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Motivation: gRPC-Java [1.30.0](https://github.com/grpc/grpc-java/releases/tag/v1.30.0) has been released We need a workaround for `ProtoReflectionService`. Because it does not implement `InternalNotifyOnServerBuild` anymore. See grpc/grpc-java#6967 line#2806 It is a temporary workaround until upstream handles grpc/grpc-java#7138. Motivations: - Upgrade gRPC to 1.30.0 from 1.29.0 - Add ProtoReflectionServiceInterceptor that injects dummy server to gRPC context. Result: You can run gRPC 1.30.0 with Armeria server. Fixes line#2806
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136 changes: 136 additions & 0 deletions
136
grpc/src/main/java/com/linecorp/armeria/server/grpc/ProtoReflectionServiceInterceptor.java
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| /* | ||
| * Copyright 2020 LINE Corporation | ||
| * | ||
| * LINE Corporation 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: | ||
| * | ||
| * 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. | ||
| */ | ||
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| package com.linecorp.armeria.server.grpc; | ||
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| import static com.google.common.collect.ImmutableMap.toImmutableMap; | ||
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| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.function.Function; | ||
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| import javax.annotation.Nullable; | ||
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| import com.google.common.collect.ImmutableList; | ||
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| import com.linecorp.armeria.server.ServiceRequestContext; | ||
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| import io.grpc.Context; | ||
| import io.grpc.Contexts; | ||
| import io.grpc.InternalServer; | ||
| import io.grpc.Metadata; | ||
| import io.grpc.Server; | ||
| import io.grpc.ServerCall; | ||
| import io.grpc.ServerCall.Listener; | ||
| import io.grpc.ServerCallHandler; | ||
| import io.grpc.ServerInterceptor; | ||
| import io.grpc.ServerServiceDefinition; | ||
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| final class ProtoReflectionServiceInterceptor implements ServerInterceptor { | ||
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| static final ProtoReflectionServiceInterceptor INSTANCE = new ProtoReflectionServiceInterceptor(); | ||
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| @Nullable | ||
| private static Server dummyServer; | ||
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| private ProtoReflectionServiceInterceptor() {} | ||
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| @Override | ||
| public <I, O> Listener<I> interceptCall(ServerCall<I, O> call, Metadata headers, | ||
| ServerCallHandler<I, O> next) { | ||
| if (dummyServer == null) { | ||
| synchronized (INSTANCE) { | ||
| dummyServer = newDummyServer(); | ||
| } | ||
| } | ||
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| final Context context = Context.current().withValue(InternalServer.SERVER_CONTEXT_KEY, dummyServer); | ||
| return Contexts.interceptCall(context, call, headers, next); | ||
| } | ||
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| private static Server newDummyServer() { | ||
| final Map<String, ServerServiceDefinition> grpcServices = | ||
| ServiceRequestContext.current().config().server().config().virtualHosts().stream() | ||
| .flatMap(host -> host.serviceConfigs().stream()) | ||
| .map(serviceConfig -> serviceConfig.service().as(FramedGrpcService.class)) | ||
| .filter(Objects::nonNull) | ||
| .flatMap(service -> service.services().stream()) | ||
| // Armeria allows the same service to be registered multiple times at | ||
| // different paths, but proto reflection service only supports a single | ||
| // instance of each service so we dedupe here. | ||
| .collect(toImmutableMap(def -> def.getServiceDescriptor().getName(), | ||
| Function.identity(), | ||
| (a, b) -> a)); | ||
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| return new Server() { | ||
| @Override | ||
| public Server start() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public List<ServerServiceDefinition> getServices() { | ||
| return ImmutableList.copyOf(grpcServices.values()); | ||
| } | ||
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| @Override | ||
| public List<ServerServiceDefinition> getImmutableServices() { | ||
| // NB: This will probably go away in favor of just getServices above, so we | ||
| // implement both the same. | ||
| // https://github.com/grpc/grpc-java/issues/4600 | ||
| return getServices(); | ||
| } | ||
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| @Override | ||
| public List<ServerServiceDefinition> getMutableServices() { | ||
| // Armeria does not have the concept of mutable services. | ||
| return ImmutableList.of(); | ||
| } | ||
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| @Override | ||
| public Server shutdown() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public Server shutdownNow() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public boolean isShutdown() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public boolean isTerminated() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public boolean awaitTermination(long timeout, TimeUnit unit) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public void awaitTermination() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| }; | ||
| } | ||
| } |