Examples with HeaderTracerUnaryCallable com.google.cloud.bigtable.data.v2.stub.metrics.HeaderTracerUnaryCallable used on opensource projects

Example 6 with HeaderTracerUnaryCallable

use of com.google.cloud.bigtable.data.v2.stub.metrics.HeaderTracerUnaryCallable in project java-bigtable by googleapis.

the class EnhancedBigtableStub method createSampleRowKeysCallable.

/**
 * Creates a callable chain to handle SampleRowKeys RPcs. The chain will:
 *
 * <ul>
 *   <li>Convert a table id to a {@link com.google.bigtable.v2.SampleRowKeysRequest}.
 *   <li>Dispatch the request to the GAPIC's {@link BigtableStub#sampleRowKeysCallable()}.
 *   <li>Spool responses into a list.
 *   <li>Retry on failure.
 *   <li>Convert the responses into {@link KeyOffset}s.
 *   <li>Add tracing & metrics.
 * </ul>
 */
private UnaryCallable<String, List<KeyOffset>> createSampleRowKeysCallable() {
    String methodName = "SampleRowKeys";
    ServerStreamingCallable<SampleRowKeysRequest, SampleRowKeysResponse> base = GrpcRawCallableFactory.createServerStreamingCallable(GrpcCallSettings.<SampleRowKeysRequest, SampleRowKeysResponse>newBuilder().setMethodDescriptor(BigtableGrpc.getSampleRowKeysMethod()).setParamsExtractor(new RequestParamsExtractor<SampleRowKeysRequest>() {

        @Override
        public Map<String, String> extract(SampleRowKeysRequest sampleRowKeysRequest) {
            return ImmutableMap.of("table_name", sampleRowKeysRequest.getTableName(), "app_profile_id", sampleRowKeysRequest.getAppProfileId());
        }
    }).build(), settings.sampleRowKeysSettings().getRetryableCodes());
    UnaryCallable<SampleRowKeysRequest, List<SampleRowKeysResponse>> spoolable = base.all();
    UnaryCallable<SampleRowKeysRequest, List<SampleRowKeysResponse>> withStatsHeaders = new StatsHeadersUnaryCallable<>(spoolable);
    UnaryCallable<SampleRowKeysRequest, List<SampleRowKeysResponse>> withHeaderTracer = new HeaderTracerUnaryCallable<>(withStatsHeaders);
    UnaryCallable<SampleRowKeysRequest, List<SampleRowKeysResponse>> retryable = Callables.retrying(withHeaderTracer, settings.sampleRowKeysSettings(), clientContext);
    return createUserFacingUnaryCallable(methodName, new SampleRowKeysCallable(retryable, requestContext));
}