detect service.name based on build-info.properties

instrumentation/spring/spring-boot-resources/library/src/main/java/io/opentelemetry/instrumentation/spring/resources/SpringBootServiceVersionDetector.java

@@ -11,13 +11,27 @@
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 import io.opentelemetry.sdk.autoconfigure.spi.ResourceProvider;
 import io.opentelemetry.sdk.resources.Resource;
+import io.opentelemetry.sdk.resources.ResourceBuilder;
 import io.opentelemetry.semconv.ResourceAttributes;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.Optional;
 import java.util.Properties;
 import java.util.logging.Logger;
 
+/**
+ * Detects <code>service.name</code> and <code>service.version</code> from Spring Boot's <code>
+ * build-info.properties</code> file.
+ *
+ * <p><Use the following snippet in your gradle file to generate the build-info.properties file:
+ *
+ * <pre>{@code
+ * springBoot {
+ *   buildInfo {
+ *   }
+ * }
+ * }</pre>
+ */
 @AutoService(ResourceProvider.class)
 public class SpringBootServiceVersionDetector implements ResourceProvider {
 
@@ -37,29 +51,41 @@ public SpringBootServiceVersionDetector() {
 
   @Override
   public Resource createResource(ConfigProperties config) {
-    return getServiceVersionFromBuildInfo()
+    return getPropertiesFromBuildInfo()
         .map(
-            version -> {
-              logger.log(FINE, "Auto-detected Spring Boot service version: {0}", version);
-              return Resource.builder().put(ResourceAttributes.SERVICE_VERSION, version).build();
+            properties -> {
+              logger.log(FINE, "Auto-detected Spring Boot service version: {0}", properties);
+              ResourceBuilder builder = Resource.builder();
+
+              String version = properties.getProperty("build.version");
+              if (version != null) {
+                builder.put(ResourceAttributes.SERVICE_VERSION, version);
+              }
+
+              String name = properties.getProperty("build.name");
+              if (name != null) {
+                builder.put(ResourceAttributes.SERVICE_NAME, name);
+              }
+
+              return builder.build();
             })
         .orElseGet(Resource::empty);
   }
 
-  private Optional<String> getServiceVersionFromBuildInfo() {
+  private Optional<Properties> getPropertiesFromBuildInfo() {
     try (InputStream in = system.openClasspathResource("META-INF", "build-info.properties")) {
-      return in != null ? getServiceVersionPropertyFromStream(in) : Optional.empty();
+      return in != null ? getPropertiesFromStream(in) : Optional.empty();
     } catch (Exception e) {
       return Optional.empty();
     }
   }
 
-  private static Optional<String> getServiceVersionPropertyFromStream(InputStream in) {
+  private static Optional<Properties> getPropertiesFromStream(InputStream in) {
     Properties properties = new Properties();
     try {
       // Note: load() uses ISO 8859-1 encoding, same as spring uses by default for property files
       properties.load(in);
-      return Optional.ofNullable(properties.getProperty("build.version"));
+      return Optional.of(properties);
     } catch (IOException e) {
       return Optional.empty();
     }

instrumentation/spring/spring-boot-resources/library/src/test/java/io/opentelemetry/instrumentation/spring/resources/SpringBootServiceVersionDetectorTest.java

@@ -5,6 +5,7 @@
 
 package io.opentelemetry.instrumentation.spring.resources;
 
+import static io.opentelemetry.semconv.ResourceAttributes.SERVICE_NAME;
 import static io.opentelemetry.semconv.ResourceAttributes.SERVICE_VERSION;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.when;
@@ -34,6 +35,7 @@ void givenBuildVersionIsPresentInBuildInfProperties_thenReturnBuildVersion() {
     SpringBootServiceVersionDetector guesser = new SpringBootServiceVersionDetector(system);
     Resource result = guesser.createResource(config);
     assertThat(result.getAttribute(SERVICE_VERSION)).isEqualTo("0.0.2");
+    assertThat(result.getAttribute(SERVICE_NAME)).isEqualTo("some-name");
   }
 
   @Test

instrumentation/spring/spring-boot-resources/library/src/test/resources/build-info.properties

@@ -1,2 +1 @@
 build.artifact=something
-build.name=some-name