Support process.runtime.* resource attributes (#2143)

* Support process.runtime.* resource attributes

* Code review comments

* Add process.runtime.* attributes to README.md

sdk-extensions/resources/README.md

@@ -19,13 +19,24 @@ Implemented attributes:
 
 Implementation: `io.opentelemetry.sdk.extension.resources.ProcessResource`
 
-Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/semantic_conventions/process.md
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/semantic_conventions/process.md#process
 
 Implemented attributes:
 - `process.pid`
 - `process.executable.path` (note, we assume the `java` binary is located in the `bin` subfolder of `JAVA_HOME`)
 - `process.command_line` (note this includes all system properties and arguments when running)
 
+### Java Runtime
+
+Implementation: `io.opentelemetry.sdk.extension.resources.ProcessRuntimeResource`
+
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/semantic_conventions/process.md#process-runtimes
+
+Implemented attributes:
+- `process.runtime.name`
+- `process.runtime.version`
+- `process.runtime.description`
+
 ## Platforms
 
 This package currently does not run on Android. It has been verified on OpenJDK and should work on

sdk-extensions/resources/src/main/java/io/opentelemetry/sdk/extension/resources/ProcessRuntimeResource.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.sdk.extension.resources;
+
+import static io.opentelemetry.sdk.resources.ResourceAttributes.PROCESS_RUNTIME_DESCRIPTION;
+import static io.opentelemetry.sdk.resources.ResourceAttributes.PROCESS_RUNTIME_NAME;
+import static io.opentelemetry.sdk.resources.ResourceAttributes.PROCESS_RUNTIME_VERSION;
+
+import io.opentelemetry.api.common.Attributes;
+import io.opentelemetry.sdk.resources.ResourceProvider;
+
+/** {@link ResourceProvider} which provides information about the Java runtime. */
+public final class ProcessRuntimeResource extends ResourceProvider {
+  @Override
+  protected Attributes getAttributes() {
+    try {
+      String name = System.getProperty("java.runtime.name");
+      String version = System.getProperty("java.runtime.version");
+      String description =
+          System.getProperty("java.vm.vendor")
+              + " "
+              + System.getProperty("java.vm.name")
+              + " "
+              + System.getProperty("java.vm.version");
+
+      return Attributes.of(
+          PROCESS_RUNTIME_NAME,
+          name,
+          PROCESS_RUNTIME_VERSION,
+          version,
+          PROCESS_RUNTIME_DESCRIPTION,
+          description);
+    } catch (SecurityException ignored) {
+      return Attributes.empty();
+    }
+  }
+}

sdk-extensions/resources/src/main/resources/META-INF/services/io.opentelemetry.sdk.resources.ResourceProvider

@@ -1,2 +1,3 @@
 io.opentelemetry.sdk.extension.resources.OsResource
 io.opentelemetry.sdk.extension.resources.ProcessResource
+io.opentelemetry.sdk.extension.resources.ProcessRuntimeResource

sdk-extensions/resources/src/test/java/io/opentelemetry/sdk/extension/resources/ProcessRuntimeResourceTest.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.sdk.extension.resources;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import io.opentelemetry.api.common.ReadableAttributes;
+import io.opentelemetry.sdk.resources.Resource;
+import io.opentelemetry.sdk.resources.ResourceAttributes;
+import org.junit.jupiter.api.Test;
+
+class ProcessRuntimeResourceTest {
+  @Test
+  void shouldCreateRuntimeAttributes() {
+    // when
+    ReadableAttributes attributes = new ProcessRuntimeResource().getAttributes();
+
+    // then
+    assertThat(attributes.get(ResourceAttributes.PROCESS_RUNTIME_NAME)).isNotBlank();
+    assertThat(attributes.get(ResourceAttributes.PROCESS_RUNTIME_VERSION)).isNotBlank();
+    assertThat(attributes.get(ResourceAttributes.PROCESS_RUNTIME_DESCRIPTION)).isNotBlank();
+  }
+
+  @Test
+  void inDefault() {
+    // when
+    ReadableAttributes attributes = Resource.getDefault().getAttributes();
+
+    // then
+    assertThat(attributes.get(ResourceAttributes.PROCESS_RUNTIME_NAME)).isNotBlank();
+    assertThat(attributes.get(ResourceAttributes.PROCESS_RUNTIME_VERSION)).isNotBlank();
+    assertThat(attributes.get(ResourceAttributes.PROCESS_RUNTIME_DESCRIPTION)).isNotBlank();
+  }
+}

sdk/common/src/main/java/io/opentelemetry/sdk/resources/ResourceAttributes.java

@@ -51,6 +51,24 @@ public final class ResourceAttributes {
   /** The username of the user that owns the process. */
   public static final AttributeKey<String> PROCESS_OWNER = stringKey("process.owner");
 
+  // TODO: these should be removed once SemanticAttributes contain process.runtime.*
+  /**
+   * The name of the runtime of this process. For compiled native binaries, this SHOULD be the name
+   * of the compiler.
+   */
+  public static final AttributeKey<String> PROCESS_RUNTIME_NAME = stringKey("process.runtime.name");
+  /**
+   * The version of the runtime of this process, as returned by the runtime without modification.
+   */
+  public static final AttributeKey<String> PROCESS_RUNTIME_VERSION =
+      stringKey("process.runtime.version");
+  /**
+   * An additional description about the runtime of the process, for example a specific vendor
+   * customization of the runtime environment.
+   */
+  public static final AttributeKey<String> PROCESS_RUNTIME_DESCRIPTION =
+      stringKey("process.runtime.description");
+
   /**
    * Logical name of the service. MUST be the same for all instances of horizontally scaled
    * services.