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feat: track the latency a request is queued on the grpc channel (#1604)
For all operations, it tracks the latency of the request getting queued on a grpc channel. For batch operations, it's the aggregated value of grpc channel queued latency and batcher flow control latencies.
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62 changes: 62 additions & 0 deletions
62
...rc/main/java/com/google/cloud/bigtable/data/v2/stub/metrics/BigtableGrpcStreamTracer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| * Copyright 2023 Google LLC | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.google.cloud.bigtable.data.v2.stub.metrics; | ||
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| import com.google.common.base.Stopwatch; | ||
| import io.grpc.Attributes; | ||
| import io.grpc.ClientStreamTracer; | ||
| import io.grpc.Metadata; | ||
| import java.util.concurrent.TimeUnit; | ||
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| /** | ||
| * Records the time a request is enqueued in a grpc channel queue. This a bridge between gRPC stream | ||
| * tracing and Bigtable tracing. Its primary purpose is to measure the transition time between | ||
| * asking gRPC to start an RPC and gRPC actually serializing that RPC. | ||
| */ | ||
| class BigtableGrpcStreamTracer extends ClientStreamTracer { | ||
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| private final Stopwatch stopwatch = Stopwatch.createUnstarted(); | ||
| private final BigtableTracer tracer; | ||
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| public BigtableGrpcStreamTracer(BigtableTracer tracer) { | ||
| this.tracer = tracer; | ||
| } | ||
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| @Override | ||
| public void streamCreated(Attributes transportAttrs, Metadata headers) { | ||
| stopwatch.start(); | ||
| } | ||
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| @Override | ||
| public void outboundMessageSent(int seqNo, long optionalWireSize, long optionalUncompressedSize) { | ||
| tracer.grpcChannelQueuedLatencies(stopwatch.elapsed(TimeUnit.MILLISECONDS)); | ||
| } | ||
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| static class Factory extends ClientStreamTracer.Factory { | ||
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| private final BigtableTracer tracer; | ||
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| Factory(BigtableTracer tracer) { | ||
| this.tracer = tracer; | ||
| } | ||
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| @Override | ||
| public ClientStreamTracer newClientStreamTracer( | ||
| ClientStreamTracer.StreamInfo info, Metadata headers) { | ||
| return new BigtableGrpcStreamTracer(tracer); | ||
| } | ||
| } | ||
| } |
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55 changes: 55 additions & 0 deletions
55
...va/com/google/cloud/bigtable/data/v2/stub/metrics/BigtableTracerBatchedUnaryCallable.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| /* | ||
| * Copyright 2023 Google LLC | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.google.cloud.bigtable.data.v2.stub.metrics; | ||
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|
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| import com.google.api.core.ApiFuture; | ||
| import com.google.api.core.ApiFutures; | ||
| import com.google.api.core.InternalApi; | ||
| import com.google.api.gax.grpc.GrpcResponseMetadata; | ||
| import com.google.api.gax.rpc.ApiCallContext; | ||
| import com.google.api.gax.rpc.UnaryCallable; | ||
| import com.google.common.util.concurrent.MoreExecutors; | ||
| import javax.annotation.Nonnull; | ||
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| /** | ||
| * This callable will do everything described in {@link BigtableTracerUnaryCallable} except that it | ||
| * won't inject a {@link BigtableGrpcStreamTracer}. For batching calls, we only want to calculate | ||
| * the total time client is blocked because of flow control. | ||
| */ | ||
| @InternalApi | ||
| public class BigtableTracerBatchedUnaryCallable<RequestT, ResponseT> | ||
| extends BigtableTracerUnaryCallable<RequestT, ResponseT> { | ||
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| private UnaryCallable<RequestT, ResponseT> innerCallable; | ||
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| public BigtableTracerBatchedUnaryCallable( | ||
| @Nonnull UnaryCallable<RequestT, ResponseT> innerCallable) { | ||
| super(innerCallable); | ||
| this.innerCallable = innerCallable; | ||
| } | ||
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| @Override | ||
| public ApiFuture futureCall(RequestT request, ApiCallContext context) { | ||
| final GrpcResponseMetadata responseMetadata = new GrpcResponseMetadata(); | ||
| BigtableTracerUnaryCallback<ResponseT> callback = | ||
| new BigtableTracerUnaryCallback<ResponseT>( | ||
| (BigtableTracer) context.getTracer(), responseMetadata); | ||
| ApiFuture<ResponseT> future = | ||
| innerCallable.futureCall(request, responseMetadata.addHandlers(context)); | ||
| ApiFutures.addCallback(future, callback, MoreExecutors.directExecutor()); | ||
| return future; | ||
| } | ||
| } |
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