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Adds gRPC endpoint /zipkin.proto3.SpanService/Report (openzipkin#2328)
This adds an opt-in gRPC endpoint for reporting spans. A request to the gRPC `/zipkin.proto3.SpanService/Report` service is the same proto used with our `POST /api/v2/spans`, `Content-Type: application/x-protobuf` endpoint: `zipkin.proto3.ListOfSpans`. This is currently disabled by default, as the feature is experimental. Enable it like so: ```bash $ COLLECTOR_GRPC_ENABLED=true java -jar zipkin.jar ``` Under the scenes the runtime is the same as the POST endpoint (Armeria), and uses the same port (9411).
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78
zipkin-server/src/main/java/zipkin2/server/internal/ZipkinGrpcCollector.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 | ||
| * | ||
| * http://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 zipkin2.server.internal; | ||
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| import com.linecorp.armeria.common.grpc.protocol.AbstractUnaryGrpcService; | ||
| import com.linecorp.armeria.spring.ArmeriaServerConfigurator; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; | ||
| import org.springframework.context.annotation.Bean; | ||
| import zipkin2.Callback; | ||
| import zipkin2.codec.SpanBytesDecoder; | ||
| import zipkin2.collector.Collector; | ||
| import zipkin2.collector.CollectorMetrics; | ||
| import zipkin2.collector.CollectorSampler; | ||
| import zipkin2.storage.StorageComponent; | ||
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| /** Collector for receiving spans on a gRPC endpoint. */ | ||
| @ConditionalOnProperty(name = "zipkin.collector.grpc.enabled") // disabled by default | ||
| final class ZipkinGrpcCollector { | ||
| static final byte[] EMPTY = new byte[0]; | ||
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| @Bean ArmeriaServerConfigurator grpcCollectorConfigurator(StorageComponent storage, | ||
| CollectorSampler sampler, CollectorMetrics metrics) { | ||
| CollectorMetrics grpcMetrics = metrics.forTransport("grpc"); | ||
| Collector collector = Collector.newBuilder(getClass()) | ||
| .storage(storage) | ||
| .sampler(sampler) | ||
| .metrics(grpcMetrics) | ||
| .build(); | ||
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| return sb -> | ||
| sb.service("/zipkin.proto3.SpanService/Report", new SpanService(collector, grpcMetrics)); | ||
| } | ||
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| static final class SpanService extends AbstractUnaryGrpcService { | ||
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| final Collector collector; | ||
| final CollectorMetrics metrics; | ||
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| SpanService(Collector collector, CollectorMetrics metrics) { | ||
| this.collector = collector; | ||
| this.metrics = metrics; | ||
| } | ||
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| @Override protected CompletableFuture<byte[]> handleMessage(byte[] bytes) { | ||
| metrics.incrementMessages(); | ||
| CompletableFutureCallback result = new CompletableFutureCallback(); | ||
| collector.acceptSpans(bytes, SpanBytesDecoder.PROTO3, result); | ||
| return result; | ||
| } | ||
| } | ||
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| static final class CompletableFutureCallback extends CompletableFuture<byte[]> | ||
| implements Callback<Void> { | ||
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| @Override public void onSuccess(Void value) { | ||
| complete(EMPTY); | ||
| } | ||
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| @Override public void onError(Throwable t) { | ||
| completeExceptionally(t); | ||
| } | ||
| } | ||
| } |
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