Make the EnvironmentResource public. (#3200)

sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/EnvironmentResource.java

@@ -9,11 +9,23 @@ import io.opentelemetry.api.common.Attributes;
 import io.opentelemetry.api.common.AttributesBuilder;
 import io.opentelemetry.sdk.resources.Resource;
 
-final class EnvironmentResource {
+/**
+ * Factory for a {@link Resource} which parses the standard "otel.resource.attributes" system
+ * property or OTEL_RESOURCE_ATTRIBUTES environment variable.
+ */
+public final class EnvironmentResource {
 
   // Visible for testing
   static final String ATTRIBUTE_PROPERTY = "otel.resource.attributes";
 
+  /**
+   * Returns a {@link Resource} which contains information from the standard
+   * "otel.resource.attributes" system property or OTEL_RESOURCE_ATTRIBUTES environment variable.
+   */
+  public static Resource get() {
+    return create(ConfigProperties.get());
+  }
+
   static Resource create(ConfigProperties config) {
     return Resource.create(getAttributes(config));
   }

sdk-extensions/autoconfigure/src/test/java/io/opentelemetry/sdk/autoconfigure/EnvironmentResourceTest.java

@@ -16,6 +16,11 @@ import org.junit.jupiter.api.Test;
 
 class EnvironmentResourceTest {
 
+  @Test
+  void get() {
+    assertThat(EnvironmentResource.get()).isNotNull();
+  }
+
   @Test
   void resourceFromConfig_empty() {
     Attributes attributes =

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

@@ -12,12 +12,12 @@ import io.opentelemetry.semconv.resource.attributes.ResourceAttributes;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 
-/** Factory of a {@link Resource} which provides information about the host info. */
+/** Factory for a {@link Resource} which provides information about the host info. */
 public final class HostResource {
 
   private static final Resource INSTANCE = buildResource();
 
-  /** Returns a factory for a {@link Resource} which provides information about host. */
+  /** Returns a {@link Resource} which provides information about host. */
   public static Resource get() {
     return INSTANCE;
   }