/** * 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 org.apache.hadoop.hbase.client; import static org.apache.hadoop.hbase.util.FutureUtils.addListener; import java.io.IOException; import java.util.concurrent.CompletableFuture; import org.apache.hadoop.hbase.client.AsyncRpcRetryingCallerFactory.ServerRequestCallerBuilder; import org.apache.hadoop.hbase.ipc.CoprocessorRpcUtils; import org.apache.hadoop.hbase.ipc.HBaseRpcController; import org.apache.yetus.audience.InterfaceAudience; import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor; import org.apache.hbase.thirdparty.com.google.protobuf.Message; import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback; import org.apache.hbase.thirdparty.com.google.protobuf.RpcChannel; import org.apache.hbase.thirdparty.com.google.protobuf.RpcController; import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService; import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceRequest; import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceResponse; /** * The implementation of a region server based coprocessor rpc channel. */ @InterfaceAudience.Private public class RegionServerCoprocessorRpcChannelImpl implements RpcChannel { ServerRequestCallerBuilder<Message> callerBuilder; RegionServerCoprocessorRpcChannelImpl(ServerRequestCallerBuilder<Message> callerBuilder) { this.callerBuilder = callerBuilder; } private CompletableFuture<Message> rpcCall(MethodDescriptor method, Message request, Message responsePrototype, HBaseRpcController controller, ClientService.Interface stub) { CompletableFuture<Message> future = new CompletableFuture<>(); CoprocessorServiceRequest csr = CoprocessorRpcUtils.getCoprocessorServiceRequest(method, request); stub.execRegionServerService( controller, csr, new org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback<CoprocessorServiceResponse>() { @Override public void run(CoprocessorServiceResponse resp) { if (controller.failed()) { future.completeExceptionally(controller.getFailed()); } else { try { future.complete(CoprocessorRpcUtils.getResponse(resp, responsePrototype)); } catch (IOException e) { future.completeExceptionally(e); } } } }); return future; } @Override public void callMethod(MethodDescriptor method, RpcController controller, Message request, Message responsePrototype, RpcCallback<Message> done) { addListener( callerBuilder.action((c, s) -> rpcCall(method, request, responsePrototype, c, s)).call(), ((r, e) -> { if (e != null) { ((ClientCoprocessorRpcController) controller).setFailed(e); } done.run(r); })); } }