Extract GCPMetadataConfig into support library

Author: psx95

detectors/resources-support/build.gradle

@@ -13,21 +13,15 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-plugins {
-	id 'java'
-}
-
-group 'org.example'
-
-repositories {
-	mavenCentral()
-}
+description = 'Support library for Google Cloud Resource Detector'
 
 dependencies {
 	testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
 	testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
 }
 
-test {
-	useJUnitPlatform()
+afterEvaluate {
+	tasks.named("compileJava"){
+		options.release = 8
+	}
 }

detectors/resources/src/main/java/com/google/cloud/opentelemetry/detectors/GCPMetadataConfig.java renamed to detectors/resources-support/src/main/java/com/google/cloud/opentelemetry/detectors/GCPMetadataConfig.java

@@ -43,18 +43,18 @@ public GCPMetadataConfig(String url) {
     this.url = url;
   }
 
-  boolean isRunningOnGcp() {
+  public boolean isRunningOnGcp() {
     return getProjectId() != null && !getProjectId().isEmpty();
   }
 
   // Returns null on failure to retrieve from metadata server
-  String getProjectId() {
+  public String getProjectId() {
     return getAttribute("project/project-id");
   }
 
   // Example response: projects/640212054955/zones/australia-southeast1-a
   // Returns null on failure to retrieve from metadata server
-  String getZone() {
+  public String getZone() {
     String zone = getAttribute("instance/zone");
     if (zone != null && zone.contains("/")) {
       zone = zone.substring(zone.lastIndexOf('/') + 1);
@@ -66,7 +66,7 @@ String getZone() {
   // method involve detecting region in GAE standard environment
   // Example response: projects/5689182099321/regions/us-central1
   // Returns null on failure to retrieve from metadata server
-  String getRegion() {
+  public String getRegion() {
     String region = getAttribute("instance/region");
     if (region != null && region.contains("/")) {
       region = region.substring(region.lastIndexOf('/') + 1);
@@ -75,7 +75,7 @@ String getRegion() {
   }
 
   // Example response: projects/640212054955/machineTypes/e2-medium
-  String getMachineType() {
+  public String getMachineType() {
     String machineType = getAttribute("instance/machine-type");
     if (machineType != null && machineType.contains("/")) {
       machineType = machineType.substring(machineType.lastIndexOf('/') + 1);
@@ -84,27 +84,27 @@ String getMachineType() {
   }
 
   // Returns null on failure to retrieve from metadata server
-  String getInstanceId() {
+  public String getInstanceId() {
     return getAttribute("instance/id");
   }
 
   // Returns null on failure to retrieve from metadata server
-  String getClusterName() {
+  public String getClusterName() {
     return getAttribute("instance/attributes/cluster-name");
   }
 
   // Returns null on failure to retrieve from metadata server
-  String getClusterLocation() {
+  public String getClusterLocation() {
     return getAttribute("instance/attributes/cluster-location");
   }
 
   // Returns null on failure to retrieve from metadata server
-  String getInstanceHostName() {
+  public String getInstanceHostName() {
     return getAttribute("instance/hostname");
   }
 
   // Returns null on failure to retrieve from metadata server
-  String getInstanceName() {
+  public String getInstanceName() {
     return getAttribute("instance/name");
   }
 

detectors/resources-support/src/main/java/com/google/cloud/opentelemetry/detectors/Main.java

@@ -27,6 +27,7 @@ dependencies {
 	implementation(libraries.opentelemetry_sdk_autoconf)
 	implementation(libraries.opentelemetry_semconv)
 	implementation platform(libraries.opentelemetry_bom)
+	implementation project(':detector-resources-support')
 	testImplementation(testLibraries.assertj)
 	testImplementation(testLibraries.junit)
 	testImplementation(testLibraries.wiremock)