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Extract server-timing trailer and create metrics for gfe latency
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...ble/src/main/java/com/google/cloud/bigtable/data/v2/stub/BigtableInterceptorProvider.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * Copyright 2020 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; | ||
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|
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| import com.google.api.gax.grpc.GrpcInterceptorProvider; | ||
| import com.google.common.collect.ImmutableList; | ||
| import io.grpc.ClientInterceptor; | ||
| import java.util.List; | ||
|
|
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| public class BigtableInterceptorProvider implements GrpcInterceptorProvider { | ||
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|
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| private static final ClientHeaderInterceptor headerInterceptor = new ClientHeaderInterceptor(); | ||
| private List<ClientInterceptor> clientInterceptors; | ||
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|
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| private BigtableInterceptorProvider(List<ClientInterceptor> interceptors) { | ||
| this.clientInterceptors = interceptors; | ||
| } | ||
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| public static BigtableInterceptorProvider createDefault() { | ||
| return new BigtableInterceptorProvider(ImmutableList.<ClientInterceptor>of(headerInterceptor)); | ||
| } | ||
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|
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| public static BigtableInterceptorProvider create(List<ClientInterceptor> interceptors) { | ||
| return new BigtableInterceptorProvider(interceptors); | ||
| } | ||
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|
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| @Override | ||
| public List<ClientInterceptor> getInterceptors() { | ||
| return clientInterceptors; | ||
| } | ||
| } |
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...igtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/ClientHeaderInterceptor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* | ||
| * Copyright 2020 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; | ||
|
|
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| import com.google.api.gax.tracing.SpanName; | ||
| import com.google.cloud.bigtable.data.v2.stub.metrics.HeaderTracer; | ||
| import com.google.cloud.bigtable.data.v2.stub.metrics.RpcMeasureConstants; | ||
| import io.grpc.CallOptions; | ||
| import io.grpc.Channel; | ||
| import io.grpc.ClientCall; | ||
| import io.grpc.ClientInterceptor; | ||
| import io.grpc.ForwardingClientCall.SimpleForwardingClientCall; | ||
| import io.grpc.ForwardingClientCallListener.SimpleForwardingClientCallListener; | ||
| import io.grpc.Metadata; | ||
| import io.grpc.MethodDescriptor; | ||
| import java.util.logging.Logger; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
|
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| public class ClientHeaderInterceptor implements ClientInterceptor { | ||
| public static final Metadata.Key<String> SERVER_TIMING_HEADER_KEY = | ||
| Metadata.Key.of("server-timing", Metadata.ASCII_STRING_MARSHALLER); | ||
|
|
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| private static final Logger LOGGER = Logger.getLogger(ClientHeaderInterceptor.class.getName()); | ||
| private static final String CLIENT_NAME = "Bigtable"; | ||
| private static final Pattern GFE_HEADER_PATTERN = Pattern.compile(".*dur=(?<dur>\\d+)"); | ||
| private static final Pattern METHOD_DESCRIPTOR_PATTERN = Pattern.compile(".*/(?<op>[a-zA-Z]+)"); | ||
|
|
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| @Override | ||
| public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall( | ||
| final MethodDescriptor<ReqT, RespT> method, final CallOptions callOptions, Channel channel) { | ||
| final ClientCall<ReqT, RespT> clientCall = channel.newCall(method, callOptions); | ||
| final SpanName spanName = processMethodName(method.getFullMethodName()); | ||
| final HeaderTracer tracer = callOptions.getOption(HeaderTracer.HEADER_TRACER_CONTEXT_KEY); | ||
| return new SimpleForwardingClientCall<ReqT, RespT>(clientCall) { | ||
| @Override | ||
| public void start(Listener<RespT> responseListener, Metadata headers) { | ||
| super.start( | ||
| new SimpleForwardingClientCallListener<RespT>(responseListener) { | ||
| @Override | ||
| public void onHeaders(Metadata headers) { | ||
| processHeader(headers, tracer, spanName); | ||
| super.onHeaders(headers); | ||
| } | ||
| }, | ||
| headers); | ||
| } | ||
| }; | ||
| } | ||
|
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| private SpanName processMethodName(String method) { | ||
| Matcher matcher = METHOD_DESCRIPTOR_PATTERN.matcher(method); | ||
| if (matcher.find()) { | ||
| return SpanName.of(CLIENT_NAME, matcher.group("op")); | ||
| } | ||
| LOGGER.warning( | ||
| String.format("Failed to get bigtable op name. Received method descriptor: %s.", method)); | ||
| return null; | ||
| } | ||
|
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| private void processHeader(Metadata headers, HeaderTracer tracer, SpanName span) { | ||
| if (tracer == null) { | ||
| LOGGER.warning("Couldn't find HeaderTracer in call options. Skip extracting gfe metrics"); | ||
| return; | ||
| } | ||
| if (headers.get(SERVER_TIMING_HEADER_KEY) != null) { | ||
| String serverTiming = headers.get(SERVER_TIMING_HEADER_KEY); | ||
| Matcher matcher = GFE_HEADER_PATTERN.matcher(serverTiming); | ||
| tracer.recordHeader(RpcMeasureConstants.BIGTABLE_GFE_MISSING_COUNT, 0, span); | ||
| if (matcher.find()) { | ||
| long latency = Long.valueOf(matcher.group("dur")); | ||
| tracer.recordHeader(RpcMeasureConstants.BIGTABLE_GFE_LATENCY, latency, span); | ||
| } else { | ||
| LOGGER.warning( | ||
| String.format( | ||
| "Received invalid %s header: %s, failed to add to metrics.", | ||
| SERVER_TIMING_HEADER_KEY.name(), serverTiming)); | ||
| } | ||
| } else { | ||
| tracer.recordHeader(RpcMeasureConstants.BIGTABLE_GFE_MISSING_COUNT, 1l, span); | ||
| } | ||
| } | ||
| } |
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