextManager.withContext(DIST_CONTEXT)) {
+    try (Scope wtm = DEFAULT_BAGGAGE_MANAGER.withContext(DIST_CONTEXT)) {
-      assertThat(defaultCorrelationContextManager.getCurrentContext()).isSameAs(DIST_CONTEXT);
+      assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(DIST_CONTEXT);
       runnable =
           Context.current()
               .wrap(
                   () -> {
-                    assertThat(defaultCorrelationContextManager.getCurrentContext())
+                    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(DIST_CONTEXT);
-                        .isSameAs(DIST_CONTEXT);
                   });
     }
-    assertThat(defaultCorrelationContextManager.getCurrentContext())
+    assertThat(DEFAULT_BAGGAGE_MANAGER.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-        .isSameAs(EmptyCorrelationContext.getInstance());
+    // When we run the runnable we will have the Baggage in the current Context.
-    // When we run the runnable we will have the CorrelationContext in the current Context.
     runnable.run();
   }
 
   @Test
   void noopContextBuilder_SetParent_DisallowsNullParent() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
-    assertThrows(
+    assertThrows(NullPointerException.class, () -> noopBuilder.setParent((Baggage) null));
-        NullPointerException.class, () -> noopBuilder.setParent((CorrelationContext) null));
   }
 
   @Test
   void noopContextBuilder_SetParent_DisallowsNullContext() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
     assertThrows(NullPointerException.class, () -> noopBuilder.setParent((Context) null));
     ;
   }
 
   @Test
   void noopContextBuilder_SetParent_fromContext() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
     noopBuilder.setParent(Context.current()); // No error.
   }
 
   @Test
   void noopContextBuilder_Put_DisallowsNullKey() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
     assertThrows(
         NullPointerException.class,
         () -> noopBuilder.put(null, VALUE, Entry.METADATA_UNLIMITED_PROPAGATION));
@@ -142,7 +131,7 @@ class DefaultCorrelationContextManagerTest {
 
   @Test
   void noopContextBuilder_Put_DisallowsNullValue() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
     assertThrows(
         NullPointerException.class,
         () -> noopBuilder.put(KEY, null, Entry.METADATA_UNLIMITED_PROPAGATION));
@@ -150,13 +139,13 @@ class DefaultCorrelationContextManagerTest {
 
   @Test
   void noopContextBuilder_Put_DisallowsNullEntryMetadata() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
     assertThrows(NullPointerException.class, () -> noopBuilder.put(KEY, VALUE, null));
   }
 
   @Test
   void noopContextBuilder_Remove_DisallowsNullKey() {
-    CorrelationContext.Builder noopBuilder = defaultCorrelationContextManager.contextBuilder();
+    Baggage.Builder noopBuilder = DEFAULT_BAGGAGE_MANAGER.baggageBuilder();
     assertThrows(NullPointerException.class, () -> noopBuilder.remove(null));
   }
 }

api/src/test/java/io/opentelemetry/baggage/EntryMetadataTest.java

@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 import com.google.common.testing.EqualsTester;
-import io.opentelemetry.correlationcontext.EntryMetadata.EntryTtl;
+import io.opentelemetry.baggage.EntryMetadata.EntryTtl;
 import org.junit.jupiter.api.Test;
 
 class EntryMetadataTest {

api/src/test/java/io/opentelemetry/baggage/EntryTest.java

@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.correlationcontext;
+package io.opentelemetry.baggage;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import com.google.common.testing.EqualsTester;
-import io.opentelemetry.correlationcontext.EntryMetadata.EntryTtl;
+import io.opentelemetry.baggage.EntryMetadata.EntryTtl;
 import java.util.Arrays;
 import org.junit.jupiter.api.Test;
 

api/src/test/java/io/opentelemetry/correlationcontext/CorrelationsContextUtilsTest.java

@@ -1,76 +0,0 @@
-/*
- * Copyright 2019, OpenTelemetry Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.opentelemetry.correlationcontext;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-import io.grpc.Context;
-import org.junit.jupiter.api.Test;
-
-class CorrelationsContextUtilsTest {
-
-  @Test
-  void testGetCurrentCorrelationContext_Default() {
-    CorrelationContext corrContext = CorrelationsContextUtils.getCurrentCorrelationContext();
-    assertThat(corrContext).isSameAs(EmptyCorrelationContext.getInstance());
-  }
-
-  @Test
-  void testGetCurrentCorrelationContext_SetCorrContext() {
-    CorrelationContext corrContext =
-        DefaultCorrelationContextManager.getInstance().contextBuilder().build();
-    Context orig =
-        CorrelationsContextUtils.withCorrelationContext(corrContext, Context.current()).attach();
-    try {
-      assertThat(CorrelationsContextUtils.getCurrentCorrelationContext()).isSameAs(corrContext);
-    } finally {
-      Context.current().detach(orig);
-    }
-  }
-
-  @Test
-  void testGetCorrelationContext_DefaultContext() {
-    CorrelationContext corrContext =
-        CorrelationsContextUtils.getCorrelationContext(Context.current());
-    assertThat(corrContext).isSameAs(EmptyCorrelationContext.getInstance());
-  }
-
-  @Test
-  void testGetCorrelationContext_ExplicitContext() {
-    CorrelationContext corrContext =
-        DefaultCorrelationContextManager.getInstance().contextBuilder().build();
-    Context context =
-        CorrelationsContextUtils.withCorrelationContext(corrContext, Context.current());
-    assertThat(CorrelationsContextUtils.getCorrelationContext(context)).isSameAs(corrContext);
-  }
-
-  @Test
-  void testGetCorrelationContextWithoutDefault_DefaultContext() {
-    CorrelationContext corrContext =
-        CorrelationsContextUtils.getCorrelationContextWithoutDefault(Context.current());
-    assertThat(corrContext).isNull();
-  }
-
-  @Test
-  void testGetCorrelationContextWithoutDefault_ExplicitContext() {
-    CorrelationContext corrContext =
-        DefaultCorrelationContextManager.getInstance().contextBuilder().build();
-    Context context =
-        CorrelationsContextUtils.withCorrelationContext(corrContext, Context.current());
-    assertThat(CorrelationsContextUtils.getCorrelationContext(context)).isSameAs(corrContext);
-  }
-}

context_prop/src/main/java/io/opentelemetry/context/propagation/DefaultContextPropagators.java

@@ -66,7 +66,7 @@ public final class DefaultContextPropagators implements ContextPropagators {
    * <pre>{@code
    * ContextPropagators propagators = DefaultContextPropagators.builder()
    *     .addTextMapPropagator(new HttpTraceContext())
-   *     .addTextMapPropagator(new HttpCorrelationContext())
+   *     .addTextMapPropagator(new HttpBaggage())
    *     .addTextMapPropagator(new MyCustomContextPropagator())
    *     .build();
    * }</pre>

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/BaseShimObject.java

@@ -16,8 +16,8 @@
 
 package io.opentelemetry.opentracingshim;
 
+import io.opentelemetry.baggage.BaggageManager;
 import io.opentelemetry.context.propagation.ContextPropagators;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
 import io.opentelemetry.trace.Tracer;
 
 abstract class BaseShimObject {
@@ -35,7 +35,7 @@ abstract class BaseShimObject {
     return telemetryInfo.tracer();
   }
 
-  CorrelationContextManager contextManager() {
+  BaggageManager contextManager() {
     return telemetryInfo.contextManager();
   }
 

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/Propagation.java

@@ -17,8 +17,8 @@
 package io.opentelemetry.opentracingshim;
 
 import io.grpc.Context;
+import io.opentelemetry.baggage.BaggageUtils;
 import io.opentelemetry.context.propagation.TextMapPropagator;
-import io.opentelemetry.correlationcontext.CorrelationsContextUtils;
 import io.opentelemetry.trace.DefaultSpan;
 import io.opentelemetry.trace.Span;
 import io.opentelemetry.trace.TracingContextUtils;
@@ -37,9 +37,7 @@ final class Propagation extends BaseShimObject {
     Context context =
         TracingContextUtils.withSpan(
             DefaultSpan.create(contextShim.getSpanContext()), Context.current());
-    context =
+    context = BaggageUtils.withBaggage(contextShim.getBaggage(), context);
-        CorrelationsContextUtils.withCorrelationContext(
-            contextShim.getCorrelationContext(), context);
 
     propagators().getTextMapPropagator().inject(context, carrier, TextMapSetter.INSTANCE);
   }
@@ -61,8 +59,7 @@ final class Propagation extends BaseShimObject {
       return null;
     }
 
-    return new SpanContextShim(
+    return new SpanContextShim(telemetryInfo, span.getContext(), BaggageUtils.getBaggage(context));
-        telemetryInfo, span.getContext(), CorrelationsContextUtils.getCorrelationContext(context));
   }
 
   static final class TextMapSetter implements TextMapPropagator.Setter<TextMapInject> {

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/SpanBuilderShim.java

@@ -22,8 +22,8 @@ import static io.opentelemetry.common.AttributesKeys.longKey;
 import static io.opentelemetry.common.AttributesKeys.stringKey;
 
 import io.grpc.Context;
+import io.opentelemetry.baggage.Baggage;
 import io.opentelemetry.common.AttributeKey;
-import io.opentelemetry.correlationcontext.CorrelationContext;
 import io.opentelemetry.trace.DefaultSpan;
 import io.opentelemetry.trace.Span.Kind;
 import io.opentelemetry.trace.Status;
@@ -189,7 +189,7 @@ final class SpanBuilderShim extends BaseShimObject implements SpanBuilder {
   @SuppressWarnings({"rawtypes", "unchecked"})
   @Override
   public Span start() {
-    CorrelationContext distContext = null;
+    Baggage distContext = null;
     io.opentelemetry.trace.Span.Builder builder = tracer().spanBuilder(spanName);
 
     if (ignoreActiveSpan && parentSpan == null && parentSpanContext == null) {
@@ -197,12 +197,12 @@ final class SpanBuilderShim extends BaseShimObject implements SpanBuilder {
     } else if (parentSpan != null) {
       builder.setParent(TracingContextUtils.withSpan(parentSpan.getSpan(), Context.ROOT));
       SpanContextShim contextShim = spanContextTable().get(parentSpan);
-      distContext = contextShim == null ? null : contextShim.getCorrelationContext();
+      distContext = contextShim == null ? null : contextShim.getBaggage();
     } else if (parentSpanContext != null) {
       builder.setParent(
           TracingContextUtils.withSpan(
               DefaultSpan.create(parentSpanContext.getSpanContext()), Context.ROOT));
-      distContext = parentSpanContext.getCorrelationContext();
+      distContext = parentSpanContext.getBaggage();
     }
 
     for (io.opentelemetry.trace.SpanContext link : parentLinks) {
@@ -226,7 +226,7 @@ final class SpanBuilderShim extends BaseShimObject implements SpanBuilder {
 
     SpanShim spanShim = new SpanShim(telemetryInfo(), span);
 
-    if (distContext != null && distContext != telemetryInfo().emptyCorrelationContext()) {
+    if (distContext != null && distContext != telemetryInfo().emptyBaggage()) {
       spanContextTable().create(spanShim, distContext);
     }
 

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/SpanContextShim.java

@@ -16,9 +16,9 @@
 
 package io.opentelemetry.opentracingshim;
 
-import io.opentelemetry.correlationcontext.CorrelationContext;
+import io.opentelemetry.baggage.Baggage;
-import io.opentelemetry.correlationcontext.Entry;
+import io.opentelemetry.baggage.Entry;
-import io.opentelemetry.correlationcontext.EntryMetadata;
+import io.opentelemetry.baggage.EntryMetadata;
 import io.opentracing.SpanContext;
 import java.util.Iterator;
 import java.util.Map;
@@ -28,30 +28,30 @@ final class SpanContextShim extends BaseShimObject implements SpanContext {
       EntryMetadata.create(EntryMetadata.EntryTtl.UNLIMITED_PROPAGATION);
 
   private final io.opentelemetry.trace.SpanContext context;
-  private final CorrelationContext distContext;
+  private final Baggage distContext;
 
   public SpanContextShim(SpanShim spanShim) {
     this(
         spanShim.telemetryInfo(),
         spanShim.getSpan().getContext(),
-        spanShim.telemetryInfo().emptyCorrelationContext());
+        spanShim.telemetryInfo().emptyBaggage());
   }
 
   public SpanContextShim(TelemetryInfo telemetryInfo, io.opentelemetry.trace.SpanContext context) {
-    this(telemetryInfo, context, telemetryInfo.emptyCorrelationContext());
+    this(telemetryInfo, context, telemetryInfo.emptyBaggage());
   }
 
   public SpanContextShim(
       TelemetryInfo telemetryInfo,
       io.opentelemetry.trace.SpanContext context,
-      CorrelationContext distContext) {
+      Baggage distContext) {
     super(telemetryInfo);
     this.context = context;
     this.distContext = distContext;
   }
 
   SpanContextShim newWithKeyValue(String key, String value) {
-    CorrelationContext.Builder builder = contextManager().contextBuilder().setParent(distContext);
+    Baggage.Builder builder = contextManager().baggageBuilder().setParent(distContext);
     builder.put(key, value, DEFAULT_ENTRY_METADATA);
 
     return new SpanContextShim(telemetryInfo(), context, builder.build());
@@ -61,7 +61,7 @@ final class SpanContextShim extends BaseShimObject implements SpanContext {
     return context;
   }
 
-  CorrelationContext getCorrelationContext() {
+  Baggage getBaggage() {
     return distContext;
   }
 

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/SpanContextShimTable.java

@@ -16,7 +16,7 @@
 
 package io.opentelemetry.opentracingshim;
 
-import io.opentelemetry.correlationcontext.CorrelationContext;
+import io.opentelemetry.baggage.Baggage;
 import io.opentelemetry.trace.Span;
 import java.util.Map;
 import java.util.WeakHashMap;
@@ -27,7 +27,7 @@ import javax.annotation.Nullable;
 /*
  * SpanContextShimTable stores and manages OpenTracing SpanContext instances,
  * which are expected to a unmodfiable union of SpanContext and Baggage
- * (CorrelationContext/TagMap under OpenTelemetry).
+ * (Baggage/TagMap under OpenTelemetry).
  *
  * This requires that changes on a given Span and its (new) SpanContext
  * are visible in all threads at *any* moment. The current approach uses
@@ -85,10 +85,10 @@ final class SpanContextShimTable {
   }
 
   public SpanContextShim create(SpanShim spanShim) {
-    return create(spanShim, spanShim.telemetryInfo().emptyCorrelationContext());
+    return create(spanShim, spanShim.telemetryInfo().emptyBaggage());
   }
 
-  public SpanContextShim create(SpanShim spanShim, CorrelationContext distContext) {
+  public SpanContextShim create(SpanShim spanShim, Baggage distContext) {
     lock.writeLock().lock();
     try {
       SpanContextShim contextShim = shimsMap.get(spanShim.getSpan());

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/TelemetryInfo.java

@@ -16,28 +16,27 @@
 
 package io.opentelemetry.opentracingshim;
 
+import io.opentelemetry.baggage.Baggage;
+import io.opentelemetry.baggage.BaggageManager;
 import io.opentelemetry.context.propagation.ContextPropagators;
-import io.opentelemetry.correlationcontext.CorrelationContext;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
 import io.opentelemetry.trace.Tracer;
 
 /**
- * Utility class that holds a Tracer, a CorrelationContextManager, and related objects that are core
+ * Utility class that holds a Tracer, a BaggageManager, and related objects that are core part of
- * part of the OT Shim layer.
+ * the OT Shim layer.
  */
 final class TelemetryInfo {
   private final Tracer tracer;
-  private final CorrelationContextManager contextManager;
+  private final BaggageManager contextManager;
-  private final CorrelationContext emptyCorrelationContext;
+  private final Baggage emptyBaggage;
   private final ContextPropagators propagators;
   private final SpanContextShimTable spanContextTable;
 
-  TelemetryInfo(
+  TelemetryInfo(Tracer tracer, BaggageManager contextManager, ContextPropagators propagators) {
-      Tracer tracer, CorrelationContextManager contextManager, ContextPropagators propagators) {
     this.tracer = tracer;
     this.contextManager = contextManager;
     this.propagators = propagators;
-    this.emptyCorrelationContext = contextManager.contextBuilder().build();
+    this.emptyBaggage = contextManager.baggageBuilder().build();
     this.spanContextTable = new SpanContextShimTable();
   }
 
@@ -45,7 +44,7 @@ final class TelemetryInfo {
     return tracer;
   }
 
-  CorrelationContextManager contextManager() {
+  BaggageManager contextManager() {
     return contextManager;
   }
 
@@ -53,8 +52,8 @@ final class TelemetryInfo {
     return spanContextTable;
   }
 
-  CorrelationContext emptyCorrelationContext() {
+  Baggage emptyBaggage() {
-    return emptyCorrelationContext;
+    return emptyBaggage;
   }
 
   ContextPropagators propagators() {

opentracing_shim/src/main/java/io/opentelemetry/opentracingshim/TraceShim.java

@@ -17,7 +17,7 @@
 package io.opentelemetry.opentracingshim;
 
 import io.opentelemetry.OpenTelemetry;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
+import io.opentelemetry.baggage.BaggageManager;
 import io.opentelemetry.trace.Tracer;
 import io.opentelemetry.trace.TracerProvider;
 import java.util.Objects;
@@ -27,7 +27,7 @@ public final class TraceShim {
 
   /**
    * Creates a {@code io.opentracing.Tracer} shim out of {@code OpenTelemetry.getTracer()} and
-   * {@code OpenTelemetry.getCorrelationContextManager()}.
+   * {@code OpenTelemetry.getBaggageManager()}.
    *
    * @return a {@code io.opentracing.Tracer}.
    * @since 0.1.0
@@ -36,21 +36,21 @@ public final class TraceShim {
     return new TracerShim(
         new TelemetryInfo(
             getTracer(OpenTelemetry.getTracerProvider()),
-            OpenTelemetry.getCorrelationContextManager(),
+            OpenTelemetry.getBaggageManager(),
             OpenTelemetry.getPropagators()));
   }
 
   /**
    * Creates a {@code io.opentracing.Tracer} shim out the specified {@code Tracer} and {@code
-   * CorrelationContextManager}.
+   * BaggageManager}.
    *
    * @param tracerProvider the {@code TracerProvider} used by this shim.
-   * @param contextManager the {@code CorrelationContextManager} used by this shim.
+   * @param contextManager the {@code BaggageManager} used by this shim.
    * @return a {@code io.opentracing.Tracer}.
    * @since 0.1.0
    */
   public static io.opentracing.Tracer createTracerShim(
-      TracerProvider tracerProvider, CorrelationContextManager contextManager) {
+      TracerProvider tracerProvider, BaggageManager contextManager) {
     return new TracerShim(
         new TelemetryInfo(
             getTracer(Objects.requireNonNull(tracerProvider, "tracerProvider")),

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/SpanBuilderShimTest.java

@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 
 import io.opentelemetry.OpenTelemetry;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.trace.Tracer;
 import org.junit.jupiter.api.Test;
@@ -30,7 +30,7 @@ class SpanBuilderShimTest {
   private final TracerSdkProvider tracerSdkFactory = TracerSdkProvider.builder().build();
   private final Tracer tracer = tracerSdkFactory.get("SpanShimTest");
   private final TelemetryInfo telemetryInfo =
-      new TelemetryInfo(tracer, new CorrelationContextManagerSdk(), OpenTelemetry.getPropagators());
+      new TelemetryInfo(tracer, new BaggageManagerSdk(), OpenTelemetry.getPropagators());
 
   private static final String SPAN_NAME = "Span";
 

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/SpanShimTest.java

@@ -24,7 +24,7 @@ import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import io.opentelemetry.OpenTelemetry;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.trace.Span;
 import io.opentelemetry.trace.Tracer;
@@ -37,7 +37,7 @@ class SpanShimTest {
   private final TracerSdkProvider tracerSdkFactory = TracerSdkProvider.builder().build();
   private final Tracer tracer = tracerSdkFactory.get("SpanShimTest");
   private final TelemetryInfo telemetryInfo =
-      new TelemetryInfo(tracer, new CorrelationContextManagerSdk(), OpenTelemetry.getPropagators());
+      new TelemetryInfo(tracer, new BaggageManagerSdk(), OpenTelemetry.getPropagators());
   private Span span;
 
   private static final String SPAN_NAME = "Span";

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/TraceShimTest.java

@@ -16,13 +16,13 @@
 
 package io.opentelemetry.opentracingshim;
 
-import static io.opentelemetry.OpenTelemetry.getCorrelationContextManager;
+import static io.opentelemetry.OpenTelemetry.getBaggageManager;
 import static io.opentelemetry.OpenTelemetry.getTracerProvider;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import io.opentelemetry.OpenTelemetry;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import org.junit.jupiter.api.Test;
 
@@ -32,14 +32,14 @@ class TraceShimTest {
   void createTracerShim_default() {
     TracerShim tracerShim = (TracerShim) TraceShim.createTracerShim();
     assertEquals(OpenTelemetry.getTracer("opentracingshim"), tracerShim.tracer());
-    assertEquals(OpenTelemetry.getCorrelationContextManager(), tracerShim.contextManager());
+    assertEquals(OpenTelemetry.getBaggageManager(), tracerShim.contextManager());
   }
 
   @Test
   void createTracerShim_nullTracer() {
     assertThrows(
         NullPointerException.class,
-        () -> TraceShim.createTracerShim(null, getCorrelationContextManager()),
+        () -> TraceShim.createTracerShim(null, getBaggageManager()),
         "tracerProvider");
   }
 
@@ -54,7 +54,7 @@ class TraceShimTest {
   @Test
   void createTracerShim() {
     TracerSdkProvider sdk = TracerSdkProvider.builder().build();
-    CorrelationContextManagerSdk contextManager = new CorrelationContextManagerSdk();
+    BaggageManagerSdk contextManager = new BaggageManagerSdk();
     TracerShim tracerShim = (TracerShim) TraceShim.createTracerShim(sdk, contextManager);
     assertEquals(sdk.get("opentracingshim"), tracerShim.tracer());
     assertEquals(contextManager, tracerShim.contextManager());

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/TracerShimTest.java

@@ -43,7 +43,7 @@ class TracerShimTest {
         new TracerShim(
             new TelemetryInfo(
                 OpenTelemetry.getTracer("opentracingshim"),
-                OpenTelemetry.getCorrelationContextManager(),
+                OpenTelemetry.getBaggageManager(),
                 OpenTelemetry.getPropagators()));
   }
 

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/OpenTelemetryInteroperabilityTest.java

@@ -19,7 +19,7 @@ package io.opentelemetry.opentracingshim.testbed;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNull;
 
-import io.opentelemetry.correlationcontext.DefaultCorrelationContextManager;
+import io.opentelemetry.baggage.DefaultBaggageManager;
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
@@ -38,7 +38,7 @@ class OpenTelemetryInteroperabilityTest {
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
   private final Tracer otTracer =
-      TraceShim.createTracerShim(sdk, DefaultCorrelationContextManager.getInstance());
+      TraceShim.createTracerShim(sdk, DefaultBaggageManager.getInstance());
 
   @BeforeEach
   void before() {

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/activespanreplacement/ActiveSpanReplacementTest.java

@@ -27,7 +27,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.SpanId;
@@ -46,7 +46,7 @@ class ActiveSpanReplacementTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/actorpropagation/ActorPropagationTest.java

@@ -22,7 +22,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.Span.Kind;
@@ -51,7 +51,7 @@ class ActorPropagationTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private Phaser phaser;
 
   @BeforeEach

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/baggagehandling/BaggageHandlingTest.java

@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentracing.Span;
 import io.opentracing.Tracer;
@@ -34,7 +34,7 @@ public final class BaggageHandlingTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/clientserver/TestClientServerTest.java

@@ -25,7 +25,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.Span.Kind;
@@ -42,7 +42,7 @@ class TestClientServerTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final ArrayBlockingQueue<Message> queue = new ArrayBlockingQueue<>(10);
   private Server server;
 

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/concurrentcommonrequesthandler/HandlerTest.java

@@ -26,7 +26,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.Span.Kind;
@@ -50,7 +50,7 @@ class HandlerTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final Client client = new Client(new RequestHandler(tracer));
 
   @BeforeEach

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/errorreporting/ErrorReportingTest.java

@@ -24,7 +24,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.sdk.trace.data.SpanData.Event;
@@ -48,7 +48,7 @@ public final class ErrorReportingTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   /* Very simple error handling **/

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/latespanfinish/LateSpanFinishTest.java

@@ -24,7 +24,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentracing.Scope;
@@ -41,7 +41,7 @@ public final class LateSpanFinishTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/listenerperrequest/ListenerTest.java

@@ -21,7 +21,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.Span;
@@ -34,7 +34,7 @@ class ListenerTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
 
   @Test
   void test() throws Exception {

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/multiplecallbacks/MultipleCallbacksTest.java

@@ -24,7 +24,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentracing.Scope;
@@ -46,7 +46,7 @@ class MultipleCallbacksTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
 
   @Test
   void test() {

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/nestedcallbacks/NestedCallbacksTest.java

@@ -26,7 +26,7 @@ import static org.junit.jupiter.api.Assertions.assertNull;
 import io.opentelemetry.common.ReadableAttributes;
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentracing.Scope;
@@ -44,7 +44,7 @@ public final class NestedCallbacksTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final ExecutorService executor = Executors.newCachedThreadPool();
 
   @Test

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/promisepropagation/PromisePropagationTest.java

@@ -23,7 +23,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 import io.opentelemetry.common.AttributeKey;
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.SpanId;
@@ -50,7 +50,7 @@ class PromisePropagationTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private Phaser phaser;
 
   @BeforeEach

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/statelesscommonrequesthandler/HandlerTest.java

@@ -20,7 +20,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentracing.Tracer;
@@ -39,7 +39,7 @@ public final class HandlerTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
   private final Client client = new Client(new RequestHandler(tracer));
 
   @BeforeEach

opentracing_shim/src/test/java/io/opentelemetry/opentracingshim/testbed/suspendresumepropagation/SuspendResumePropagationTest.java

@@ -20,7 +20,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.exporters.inmemory.InMemoryTracing;
 import io.opentelemetry.opentracingshim.TraceShim;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import io.opentelemetry.sdk.trace.data.SpanData;
 import io.opentelemetry.trace.SpanId;
@@ -39,7 +39,7 @@ class SuspendResumePropagationTest {
   private final TracerSdkProvider sdk = TracerSdkProvider.builder().build();
   private final InMemoryTracing inMemoryTracing =
       InMemoryTracing.builder().setTracerProvider(sdk).build();
-  private final Tracer tracer = TraceShim.createTracerShim(sdk, new CorrelationContextManagerSdk());
+  private final Tracer tracer = TraceShim.createTracerShim(sdk, new BaggageManagerSdk());
 
   @BeforeEach
   void before() {}

sdk/all/build.gradle

@@ -13,7 +13,7 @@ ext.propertiesDir = "build/generated/properties/io/opentelemetry/sdk"
 dependencies {
     api project(':opentelemetry-api'),
             project(':opentelemetry-sdk-common'),
-            project(':opentelemetry-sdk-correlation-context'),
+            project(':opentelemetry-sdk-baggage'),
             project(':opentelemetry-sdk-metrics'),
             project(':opentelemetry-sdk-tracing')
 

sdk/all/src/main/java/io/opentelemetry/sdk/OpenTelemetrySdk.java

@@ -18,14 +18,14 @@ package io.opentelemetry.sdk;
 
 import io.opentelemetry.OpenTelemetry;
 import io.opentelemetry.internal.Obfuscated;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import io.opentelemetry.sdk.metrics.MeterSdkProvider;
 import io.opentelemetry.sdk.trace.TracerSdkProvider;
 import javax.annotation.concurrent.ThreadSafe;
 
 /**
  * This class provides a static global accessor for SDK telemetry objects {@link TracerSdkProvider},
- * {@link MeterSdkProvider} and {@link CorrelationContextManagerSdk}.
+ * {@link MeterSdkProvider} and {@link BaggageManagerSdk}.
  *
  * <p>This is a convenience class getting and casting the telemetry objects from {@link
  * OpenTelemetry}.
@@ -53,12 +53,12 @@ public final class OpenTelemetrySdk {
   }
 
   /**
-   * Returns a {@link CorrelationContextManagerSdk}.
+   * Returns a {@link BaggageManagerSdk}.
    *
-   * @return context manager returned by {@link OpenTelemetry#getCorrelationContextManager()}.
+   * @return context manager returned by {@link OpenTelemetry#getBaggageManager()}.
    */
-  public static CorrelationContextManagerSdk getCorrelationContextManager() {
+  public static BaggageManagerSdk getBaggageManager() {
-    return (CorrelationContextManagerSdk) OpenTelemetry.getCorrelationContextManager();
+    return (BaggageManagerSdk) OpenTelemetry.getBaggageManager();
   }
 
   private OpenTelemetrySdk() {}

sdk/all/src/test/java/io/opentelemetry/sdk/OpenTelemetrySdkTest.java

@@ -27,8 +27,7 @@ class OpenTelemetrySdkTest {
   void testDefault() {
     assertThat(OpenTelemetrySdk.getTracerProvider().get(""))
         .isSameAs(OpenTelemetry.getTracerProvider().get(""));
-    assertThat(OpenTelemetrySdk.getCorrelationContextManager())
+    assertThat(OpenTelemetrySdk.getBaggageManager()).isSameAs(OpenTelemetry.getBaggageManager());
-        .isSameAs(OpenTelemetry.getCorrelationContextManager());
     assertThat(OpenTelemetrySdk.getMeterProvider()).isSameAs(OpenTelemetry.getMeterProvider());
   }
 

sdk/baggage/build.gradle

@@ -5,9 +5,9 @@ plugins {
     id "ru.vyarus.animalsniffer"
 }
 
-description = 'OpenTelemetry SDK Correlation Context'
+description = 'OpenTelemetry SDK Baggage'
-ext.moduleName = "io.opentelemetry.sdk.correlationcontext"
+ext.moduleName = "io.opentelemetry.sdk.baggage"
-ext.propertiesDir = "build/generated/properties/io/opentelemetry/sdk/correlationcontext"
+ext.propertiesDir = "build/generated/properties/io/opentelemetry/sdk/baggage"
 
 dependencies {
     api project(':opentelemetry-api'),

sdk/baggage/src/main/java/io/opentelemetry/sdk/baggage/BaggageManagerSdk.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2019, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.opentelemetry.sdk.baggage;
+
+import io.opentelemetry.baggage.Baggage;
+import io.opentelemetry.baggage.BaggageManager;
+import io.opentelemetry.baggage.BaggageUtils;
+import io.opentelemetry.context.Scope;
+
+/** {@link BaggageManagerSdk} is SDK implementation of {@link BaggageManager}. */
+public class BaggageManagerSdk implements BaggageManager {
+
+  @Override
+  public Baggage getCurrentBaggage() {
+    return BaggageUtils.getCurrentBaggage();
+  }
+
+  @Override
+  public Baggage.Builder baggageBuilder() {
+    return new BaggageSdk.Builder();
+  }
+
+  @Override
+  public Scope withContext(Baggage distContext) {
+    return BaggageUtils.currentContextWith(distContext);
+  }
+}

sdk/baggage/src/main/java/io/opentelemetry/sdk/baggage/BaggageSdk.java

@@ -14,14 +14,14 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext;
+package io.opentelemetry.sdk.baggage;
 
 import io.grpc.Context;
 import io.opentelemetry.OpenTelemetry;
-import io.opentelemetry.correlationcontext.CorrelationContext;
+import io.opentelemetry.baggage.Baggage;
-import io.opentelemetry.correlationcontext.CorrelationsContextUtils;
+import io.opentelemetry.baggage.BaggageUtils;
-import io.opentelemetry.correlationcontext.Entry;
+import io.opentelemetry.baggage.Entry;
-import io.opentelemetry.correlationcontext.EntryMetadata;
+import io.opentelemetry.baggage.EntryMetadata;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -34,19 +34,19 @@ import javax.annotation.concurrent.Immutable;
 @Immutable
 // TODO: Migrate to AutoValue
 // @AutoValue
-class CorrelationContextSdk implements CorrelationContext {
+class BaggageSdk implements Baggage {
 
   // The types of the EntryKey and Entry must match for each entry.
   private final Map<String, Entry> entries;
-  @Nullable private final CorrelationContext parent;
+  @Nullable private final Baggage parent;
 
   /**
-   * Creates a new {@link CorrelationContextSdk} with the given entries.
+   * Creates a new {@link BaggageSdk} with the given entries.
    *
-   * @param entries the initial entries for this {@code CorrelationContextSdk}.
+   * @param entries the initial entries for this {@code BaggageSdk}.
    * @param parent providing a default set of entries
    */
-  private CorrelationContextSdk(Map<String, ? extends Entry> entries, CorrelationContext parent) {
+  private BaggageSdk(Map<String, ? extends Entry> entries, Baggage parent) {
     this.entries =
         Collections.unmodifiableMap(new HashMap<>(Objects.requireNonNull(entries, "entries")));
     this.parent = parent;
@@ -88,11 +88,11 @@ class CorrelationContextSdk implements CorrelationContext {
     if (this == o) {
       return true;
     }
-    if (o == null || !(o instanceof CorrelationContextSdk)) {
+    if (o == null || !(o instanceof BaggageSdk)) {
       return false;
     }
 
-    CorrelationContextSdk distContextSdk = (CorrelationContextSdk) o;
+    BaggageSdk distContextSdk = (BaggageSdk) o;
 
     if (!entries.equals(distContextSdk.entries)) {
       return false;
@@ -109,38 +109,38 @@ class CorrelationContextSdk implements CorrelationContext {
 
   // TODO: Migrate to AutoValue.Builder
   // @AutoValue.Builder
-  static class Builder implements CorrelationContext.Builder {
+  static class Builder implements Baggage.Builder {
-    @Nullable private CorrelationContext parent;
+    @Nullable private Baggage parent;
     private boolean noImplicitParent;
     private final Map<String, Entry> entries;
 
-    /** Create a new empty CorrelationContext builder. */
+    /** Create a new empty Baggage builder. */
     Builder() {
       this.entries = new HashMap<>();
     }
 
     @Override
-    public CorrelationContext.Builder setParent(CorrelationContext parent) {
+    public Baggage.Builder setParent(Baggage parent) {
       this.parent = Objects.requireNonNull(parent, "parent");
       return this;
     }
 
     @Override
-    public CorrelationContext.Builder setParent(Context context) {
+    public Baggage.Builder setParent(Context context) {
       Objects.requireNonNull(context, "context");
-      setParent(CorrelationsContextUtils.getCorrelationContext(context));
+      setParent(BaggageUtils.getBaggage(context));
       return this;
     }
 
     @Override
-    public CorrelationContext.Builder setNoParent() {
+    public Baggage.Builder setNoParent() {
       this.parent = null;
       noImplicitParent = true;
       return this;
     }
 
     @Override
-    public CorrelationContext.Builder put(String key, String value, EntryMetadata entryMetadata) {
+    public Baggage.Builder put(String key, String value, EntryMetadata entryMetadata) {
       entries.put(
           Objects.requireNonNull(key, "key"),
           Entry.create(
@@ -151,7 +151,7 @@ class CorrelationContextSdk implements CorrelationContext {
     }
 
     @Override
-    public CorrelationContext.Builder remove(String key) {
+    public Baggage.Builder remove(String key) {
       entries.remove(Objects.requireNonNull(key, "key"));
       if (parent != null && parent.getEntryValue(key) != null) {
         entries.put(key, null);
@@ -160,11 +160,11 @@ class CorrelationContextSdk implements CorrelationContext {
     }
 
     @Override
-    public CorrelationContextSdk build() {
+    public BaggageSdk build() {
       if (parent == null && !noImplicitParent) {
-        parent = OpenTelemetry.getCorrelationContextManager().getCurrentContext();
+        parent = OpenTelemetry.getBaggageManager().getCurrentBaggage();
       }
-      return new CorrelationContextSdk(entries, parent);
+      return new BaggageSdk(entries, parent);
     }
   }
 }

sdk/baggage/src/main/java/io/opentelemetry/sdk/baggage/spi/BaggageManagerFactorySdk.java

@@ -14,23 +14,22 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext.spi;
+package io.opentelemetry.sdk.baggage.spi;
 
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
+import io.opentelemetry.baggage.BaggageManager;
-import io.opentelemetry.correlationcontext.spi.CorrelationContextManagerFactory;
+import io.opentelemetry.baggage.spi.BaggageManagerFactory;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 
 /**
- * {@code CorrelationContextManager} provider implementation for {@link
+ * {@code BaggageManager} provider implementation for {@link BaggageManagerFactory}.
- * CorrelationContextManagerFactory}.
  *
  * <p>This class is not intended to be used in application code and it is used only by {@link
  * io.opentelemetry.OpenTelemetry}.
  */
-public final class CorrelationContextManagerFactorySdk implements CorrelationContextManagerFactory {
+public final class BaggageManagerFactorySdk implements BaggageManagerFactory {
 
   @Override
-  public CorrelationContextManager create() {
+  public BaggageManager create() {
-    return new CorrelationContextManagerSdk();
+    return new BaggageManagerSdk();
   }
 }

sdk/baggage/src/main/resources/META-INF/services/io.opentelemetry.baggage.spi.BaggageManagerFactory

@@ -0,0 +1 @@
+io.opentelemetry.sdk.baggage.spi.BaggageManagerFactorySdk

sdk/baggage/src/test/java/io/opentelemetry/sdk/baggage/BaggageManagerSdkTest.java

@@ -14,27 +14,27 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext;
+package io.opentelemetry.sdk.baggage;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.grpc.Context;
+import io.opentelemetry.baggage.Baggage;
+import io.opentelemetry.baggage.BaggageUtils;
+import io.opentelemetry.baggage.EmptyBaggage;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.correlationcontext.CorrelationContext;
-import io.opentelemetry.correlationcontext.CorrelationsContextUtils;
-import io.opentelemetry.correlationcontext.EmptyCorrelationContext;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-/** Unit tests for {@link CorrelationContextManagerSdk}. */
+/** Unit tests for {@link BaggageManagerSdk}. */
 // Need to suppress warnings for MustBeClosed because Android 14 does not support
 // try-with-resources.
 @SuppressWarnings("MustBeClosedChecker")
-class CorrelationContextManagerSdkTest {
+class BaggageManagerSdkTest {
-  @Mock private CorrelationContext distContext;
+  @Mock private Baggage distContext;
-  private final CorrelationContextManagerSdk contextManager = new CorrelationContextManagerSdk();
+  private final BaggageManagerSdk contextManager = new BaggageManagerSdk();
 
   @BeforeEach
   void setUp() {
@@ -43,15 +43,14 @@ class CorrelationContextManagerSdkTest {
 
   @Test
   void testGetCurrentContext_DefaultContext() {
-    assertThat(contextManager.getCurrentContext()).isSameAs(EmptyCorrelationContext.getInstance());
+    assertThat(contextManager.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
   }
 
   @Test
   void testGetCurrentContext_ContextSetToNull() {
-    Context orig =
+    Context orig = BaggageUtils.withBaggage(null, Context.current()).attach();
-        CorrelationsContextUtils.withCorrelationContext(null, Context.current()).attach();
     try {
-      CorrelationContext distContext = contextManager.getCurrentContext();
+      Baggage distContext = contextManager.getCurrentBaggage();
       assertThat(distContext).isNotNull();
       assertThat(distContext.getEntries()).isEmpty();
     } finally {
@@ -60,28 +59,28 @@ class CorrelationContextManagerSdkTest {
   }
 
   @Test
-  void testWithCorrelationContext() {
+  void testWithBaggage() {
-    assertThat(contextManager.getCurrentContext()).isSameAs(EmptyCorrelationContext.getInstance());
+    assertThat(contextManager.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
     try (Scope wtm = contextManager.withContext(distContext)) {
-      assertThat(contextManager.getCurrentContext()).isSameAs(distContext);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(distContext);
     }
-    assertThat(contextManager.getCurrentContext()).isSameAs(EmptyCorrelationContext.getInstance());
+    assertThat(contextManager.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
   }
 
   @Test
-  void testWithCorrelationContextUsingWrap() {
+  void testWithBaggageUsingWrap() {
     Runnable runnable;
     try (Scope wtm = contextManager.withContext(distContext)) {
-      assertThat(contextManager.getCurrentContext()).isSameAs(distContext);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(distContext);
       runnable =
           Context.current()
               .wrap(
                   () -> {
-                    assertThat(contextManager.getCurrentContext()).isSameAs(distContext);
+                    assertThat(contextManager.getCurrentBaggage()).isSameAs(distContext);
                   });
     }
-    assertThat(contextManager.getCurrentContext()).isSameAs(EmptyCorrelationContext.getInstance());
+    assertThat(contextManager.getCurrentBaggage()).isSameAs(EmptyBaggage.getInstance());
-    // When we run the runnable we will have the CorrelationContext in the current Context.
+    // When we run the runnable we will have the Baggage in the current Context.
     runnable.run();
   }
 }

sdk/baggage/src/test/java/io/opentelemetry/sdk/baggage/BaggageSdkTest.java

@@ -14,30 +14,29 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext;
+package io.opentelemetry.sdk.baggage;
 
-import static io.opentelemetry.sdk.correlationcontext.CorrelationContextTestUtil.listToCorrelationContext;
+import static io.opentelemetry.sdk.baggage.BaggageTestUtil.listToBaggage;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import com.google.common.testing.EqualsTester;
 import io.grpc.Context;
+import io.opentelemetry.baggage.Baggage;
+import io.opentelemetry.baggage.BaggageManager;
+import io.opentelemetry.baggage.BaggageUtils;
+import io.opentelemetry.baggage.Entry;
+import io.opentelemetry.baggage.EntryMetadata;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.correlationcontext.CorrelationContext;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
-import io.opentelemetry.correlationcontext.CorrelationsContextUtils;
-import io.opentelemetry.correlationcontext.Entry;
-import io.opentelemetry.correlationcontext.EntryMetadata;
 import org.junit.jupiter.api.Test;
 
 /**
- * Tests for {@link CorrelationContextSdk} and {@link CorrelationContextSdk.Builder}.
+ * Tests for {@link BaggageSdk} and {@link BaggageSdk.Builder}.
  *
- * <p>Tests for scope management with {@link CorrelationContextManagerSdk} are in {@link
+ * <p>Tests for scope management with {@link BaggageManagerSdk} are in {@link ScopedBaggageTest}.
- * ScopedCorrelationContextTest}.
  */
-class CorrelationContextSdkTest {
+class BaggageSdkTest {
-  private final CorrelationContextManager contextManager = new CorrelationContextManagerSdk();
+  private final BaggageManager contextManager = new BaggageManagerSdk();
 
   private static final EntryMetadata TMD =
       EntryMetadata.create(EntryMetadata.EntryTtl.UNLIMITED_PROPAGATION);
@@ -53,23 +52,23 @@ class CorrelationContextSdkTest {
 
   @Test
   void getEntries_empty() {
-    CorrelationContextSdk distContext = new CorrelationContextSdk.Builder().build();
+    BaggageSdk distContext = new BaggageSdk.Builder().build();
     assertThat(distContext.getEntries()).isEmpty();
   }
 
   @Test
   void getEntries_nonEmpty() {
-    CorrelationContextSdk distContext = listToCorrelationContext(T1, T2);
+    BaggageSdk distContext = listToBaggage(T1, T2);
     assertThat(distContext.getEntries()).containsExactly(T1, T2);
   }
 
   @Test
   void getEntries_chain() {
     Entry t1alt = Entry.create(K1, V2, TMD);
-    CorrelationContextSdk parent = listToCorrelationContext(T1, T2);
+    BaggageSdk parent = listToBaggage(T1, T2);
-    CorrelationContext distContext =
+    Baggage distContext =
         contextManager
-            .contextBuilder()
+            .baggageBuilder()
             .setParent(parent)
             .put(t1alt.getKey(), t1alt.getValue(), t1alt.getEntryMetadata())
             .build();
@@ -78,10 +77,10 @@ class CorrelationContextSdkTest {
 
   @Test
   void put_newKey() {
-    CorrelationContextSdk distContext = listToCorrelationContext(T1);
+    BaggageSdk distContext = listToBaggage(T1);
     assertThat(
             contextManager
-                .contextBuilder()
+                .baggageBuilder()
                 .setParent(distContext)
                 .put(K2, V2, TMD)
                 .build()
@@ -91,10 +90,10 @@ class CorrelationContextSdkTest {
 
   @Test
   void put_existingKey() {
-    CorrelationContextSdk distContext = listToCorrelationContext(T1);
+    BaggageSdk distContext = listToBaggage(T1);
     assertThat(
             contextManager
-                .contextBuilder()
+                .baggageBuilder()
                 .setParent(distContext)
                 .put(K1, V2, TMD)
                 .build()
@@ -104,71 +103,61 @@ class CorrelationContextSdkTest {
 
   @Test
   void put_nullKey() {
-    CorrelationContextSdk distContext = listToCorrelationContext(T1);
+    BaggageSdk distContext = listToBaggage(T1);
-    CorrelationContext.Builder builder = contextManager.contextBuilder().setParent(distContext);
+    Baggage.Builder builder = contextManager.baggageBuilder().setParent(distContext);
     assertThrows(NullPointerException.class, () -> builder.put(null, V2, TMD), "key");
   }
 
   @Test
   void put_nullValue() {
-    CorrelationContextSdk distContext = listToCorrelationContext(T1);
+    BaggageSdk distContext = listToBaggage(T1);
-    CorrelationContext.Builder builder = contextManager.contextBuilder().setParent(distContext);
+    Baggage.Builder builder = contextManager.baggageBuilder().setParent(distContext);
     assertThrows(NullPointerException.class, () -> builder.put(K2, null, TMD), "value");
   }
 
   @Test
   void setParent_nullValue() {
-    CorrelationContextSdk parent = listToCorrelationContext(T1);
+    BaggageSdk parent = listToBaggage(T1);
     assertThrows(
         NullPointerException.class,
-        () ->
+        () -> contextManager.baggageBuilder().setParent(parent).setParent((Baggage) null).build());
-            contextManager
-                .contextBuilder()
-                .setParent(parent)
-                .setParent((CorrelationContext) null)
-                .build());
   }
 
   @Test
   void setParent_nullContext() {
     assertThrows(
         NullPointerException.class,
-        () -> contextManager.contextBuilder().setParent((Context) null));
+        () -> contextManager.baggageBuilder().setParent((Context) null));
   }
 
   @Test
   void setParent_fromContext() {
-    CorrelationContextSdk parent = listToCorrelationContext(T1);
+    BaggageSdk parent = listToBaggage(T1);
-    Context context =
+    Context context = BaggageUtils.withBaggage(listToBaggage(T2), Context.current());
-        CorrelationsContextUtils.withCorrelationContext(
+    Baggage baggage = contextManager.baggageBuilder().setParent(parent).setParent(context).build();
-            listToCorrelationContext(T2), Context.current());
+    assertThat(baggage.getEntries()).containsExactly(T2);
-    CorrelationContext corrContext =
-        contextManager.contextBuilder().setParent(parent).setParent(context).build();
-    assertThat(corrContext.getEntries()).containsExactly(T2);
   }
 
   @Test
   void setParent_fromEmptyContext() {
     Context emptyContext = Context.current();
-    CorrelationContextSdk parent = listToCorrelationContext(T1);
+    BaggageSdk parent = listToBaggage(T1);
-    try (Scope scope = CorrelationsContextUtils.currentContextWith(parent)) {
+    try (Scope scope = BaggageUtils.currentContextWith(parent)) {
-      CorrelationContext corrContext =
+      Baggage baggage = contextManager.baggageBuilder().setParent(emptyContext).build();
-          contextManager.contextBuilder().setParent(emptyContext).build();
+      assertThat(baggage.getEntries()).isEmpty();
-      assertThat(corrContext.getEntries()).isEmpty();
     }
   }
 
   @Test
   void setParent_setNoParent() {
-    CorrelationContextSdk parent = listToCorrelationContext(T1);
+    BaggageSdk parent = listToBaggage(T1);
-    CorrelationContext distContext =
+    Baggage distContext = contextManager.baggageBuilder().setParent(parent).setNoParent().build();
-        contextManager.contextBuilder().setParent(parent).setNoParent().build();
     assertThat(distContext.getEntries()).isEmpty();
   }
 
   @Test
   void remove_existingKey() {
-    CorrelationContextSdk.Builder builder = new CorrelationContextSdk.Builder();
+    BaggageSdk.Builder builder = new BaggageSdk.Builder();
     builder.put(T1.getKey(), T1.getValue(), T1.getEntryMetadata());
     builder.put(T2.getKey(), T2.getValue(), T2.getEntryMetadata());
 
@@ -177,7 +166,7 @@ class CorrelationContextSdkTest {
 
   @Test
   void remove_differentKey() {
-    CorrelationContextSdk.Builder builder = new CorrelationContextSdk.Builder();
+    BaggageSdk.Builder builder = new BaggageSdk.Builder();
     builder.put(T1.getKey(), T1.getValue(), T1.getEntryMetadata());
     builder.put(T2.getKey(), T2.getValue(), T2.getEntryMetadata());
 
@@ -186,15 +175,15 @@ class CorrelationContextSdkTest {
 
   @Test
   void remove_keyFromParent() {
-    CorrelationContextSdk distContext = listToCorrelationContext(T1, T2);
+    BaggageSdk distContext = listToBaggage(T1, T2);
     assertThat(
-            contextManager.contextBuilder().setParent(distContext).remove(K1).build().getEntries())
+            contextManager.baggageBuilder().setParent(distContext).remove(K1).build().getEntries())
         .containsExactly(T2);
   }
 
   @Test
   void remove_nullKey() {
-    CorrelationContext.Builder builder = contextManager.contextBuilder();
+    Baggage.Builder builder = contextManager.baggageBuilder();
     assertThrows(NullPointerException.class, () -> builder.remove(null), "key");
   }
 
@@ -202,11 +191,11 @@ class CorrelationContextSdkTest {
   void testEquals() {
     new EqualsTester()
         .addEqualityGroup(
-            contextManager.contextBuilder().put(K1, V1, TMD).put(K2, V2, TMD).build(),
+            contextManager.baggageBuilder().put(K1, V1, TMD).put(K2, V2, TMD).build(),
-            contextManager.contextBuilder().put(K1, V1, TMD).put(K2, V2, TMD).build(),
+            contextManager.baggageBuilder().put(K1, V1, TMD).put(K2, V2, TMD).build(),
-            contextManager.contextBuilder().put(K2, V2, TMD).put(K1, V1, TMD).build())
+            contextManager.baggageBuilder().put(K2, V2, TMD).put(K1, V1, TMD).build())
-        .addEqualityGroup(contextManager.contextBuilder().put(K1, V1, TMD).put(K2, V1, TMD).build())
+        .addEqualityGroup(contextManager.baggageBuilder().put(K1, V1, TMD).put(K2, V1, TMD).build())
-        .addEqualityGroup(contextManager.contextBuilder().put(K1, V2, TMD).put(K2, V1, TMD).build())
+        .addEqualityGroup(contextManager.baggageBuilder().put(K1, V2, TMD).put(K2, V1, TMD).build())
         .testEquals();
   }
 }

sdk/baggage/src/test/java/io/opentelemetry/sdk/baggage/BaggageTestUtil.java

@@ -14,25 +14,25 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext;
+package io.opentelemetry.sdk.baggage;
 
-import io.opentelemetry.correlationcontext.Entry;
+import io.opentelemetry.baggage.Entry;
 import java.util.Arrays;
 import java.util.List;
 
-class CorrelationContextTestUtil {
+class BaggageTestUtil {
 
-  static CorrelationContextSdk listToCorrelationContext(Entry... entries) {
+  static BaggageSdk listToBaggage(Entry... entries) {
-    return listToCorrelationContext(Arrays.asList(entries));
+    return listToBaggage(Arrays.asList(entries));
   }
 
-  static CorrelationContextSdk listToCorrelationContext(List<Entry> entries) {
+  static BaggageSdk listToBaggage(List<Entry> entries) {
-    CorrelationContextSdk.Builder builder = new CorrelationContextSdk.Builder();
+    BaggageSdk.Builder builder = new BaggageSdk.Builder();
     for (Entry entry : entries) {
       builder.put(entry.getKey(), entry.getValue(), entry.getEntryMetadata());
     }
     return builder.build();
   }
 
-  private CorrelationContextTestUtil() {}
+  private BaggageTestUtil() {}
 }

sdk/baggage/src/test/java/io/opentelemetry/sdk/baggage/ScopedBaggageTest.java

@@ -14,23 +14,23 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext;
+package io.opentelemetry.sdk.baggage;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+import io.opentelemetry.baggage.Baggage;
+import io.opentelemetry.baggage.BaggageManager;
+import io.opentelemetry.baggage.EmptyBaggage;
+import io.opentelemetry.baggage.Entry;
+import io.opentelemetry.baggage.EntryMetadata;
 import io.opentelemetry.context.Scope;
-import io.opentelemetry.correlationcontext.CorrelationContext;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
-import io.opentelemetry.correlationcontext.EmptyCorrelationContext;
-import io.opentelemetry.correlationcontext.Entry;
-import io.opentelemetry.correlationcontext.EntryMetadata;
 import org.junit.jupiter.api.Test;
 
 /**
- * Unit tests for the methods in {@link CorrelationContextManagerSdk} and {@link
+ * Unit tests for the methods in {@link BaggageManagerSdk} and {@link BaggageSdk.Builder} that
- * CorrelationContextSdk.Builder} that interact with the current {@link CorrelationContextSdk}.
+ * interact with the current {@link BaggageSdk}.
  */
-class ScopedCorrelationContextTest {
+class ScopedBaggageTest {
   private static final String KEY_1 = "key 1";
   private static final String KEY_2 = "key 2";
   private static final String KEY_3 = "key 3";
@@ -45,120 +45,120 @@ class ScopedCorrelationContextTest {
   private static final EntryMetadata METADATA_NO_PROPAGATION =
       EntryMetadata.create(EntryMetadata.EntryTtl.NO_PROPAGATION);
 
-  private final CorrelationContextManager contextManager = new CorrelationContextManagerSdk();
+  private final BaggageManager contextManager = new BaggageManagerSdk();
 
   @Test
-  void emptyCorrelationContext() {
+  void emptyBaggage() {
-    CorrelationContext defaultCorrelationContext = contextManager.getCurrentContext();
+    Baggage defaultBaggage = contextManager.getCurrentBaggage();
-    assertThat(defaultCorrelationContext.getEntries()).isEmpty();
+    assertThat(defaultBaggage.getEntries()).isEmpty();
-    assertThat(defaultCorrelationContext).isInstanceOf(EmptyCorrelationContext.class);
+    assertThat(defaultBaggage).isInstanceOf(EmptyBaggage.class);
   }
 
   @Test
   void withContext() {
-    assertThat(contextManager.getCurrentContext().getEntries()).isEmpty();
+    assertThat(contextManager.getCurrentBaggage().getEntries()).isEmpty();
-    CorrelationContext scopedEntries =
+    Baggage scopedEntries =
-        contextManager.contextBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
+        contextManager.baggageBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
     try (Scope scope = contextManager.withContext(scopedEntries)) {
-      assertThat(contextManager.getCurrentContext()).isSameAs(scopedEntries);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(scopedEntries);
     }
-    assertThat(contextManager.getCurrentContext().getEntries()).isEmpty();
+    assertThat(contextManager.getCurrentBaggage().getEntries()).isEmpty();
   }
 
   @Test
   void createBuilderFromCurrentEntries() {
-    CorrelationContext scopedDistContext =
+    Baggage scopedDistContext =
-        contextManager.contextBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
+        contextManager.baggageBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
     try (Scope scope = contextManager.withContext(scopedDistContext)) {
-      CorrelationContext newEntries =
+      Baggage newEntries =
           contextManager
-              .contextBuilder()
+              .baggageBuilder()
               .put(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION)
               .build();
       assertThat(newEntries.getEntries())
           .containsExactlyInAnyOrder(
               Entry.create(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION),
               Entry.create(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION));
-      assertThat(contextManager.getCurrentContext()).isSameAs(scopedDistContext);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(scopedDistContext);
     }
   }
 
   @Test
   void setCurrentEntriesWithBuilder() {
-    assertThat(contextManager.getCurrentContext().getEntries()).isEmpty();
+    assertThat(contextManager.getCurrentBaggage().getEntries()).isEmpty();
-    CorrelationContext scopedDistContext =
+    Baggage scopedDistContext =
-        contextManager.contextBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
+        contextManager.baggageBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
     try (Scope scope = contextManager.withContext(scopedDistContext)) {
-      assertThat(contextManager.getCurrentContext().getEntries())
+      assertThat(contextManager.getCurrentBaggage().getEntries())
           .containsExactly(Entry.create(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION));
-      assertThat(contextManager.getCurrentContext()).isSameAs(scopedDistContext);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(scopedDistContext);
     }
-    assertThat(contextManager.getCurrentContext().getEntries()).isEmpty();
+    assertThat(contextManager.getCurrentBaggage().getEntries()).isEmpty();
   }
 
   @Test
   void addToCurrentEntriesWithBuilder() {
-    CorrelationContext scopedDistContext =
+    Baggage scopedDistContext =
-        contextManager.contextBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
+        contextManager.baggageBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
     try (Scope scope1 = contextManager.withContext(scopedDistContext)) {
-      CorrelationContext innerDistContext =
+      Baggage innerDistContext =
           contextManager
-              .contextBuilder()
+              .baggageBuilder()
               .put(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION)
               .build();
       try (Scope scope2 = contextManager.withContext(innerDistContext)) {
-        assertThat(contextManager.getCurrentContext().getEntries())
+        assertThat(contextManager.getCurrentBaggage().getEntries())
             .containsExactlyInAnyOrder(
                 Entry.create(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION),
                 Entry.create(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION));
-        assertThat(contextManager.getCurrentContext()).isSameAs(innerDistContext);
+        assertThat(contextManager.getCurrentBaggage()).isSameAs(innerDistContext);
       }
-      assertThat(contextManager.getCurrentContext()).isSameAs(scopedDistContext);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(scopedDistContext);
     }
   }
 
   @Test
-  void multiScopeCorrelationContextWithMetadata() {
+  void multiScopeBaggageWithMetadata() {
-    CorrelationContext scopedDistContext =
+    Baggage scopedDistContext =
         contextManager
-            .contextBuilder()
+            .baggageBuilder()
             .put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION)
             .put(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION)
             .build();
     try (Scope scope1 = contextManager.withContext(scopedDistContext)) {
-      CorrelationContext innerDistContext =
+      Baggage innerDistContext =
           contextManager
-              .contextBuilder()
+              .baggageBuilder()
               .put(KEY_3, VALUE_3, METADATA_NO_PROPAGATION)
               .put(KEY_2, VALUE_4, METADATA_NO_PROPAGATION)
               .build();
       try (Scope scope2 = contextManager.withContext(innerDistContext)) {
-        assertThat(contextManager.getCurrentContext().getEntries())
+        assertThat(contextManager.getCurrentBaggage().getEntries())
             .containsExactlyInAnyOrder(
                 Entry.create(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION),
                 Entry.create(KEY_2, VALUE_4, METADATA_NO_PROPAGATION),
                 Entry.create(KEY_3, VALUE_3, METADATA_NO_PROPAGATION));
-        assertThat(contextManager.getCurrentContext()).isSameAs(innerDistContext);
+        assertThat(contextManager.getCurrentBaggage()).isSameAs(innerDistContext);
       }
-      assertThat(contextManager.getCurrentContext()).isSameAs(scopedDistContext);
+      assertThat(contextManager.getCurrentBaggage()).isSameAs(scopedDistContext);
     }
   }
 
   @Test
   void setNoParent_doesNotInheritContext() {
-    assertThat(contextManager.getCurrentContext().getEntries()).isEmpty();
+    assertThat(contextManager.getCurrentBaggage().getEntries()).isEmpty();
-    CorrelationContext scopedDistContext =
+    Baggage scopedDistContext =
-        contextManager.contextBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
+        contextManager.baggageBuilder().put(KEY_1, VALUE_1, METADATA_UNLIMITED_PROPAGATION).build();
     try (Scope scope = contextManager.withContext(scopedDistContext)) {
-      CorrelationContext innerDistContext =
+      Baggage innerDistContext =
           contextManager
-              .contextBuilder()
+              .baggageBuilder()
               .setNoParent()
               .put(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION)
               .build();
       assertThat(innerDistContext.getEntries())
           .containsExactly(Entry.create(KEY_2, VALUE_2, METADATA_UNLIMITED_PROPAGATION));
     }
-    assertThat(contextManager.getCurrentContext().getEntries()).isEmpty();
+    assertThat(contextManager.getCurrentBaggage().getEntries()).isEmpty();
   }
 }

sdk/baggage/src/test/java/io/opentelemetry/sdk/baggage/spi/BaggageManagerFactorySdkTest.java

@@ -14,19 +14,18 @@
  * limitations under the License.
  */
 
-package io.opentelemetry.sdk.correlationcontext.spi;
+package io.opentelemetry.sdk.baggage.spi;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 import io.opentelemetry.OpenTelemetry;
-import io.opentelemetry.sdk.correlationcontext.CorrelationContextManagerSdk;
+import io.opentelemetry.sdk.baggage.BaggageManagerSdk;
 import org.junit.jupiter.api.Test;
 
-class CorrelationContextManagerFactorySdkTest {
+class BaggageManagerFactorySdkTest {
 
   @Test
   void testDefault() {
-    assertThat(OpenTelemetry.getCorrelationContextManager())
+    assertThat(OpenTelemetry.getBaggageManager()).isInstanceOf(BaggageManagerSdk.class);
-        .isInstanceOf(CorrelationContextManagerSdk.class);
   }
 }

sdk/correlation_context/src/main/java/io/opentelemetry/sdk/correlationcontext/CorrelationContextManagerSdk.java

@@ -1,43 +0,0 @@
-/*
- * Copyright 2019, OpenTelemetry Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.opentelemetry.sdk.correlationcontext;
-
-import io.opentelemetry.context.Scope;
-import io.opentelemetry.correlationcontext.CorrelationContext;
-import io.opentelemetry.correlationcontext.CorrelationContextManager;
-import io.opentelemetry.correlationcontext.CorrelationsContextUtils;
-
-/**
- * {@link CorrelationContextManagerSdk} is SDK implementation of {@link CorrelationContextManager}.
- */
-public class CorrelationContextManagerSdk implements CorrelationContextManager {
-
-  @Override
-  public CorrelationContext getCurrentContext() {
-    return CorrelationsContextUtils.getCurrentCorrelationContext();
-  }
-
-  @Override
-  public CorrelationContext.Builder contextBuilder() {
-    return new CorrelationContextSdk.Builder();
-  }
-
-  @Override
-  public Scope withContext(CorrelationContext distContext) {
-    return CorrelationsContextUtils.currentContextWith(distContext);
-  }
-}

sdk/correlation_context/src/main/resources/META-INF/services/io.opentelemetry.correlationcontext.spi.CorrelationContextManagerFactory

@@ -1 +0,0 @@
-io.opentelemetry.sdk.correlationcontext.spi.CorrelationContextManagerFactorySdk

settings.gradle

@@ -35,8 +35,8 @@ include ":opentelemetry-all",
         ":opentelemetry-integration-tests-tracecontext",
         ":opentelemetry-opentracing-shim",
         ":opentelemetry-proto",
+        ":opentelemetry-sdk-baggage",
         ":opentelemetry-sdk-common",
-        ":opentelemetry-sdk-correlation-context",
         ":opentelemetry-sdk-metrics",
         ":opentelemetry-sdk-tracing",
         ":opentelemetry-sdk",
@@ -53,14 +53,14 @@ include ":opentelemetry-all",
 
 rootProject.children.each {
     it.projectDir = "$rootDir/" + it.name
-        .replace("opentelemetry-integration-tests-", "integration_tests/")
+            .replace("opentelemetry-integration-tests-", "integration_tests/")
-        .replace("opentelemetry-exporters-", "exporters/")
+            .replace("opentelemetry-exporters-", "exporters/")
-        .replace("opentelemetry-extension-", "extensions/")
+            .replace("opentelemetry-extension-", "extensions/")
-        .replace("opentelemetry-sdk-extension-", "sdk_extensions/")
+            .replace("opentelemetry-sdk-extension-", "sdk_extensions/")
-        .replace("opentelemetry-sdk-", "sdk/")
+            .replace("opentelemetry-sdk-", "sdk/")
-        .replace("logging-", "logging/")
+            .replace("logging-", "logging/")
-        .replace("opentelemetry-", "")
+            .replace("opentelemetry-", "")
-        .replace("-", "_") as File
+            .replace("-", "_") as File
 }
 
 project(":opentelemetry-sdk").projectDir = "$rootDir/sdk/all" as File