Update metrics example with resource detection (#370)

* Add logging exporter to root gradle file

* Udpate dependency declaration

* Add resource detection to metrics sample

* Add safety checks to prevent errors

* Update script to run application in cloud run

Author: psx95

build.gradle

@@ -205,6 +205,7 @@ subprojects {
 			opentelemetry_autoconfigure_spi  : "io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi:${openTelemetryVersion}",
 			opentelemetry_agent_extension    : "io.opentelemetry.javaagent:opentelemetry-javaagent-extension-api:${openTelemetryInstrumentationVersion}-alpha",
 			opentelemetry_otlp_exporter      : "io.opentelemetry:opentelemetry-exporter-otlp:${openTelemetryVersion}",
+			opentelemetry_logging_exporter   : "io.opentelemetry:opentelemetry-exporter-logging:${openTelemetryVersion}",
 			opentelemetry_gcp_resources      : "io.opentelemetry.contrib:opentelemetry-gcp-resources:${openTelemetryContribVersion}-alpha",
 			spring_boot_starter_web          : "org.springframework.boot:spring-boot-starter-web:${springWebVersion}",
 			spring_cloud_starter_openfeign   : "org.springframework.cloud:spring-cloud-starter-openfeign:${springOpenFeignVersion}",

examples/metrics/build.gradle

@@ -35,5 +35,9 @@ dependencies {
 	implementation(libraries.opentelemetry_sdk_metrics)
 	implementation(libraries.google_cloud_monitoring)
 	implementation project(':exporter-metrics')
-	runtimeOnly(libraries.opentelemetry_gcp_resources)
+	implementation(libraries.opentelemetry_gcp_resources)
+	// required by resource detection
+	implementation(libraries.opentelemetry_autoconfigure_spi)
+	// this helps in debugging as it outputs all export to std out
+	implementation(libraries.opentelemetry_logging_exporter)
 }

examples/metrics/run_as_cloud-run-job.sh

@@ -14,39 +14,42 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-CONTAINER_REGISTRY=cloud-run-applications
-REGISTRY_LOCATION=us-central1
+ARTIFACT_REPOSITORY=cloud-run-applications
+JOB_NAME=job-metrics-export
 
-if [[ -z "${GOOGLE_CLOUD_PROJECT}" ]]; then
-  echo "GOOGLE_CLOUD_PROJECT environment variable not set"
-  exit 1
-fi
-
-if [[ -z "${GOOGLE_APPLICATION_CREDENTIALS}" ]]; then
-  echo "GOOGLE_APPLICATION_CREDENTIALS environment variable not set"
-  exit 1
-fi
-
-if [[ -z "${GOOGLE_CLOUD_RUN_REGION}" ]]; then
-  echo "GOOGLE_CLOUD_RUN_REGION environment variable not set"
-  exit 1
-fi
+# Verify necessary environment variables are set
+echo "${GOOGLE_CLOUD_PROJECT:?${UNSET_WARNING}}"
+echo "${GOOGLE_APPLICATION_CREDENTIALS:?${UNSET_WARNING}}"
+echo "${GOOGLE_CLOUD_RUN_REGION:?${UNSET_WARNING}}"
 
 echo "ENVIRONMENT VARIABLES VERIFIED"
 
-echo "CREATING CLOUD ARTIFACT REPOSITORY"
-gcloud artifacts repositories create ${CONTAINER_REGISTRY} --repository-format=docker --location=${REGISTRY_LOCATION} --description="Sample applications to run on Google Cloud Run"
-echo "CREATED ${CONTAINER_REGISTRY} in ${REGISTRY_LOCATION}"
+# Safety check to verify if repository already exists.
+if gcloud artifacts repositories describe ${ARTIFACT_REPOSITORY} \
+  --location="${GOOGLE_CLOUD_RUN_REGION}"
+then
+  echo "Repository ${ARTIFACT_REPOSITORY} already exists."
+else
+  echo "CREATING CLOUD ARTIFACT REPOSITORY"
+  gcloud artifacts repositories create ${ARTIFACT_REPOSITORY} --repository-format=docker --location=${GOOGLE_CLOUD_RUN_REGION} --description="Sample applications to run on Google Cloud Run"
+  echo "CREATED ${ARTIFACT_REPOSITORY} in ${GOOGLE_CLOUD_RUN_REGION}"
+fi
 
 echo "BUILDING SAMPLE APP IMAGE"
-gradle clean jib --image "${REGISTRY_LOCATION}-docker.pkg.dev/${GOOGLE_CLOUD_PROJECT}/${CONTAINER_REGISTRY}/metrics-export-java"
-
-echo "CREATING A CLOUD RUN JOB TO RUN THE CONTAINER"
-gcloud run jobs create job-metrics-export \
-    --image "${REGISTRY_LOCATION}-docker.pkg.dev/${GOOGLE_CLOUD_PROJECT}/${CONTAINER_REGISTRY}/metrics-export-java" \
-    --max-retries 5 \
-    --region ${GOOGLE_CLOUD_RUN_REGION} \
-    --project="${GOOGLE_CLOUD_PROJECT}"
+gradle clean jib --image "${GOOGLE_CLOUD_RUN_REGION}-docker.pkg.dev/${GOOGLE_CLOUD_PROJECT}/${ARTIFACT_REPOSITORY}/metrics-export-java"
+
+# Safety check to verify if the job already exists
+if gcloud run jobs describe ${JOB_NAME} --region="${GOOGLE_CLOUD_RUN_REGION}"
+then
+  echo "Job ${JOB_NAME} already exists"
+else
+  echo "CREATING A CLOUD RUN JOB TO RUN THE CONTAINER"
+  gcloud run jobs create job-metrics-export \
+      --image="${GOOGLE_CLOUD_RUN_REGION}-docker.pkg.dev/${GOOGLE_CLOUD_PROJECT}/${ARTIFACT_REPOSITORY}/metrics-export-java" \
+      --max-retries=5 \
+      --region="${GOOGLE_CLOUD_RUN_REGION}" \
+      --project="${GOOGLE_CLOUD_PROJECT}"
+fi
 
 echo "SETTING CLOUD RUN JOB REGION"
 gcloud config set run/region "${GOOGLE_CLOUD_RUN_REGION}"

examples/metrics/src/main/java/com/google/cloud/opentelemetry/example/metrics/MetricsExporterExample.java

@@ -28,10 +28,14 @@
 import io.grpc.ManagedChannelBuilder;
 import io.opentelemetry.api.metrics.LongCounter;
 import io.opentelemetry.api.metrics.Meter;
+import io.opentelemetry.contrib.gcp.resource.GCPResourceProvider;
+import io.opentelemetry.exporter.logging.LoggingMetricExporter;
 import io.opentelemetry.sdk.metrics.SdkMeterProvider;
 import io.opentelemetry.sdk.metrics.export.MetricExporter;
 import io.opentelemetry.sdk.metrics.export.PeriodicMetricReader;
+import io.opentelemetry.sdk.resources.Resource;
 import java.io.IOException;
+import java.time.Duration;
 import java.util.Random;
 
 public class MetricsExporterExample {
@@ -75,13 +79,20 @@ private static MetricConfiguration generateMetricExporterConfig(boolean useDefau
   }
 
   private static void setupMetricExporter(MetricConfiguration metricConfiguration) {
+    GCPResourceProvider resourceProvider = new GCPResourceProvider();
     MetricExporter metricExporter =
         GoogleCloudMetricExporter.createWithConfiguration(metricConfiguration);
+    MetricExporter metricDebugExporter = LoggingMetricExporter.create();
     METER_PROVIDER =
         SdkMeterProvider.builder()
+            .setResource(Resource.create(resourceProvider.getAttributes()))
             .registerMetricReader(
                 PeriodicMetricReader.builder(metricExporter)
-                    .setInterval(java.time.Duration.ofSeconds(30))
+                    .setInterval(Duration.ofSeconds(30))
+                    .build())
+            .registerMetricReader(
+                PeriodicMetricReader.builder(metricDebugExporter)
+                    .setInterval(Duration.ofSeconds(30))
                     .build())
             .build();
 

examples/spring/build.gradle

@@ -78,7 +78,7 @@ dependencies {
 	// auto exporter makes Google Cloud exporters available to autoconfigure module
 	implementation project(':exporter-auto')
 	// this helps in debugging as it outputs all export to std out
-	implementation 'io.opentelemetry:opentelemetry-exporter-logging:1.33.0'
+	implementation(libraries.opentelemetry_logging_exporter)
 }
 
 test {