fix: allow factory to export to different projects (googleapis#2374)

This fix removed the check on Bigtable project id and gets the BigtableTable resource project id directly from metrics attribute. BigtableDataClientFactory can create one client for multiple projects. Removing the check allows people using BigtableDataClientFactory to export to different projects.

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/BigtableDataSettings.java

@@ -30,6 +30,7 @@
 import com.google.cloud.bigtable.data.v2.stub.BigtableBatchingCallSettings;
 import com.google.cloud.bigtable.data.v2.stub.EnhancedBigtableStubSettings;
 import com.google.cloud.bigtable.data.v2.stub.metrics.MetricsProvider;
+import com.google.cloud.bigtable.data.v2.stub.metrics.NoopMetricsProvider;
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Strings;
 import io.grpc.ManagedChannelBuilder;
@@ -127,6 +128,7 @@ public static Builder newBuilderForEmulator(String hostname, int port) {
         .setEndpoint(hostname + ":" + port)
         // disable channel refreshing when creating an emulator
         .setRefreshingChannel(false)
+        .setMetricsProvider(NoopMetricsProvider.INSTANCE) // disable exporting metrics for emulator
         .setTransportChannelProvider(
             InstantiatingGrpcChannelProvider.newBuilder()
                 .setMaxInboundMessageSize(256 * 1024 * 1024)

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/BigtableClientContext.java

@@ -71,14 +71,9 @@ public static BigtableClientContext create(EnhancedBigtableStubSettings settings
     try {
       // We don't want client side metrics to crash the client, so catch any exception when getting
       // the OTEL instance and log the exception instead.
-      // TODO openTelemetry doesn't need to be tied to a project id. This is incorrect and will be
-      // fixed in the following PR.
       openTelemetry =
           getOpenTelemetryFromMetricsProvider(
-              settings.getProjectId(),
-              settings.getMetricsProvider(),
-              credentials,
-              settings.getMetricsEndpoint());
+              settings.getMetricsProvider(), credentials, settings.getMetricsEndpoint());
     } catch (Throwable t) {
       logger.log(Level.WARNING, "Failed to get OTEL, will skip exporting client side metrics", t);
     }
@@ -144,7 +139,6 @@ public void close() throws Exception {
   }
 
   private static OpenTelemetry getOpenTelemetryFromMetricsProvider(
-      String projectId,
       MetricsProvider metricsProvider,
       @Nullable Credentials defaultCredentials,
       @Nullable String metricsEndpoint)
@@ -159,7 +153,7 @@ private static OpenTelemetry getOpenTelemetryFromMetricsProvider(
               ? BigtableDataSettings.getMetricsCredentials()
               : defaultCredentials;
       DefaultMetricsProvider defaultMetricsProvider = (DefaultMetricsProvider) metricsProvider;
-      return defaultMetricsProvider.getOpenTelemetry(projectId, metricsEndpoint, credentials);
+      return defaultMetricsProvider.getOpenTelemetry(metricsEndpoint, credentials);
     } else if (metricsProvider instanceof NoopMetricsProvider) {
       return null;
     }

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BigtableCloudMonitoringExporter.java

@@ -58,6 +58,7 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
@@ -94,7 +95,6 @@ public final class BigtableCloudMonitoringExporter implements MetricExporter {
 
   private final MetricServiceClient client;
 
-  private final String bigtableProjectId;
   private final String taskId;
 
   // The resource the client application is running on
@@ -128,8 +128,7 @@ public final class BigtableCloudMonitoringExporter implements MetricExporter {
           .collect(ImmutableList.toImmutableList());
 
   public static BigtableCloudMonitoringExporter create(
-      String projectId, @Nullable Credentials credentials, @Nullable String endpoint)
-      throws IOException {
+      @Nullable Credentials credentials, @Nullable String endpoint) throws IOException {
     MetricServiceSettings.Builder settingsBuilder = MetricServiceSettings.newBuilder();
     CredentialsProvider credentialsProvider =
         Optional.ofNullable(credentials)
@@ -164,22 +163,17 @@ public static BigtableCloudMonitoringExporter create(
     }
 
     return new BigtableCloudMonitoringExporter(
-        projectId,
         MetricServiceClient.create(settingsBuilder.build()),
         applicationResource,
         BigtableExporterUtils.getDefaultTaskValue());
   }
 
   @VisibleForTesting
   BigtableCloudMonitoringExporter(
-      String projectId,
-      MetricServiceClient client,
-      @Nullable MonitoredResource applicationResource,
-      String taskId) {
+      MetricServiceClient client, @Nullable MonitoredResource applicationResource, String taskId) {
     this.client = client;
     this.taskId = taskId;
     this.applicationResource = applicationResource;
-    this.bigtableProjectId = projectId;
   }
 
   @Override
@@ -211,15 +205,8 @@ private CompletableResultCode exportBigtableResourceMetrics(Collection<MetricDat
       return CompletableResultCode.ofSuccess();
     }
 
-    // Verifies metrics project id are the same as the bigtable project id set on this client
-    if (!bigtableMetricData.stream()
-        .flatMap(metricData -> metricData.getData().getPoints().stream())
-        .allMatch(pd -> bigtableProjectId.equals(BigtableExporterUtils.getProjectId(pd)))) {
-      logger.log(Level.WARNING, "Metric data has different a projectId. Skip exporting.");
-      return CompletableResultCode.ofFailure();
-    }
-
-    List<TimeSeries> bigtableTimeSeries;
+    // List of timeseries by project id
+    Map<String, List<TimeSeries>> bigtableTimeSeries;
     try {
       bigtableTimeSeries =
           BigtableExporterUtils.convertToBigtableTimeSeries(bigtableMetricData, taskId);
@@ -231,37 +218,39 @@ private CompletableResultCode exportBigtableResourceMetrics(Collection<MetricDat
       return CompletableResultCode.ofFailure();
     }
 
-    ProjectName projectName = ProjectName.of(bigtableProjectId);
-    ApiFuture<List<Empty>> future = exportTimeSeries(projectName, bigtableTimeSeries);
-
     CompletableResultCode bigtableExportCode = new CompletableResultCode();
-    ApiFutures.addCallback(
-        future,
-        new ApiFutureCallback<List<Empty>>() {
-          @Override
-          public void onFailure(Throwable throwable) {
-            if (bigtableExportFailureLogged.compareAndSet(false, true)) {
-              String msg = "createServiceTimeSeries request failed for bigtable metrics.";
-              if (throwable instanceof PermissionDeniedException) {
-                msg +=
-                    String.format(
-                        " Need monitoring metric writer permission on project=%s. Follow https://cloud.google.com/bigtable/docs/client-side-metrics-setup to set up permissions.",
-                        projectName.getProject());
-              }
-              logger.log(Level.WARNING, msg, throwable);
-            }
-            bigtableExportCode.fail();
-          }
+    bigtableTimeSeries.forEach(
+        (projectId, ts) -> {
+          ProjectName projectName = ProjectName.of(projectId);
+          ApiFuture<List<Empty>> future = exportTimeSeries(projectName, ts);
+          ApiFutures.addCallback(
+              future,
+              new ApiFutureCallback<List<Empty>>() {
+                @Override
+                public void onFailure(Throwable throwable) {
+                  if (bigtableExportFailureLogged.compareAndSet(false, true)) {
+                    String msg = "createServiceTimeSeries request failed for bigtable metrics.";
+                    if (throwable instanceof PermissionDeniedException) {
+                      msg +=
+                          String.format(
+                              " Need monitoring metric writer permission on project=%s. Follow https://cloud.google.com/bigtable/docs/client-side-metrics-setup to set up permissions.",
+                              projectName.getProject());
+                    }
+                    logger.log(Level.WARNING, msg, throwable);
+                  }
+                  bigtableExportCode.fail();
+                }
 
-          @Override
-          public void onSuccess(List<Empty> emptyList) {
-            // When an export succeeded reset the export failure flag to false so if there's a
-            // transient failure it'll be logged.
-            bigtableExportFailureLogged.set(false);
-            bigtableExportCode.succeed();
-          }
-        },
-        MoreExecutors.directExecutor());
+                @Override
+                public void onSuccess(List<Empty> emptyList) {
+                  // When an export succeeded reset the export failure flag to false so if there's a
+                  // transient failure it'll be logged.
+                  bigtableExportFailureLogged.set(false);
+                  bigtableExportCode.succeed();
+                }
+              },
+              MoreExecutors.directExecutor());
+        });
 
     return bigtableExportCode;
   }

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BigtableExporterUtils.java

@@ -63,6 +63,7 @@
 import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -110,17 +111,24 @@ static String getProjectId(PointData pointData) {
     return pointData.getAttributes().get(BIGTABLE_PROJECT_ID_KEY);
   }
 
-  static List<TimeSeries> convertToBigtableTimeSeries(List<MetricData> collection, String taskId) {
-    List<TimeSeries> allTimeSeries = new ArrayList<>();
+  // Returns a list of timeseries by project id
+  static Map<String, List<TimeSeries>> convertToBigtableTimeSeries(
+      List<MetricData> collection, String taskId) {
+    Map<String, List<TimeSeries>> allTimeSeries = new HashMap<>();
 
     for (MetricData metricData : collection) {
       if (!metricData.getInstrumentationScopeInfo().getName().equals(METER_NAME)) {
         // Filter out metric data for instruments that are not part of the bigtable builtin metrics
         continue;
       }
-      metricData.getData().getPoints().stream()
-          .map(pointData -> convertPointToBigtableTimeSeries(metricData, pointData, taskId))
-          .forEach(allTimeSeries::add);
+
+      for (PointData pd : metricData.getData().getPoints()) {
+        String projectId = getProjectId(pd);
+        List<TimeSeries> current =
+            allTimeSeries.computeIfAbsent(projectId, ignored -> new ArrayList<>());
+        current.add(convertPointToBigtableTimeSeries(metricData, pd, taskId));
+        allTimeSeries.put(projectId, current);
+      }
     }
 
     return allTimeSeries;

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BuiltinMetricsView.java

@@ -38,35 +38,65 @@ private BuiltinMetricsView() {}
   /**
    * Register built-in metrics on the {@link SdkMeterProviderBuilder} with application default
    * credentials and default endpoint.
+   *
+   * @deprecated projectId is no longer used. Call {@link
+   *     #registerBuiltinMetrics(SdkMeterProviderBuilder)} instead.
    */
+  @Deprecated
   public static void registerBuiltinMetrics(String projectId, SdkMeterProviderBuilder builder)
       throws IOException {
     BuiltinMetricsView.registerBuiltinMetrics(
-        projectId, GoogleCredentials.getApplicationDefault(), builder);
+        GoogleCredentials.getApplicationDefault(), builder, null);
+  }
+
+  /**
+   * Register built-in metrics on the {@link SdkMeterProviderBuilder} with application default
+   * credentials and default endpoint.
+   */
+  public static void registerBuiltinMetrics(SdkMeterProviderBuilder builder) throws IOException {
+    BuiltinMetricsView.registerBuiltinMetrics(
+        GoogleCredentials.getApplicationDefault(), builder, null);
   }
 
   /**
    * Register built-in metrics on the {@link SdkMeterProviderBuilder} with custom credentials and
    * default endpoint.
+   *
+   * @deprecated projectId is no longer used. Call {@link #registerBuiltinMetrics(Credentials,
+   *     SdkMeterProviderBuilder, String)} instead.
    */
+  @Deprecated
   public static void registerBuiltinMetrics(
       String projectId, @Nullable Credentials credentials, SdkMeterProviderBuilder builder)
       throws IOException {
-    BuiltinMetricsView.registerBuiltinMetrics(projectId, credentials, builder, null);
+    BuiltinMetricsView.registerBuiltinMetrics(credentials, builder, null);
   }
 
   /**
    * Register built-in metrics on the {@link SdkMeterProviderBuilder} with custom credentials and
    * endpoint.
+   *
+   * @deprecated projectId is no longer used. Call {@link #registerBuiltinMetrics(Credentials,
+   *     SdkMeterProviderBuilder, String)} instead.
    */
+  @Deprecated
   public static void registerBuiltinMetrics(
       String projectId,
       @Nullable Credentials credentials,
       SdkMeterProviderBuilder builder,
       @Nullable String endpoint)
       throws IOException {
-    MetricExporter metricExporter =
-        BigtableCloudMonitoringExporter.create(projectId, credentials, endpoint);
+    registerBuiltinMetrics(credentials, builder, endpoint);
+  }
+
+  /**
+   * Register built-in metrics on the {@link SdkMeterProviderBuilder} with custom credentials and
+   * endpoint.
+   */
+  public static void registerBuiltinMetrics(
+      @Nullable Credentials credentials, SdkMeterProviderBuilder builder, @Nullable String endpoint)
+      throws IOException {
+    MetricExporter metricExporter = BigtableCloudMonitoringExporter.create(credentials, endpoint);
     for (Map.Entry<InstrumentSelector, View> entry :
         BuiltinMetricsConstants.getAllViews().entrySet()) {
       builder.registerView(entry.getKey(), entry.getValue());

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/CustomOpenTelemetryMetricsProvider.java

@@ -27,7 +27,7 @@
  * SdkMeterProviderBuilder sdkMeterProvider = SdkMeterProvider.builder();
  *
  * // register Builtin metrics on your meter provider with default credentials
- * BuiltinMetricsView.registerBuiltinMetrics("project-id", sdkMeterProvider);
+ * BuiltinMetricsView.registerBuiltinMetrics(sdkMeterProvider);
  *
  * // register other metrics reader and views
  * sdkMeterProvider.registerMetricReader(..);

google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/DefaultMetricsProvider.java

@@ -39,11 +39,9 @@ private DefaultMetricsProvider() {}
 
   @InternalApi
   public OpenTelemetry getOpenTelemetry(
-      String projectId, @Nullable String metricsEndpoint, @Nullable Credentials credentials)
-      throws IOException {
+      @Nullable String metricsEndpoint, @Nullable Credentials credentials) throws IOException {
     SdkMeterProviderBuilder meterProvider = SdkMeterProvider.builder();
-    BuiltinMetricsView.registerBuiltinMetrics(
-        projectId, credentials, meterProvider, metricsEndpoint);
+    BuiltinMetricsView.registerBuiltinMetrics(credentials, meterProvider, metricsEndpoint);
     return OpenTelemetrySdk.builder().setMeterProvider(meterProvider.build()).build();
   }
 

google-cloud-bigtable/src/test/java/com/google/cloud/bigtable/data/v2/stub/EnhancedBigtableStubTest.java

@@ -825,15 +825,16 @@ public void testExecuteQueryWaitTimeoutWorksWithMetadataFuture()
     settings.setStreamWatchdogProvider(
         InstantiatingWatchdogProvider.create().withCheckInterval(WATCHDOG_CHECK_DURATION));
 
-    EnhancedBigtableStub stub = EnhancedBigtableStub.create(settings.build());
-    ApiFuture<ResultSetMetadata> future =
-        stub.executeQueryCallable().call(Statement.of(WAIT_TIME_QUERY)).metadataFuture();
-
-    ExecutionException e = assertThrows(ExecutionException.class, future::get);
-    assertThat(e.getCause()).isInstanceOf(WatchdogTimeoutException.class);
-    assertThat(e.getCause().getMessage())
-        .contains("Canceled due to timeout waiting for next response");
-    assertThat(e).hasMessageThat().contains("Canceled due to timeout waiting for next response");
+    try (EnhancedBigtableStub stub = EnhancedBigtableStub.create(settings.build())) {
+      ApiFuture<ResultSetMetadata> future =
+          stub.executeQueryCallable().call(Statement.of(WAIT_TIME_QUERY)).metadataFuture();
+
+      ExecutionException e = assertThrows(ExecutionException.class, future::get);
+      assertThat(e.getCause()).isInstanceOf(WatchdogTimeoutException.class);
+      assertThat(e.getCause().getMessage())
+          .contains("Canceled due to timeout waiting for next response");
+      assertThat(e).hasMessageThat().contains("Canceled due to timeout waiting for next response");
+    }
   }
 
   private static class MetadataInterceptor implements ServerInterceptor {