| /* |
| * 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.beam.runners.core.construction; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.function.Function; |
| import org.apache.beam.model.expansion.v1.ExpansionApi; |
| import org.apache.beam.model.expansion.v1.ExpansionServiceGrpc; |
| import org.apache.beam.model.pipeline.v1.Endpoints; |
| import org.apache.beam.vendor.grpc.v1p21p0.io.grpc.ManagedChannel; |
| |
| /** Default factory for ExpansionServiceClient used by External transform. */ |
| public class DefaultExpansionServiceClientFactory implements ExpansionServiceClientFactory { |
| private Map<Endpoints.ApiServiceDescriptor, ExpansionServiceClient> expansionServiceMap; |
| private Function<Endpoints.ApiServiceDescriptor, ManagedChannel> channelFactory; |
| |
| DefaultExpansionServiceClientFactory( |
| Function<Endpoints.ApiServiceDescriptor, ManagedChannel> channelFactory) { |
| this.expansionServiceMap = new ConcurrentHashMap<>(); |
| this.channelFactory = channelFactory; |
| } |
| |
| @Override |
| public void close() throws Exception { |
| for (ExpansionServiceClient client : expansionServiceMap.values()) { |
| try (AutoCloseable closer = client) {} |
| } |
| } |
| |
| @Override |
| public ExpansionServiceClient getExpansionServiceClient(Endpoints.ApiServiceDescriptor endpoint) { |
| return expansionServiceMap.computeIfAbsent( |
| endpoint, |
| e -> |
| new ExpansionServiceClient() { |
| private final ManagedChannel channel = channelFactory.apply(endpoint); |
| private final ExpansionServiceGrpc.ExpansionServiceBlockingStub service = |
| ExpansionServiceGrpc.newBlockingStub(channel); |
| |
| @Override |
| public ExpansionApi.ExpansionResponse expand(ExpansionApi.ExpansionRequest request) { |
| return service.expand(request); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| channel.shutdown(); |
| } |
| }); |
| } |
| } |