| /* |
| * 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.bookkeeper.clients.impl.channel; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import io.grpc.Channel; |
| import io.grpc.ClientInterceptor; |
| import io.grpc.ClientInterceptors; |
| import io.grpc.ManagedChannel; |
| import io.grpc.ManagedChannelBuilder; |
| import java.util.Optional; |
| import java.util.function.Function; |
| import javax.annotation.concurrent.GuardedBy; |
| import org.apache.bookkeeper.clients.config.StorageClientSettings; |
| import org.apache.bookkeeper.clients.impl.container.StorageContainerClientInterceptor; |
| import org.apache.bookkeeper.clients.resolver.EndpointResolver; |
| import org.apache.bookkeeper.clients.utils.GrpcUtils; |
| import org.apache.bookkeeper.common.grpc.stats.MonitoringClientInterceptor; |
| import org.apache.bookkeeper.stream.proto.common.Endpoint; |
| import org.apache.bookkeeper.stream.proto.kv.rpc.TableServiceGrpc; |
| import org.apache.bookkeeper.stream.proto.kv.rpc.TableServiceGrpc.TableServiceFutureStub; |
| import org.apache.bookkeeper.stream.proto.storage.MetaRangeServiceGrpc; |
| import org.apache.bookkeeper.stream.proto.storage.MetaRangeServiceGrpc.MetaRangeServiceFutureStub; |
| import org.apache.bookkeeper.stream.proto.storage.RootRangeServiceGrpc; |
| import org.apache.bookkeeper.stream.proto.storage.RootRangeServiceGrpc.RootRangeServiceFutureStub; |
| import org.apache.bookkeeper.stream.proto.storage.StorageContainerServiceGrpc; |
| import org.apache.bookkeeper.stream.proto.storage.StorageContainerServiceGrpc.StorageContainerServiceFutureStub; |
| |
| /** |
| * A channel connected to a range server. |
| * |
| * <p>The channel is multiplexed for different rpc usage. |
| */ |
| public class StorageServerChannel implements AutoCloseable { |
| |
| public static Function<Endpoint, StorageServerChannel> factory(StorageClientSettings settings) { |
| return new Function<Endpoint, StorageServerChannel>() { |
| |
| private final Optional<MonitoringClientInterceptor> interceptor = |
| settings.statsLogger().map(statsLogger -> |
| MonitoringClientInterceptor.create(statsLogger, true)); |
| |
| @Override |
| public StorageServerChannel apply(Endpoint endpoint) { |
| StorageServerChannel channel = new StorageServerChannel( |
| endpoint, |
| Optional.empty(), |
| settings.usePlaintext(), |
| settings.endpointResolver()); |
| return interceptor |
| .map(interceptor -> channel.intercept(interceptor)) |
| .orElse(channel); |
| } |
| }; |
| } |
| |
| private final Optional<String> token; |
| private final Channel channel; |
| private final StorageServerChannel interceptedServerChannel; |
| |
| @GuardedBy("this") |
| private RootRangeServiceFutureStub rootRangeService; |
| @GuardedBy("this") |
| private MetaRangeServiceFutureStub metaRangeService; |
| @GuardedBy("this") |
| private StorageContainerServiceFutureStub scService; |
| @GuardedBy("this") |
| private TableServiceFutureStub kvService; |
| |
| /** |
| * Construct a range server channel to a given range server endpoint. |
| * |
| * @param endpoint range server endpoint. |
| * @param token token used to access range server |
| * @param usePlainText whether to plain text protocol or not |
| */ |
| @SuppressWarnings("deprecation") |
| public StorageServerChannel(Endpoint endpoint, |
| Optional<String> token, |
| boolean usePlainText, |
| EndpointResolver endpointResolver) { |
| this.token = token; |
| Endpoint resolvedEndpoint = endpointResolver.resolve(endpoint); |
| this.channel = ManagedChannelBuilder.forAddress( |
| resolvedEndpoint.getHostname(), |
| resolvedEndpoint.getPort()) |
| .usePlaintext(usePlainText) |
| .build(); |
| this.interceptedServerChannel = null; |
| } |
| |
| public Channel getGrpcChannel() { |
| return channel; |
| } |
| |
| @VisibleForTesting |
| public StorageServerChannel(ManagedChannel channel, |
| Optional<String> token) { |
| this((Channel) channel, token); |
| } |
| |
| protected StorageServerChannel(Channel channel, |
| Optional<String> token) { |
| this(channel, token, null); |
| } |
| |
| private StorageServerChannel(Channel channel, |
| Optional<String> token, |
| StorageServerChannel interceptedServerChannel) { |
| this.token = token; |
| this.channel = channel; |
| this.interceptedServerChannel = interceptedServerChannel; |
| } |
| |
| public synchronized RootRangeServiceFutureStub getRootRangeService() { |
| if (null == rootRangeService) { |
| rootRangeService = GrpcUtils.configureGrpcStub( |
| RootRangeServiceGrpc.newFutureStub(channel), |
| token); |
| } |
| return rootRangeService; |
| } |
| |
| public synchronized MetaRangeServiceFutureStub getMetaRangeService() { |
| if (null == metaRangeService) { |
| metaRangeService = GrpcUtils.configureGrpcStub( |
| MetaRangeServiceGrpc.newFutureStub(channel), |
| token); |
| } |
| return metaRangeService; |
| } |
| |
| public synchronized StorageContainerServiceFutureStub getStorageContainerService() { |
| if (null == scService) { |
| scService = GrpcUtils.configureGrpcStub( |
| StorageContainerServiceGrpc.newFutureStub(channel), |
| token); |
| } |
| return scService; |
| } |
| |
| public synchronized TableServiceFutureStub getTableService() { |
| if (null == kvService) { |
| kvService = GrpcUtils.configureGrpcStub( |
| TableServiceGrpc.newFutureStub(channel), |
| token); |
| } |
| return kvService; |
| } |
| |
| /** |
| * Create an intercepted server channel that add additional storage container metadata. |
| * |
| * @param scId storage container id |
| * @return an intercepted server channel. |
| */ |
| public StorageServerChannel intercept(long scId) { |
| return intercept(new StorageContainerClientInterceptor(scId)); |
| } |
| |
| public StorageServerChannel intercept(ClientInterceptor... interceptors) { |
| Channel interceptedChannel = ClientInterceptors.intercept( |
| this.channel, |
| interceptors); |
| return new StorageServerChannel( |
| interceptedChannel, |
| this.token, |
| this); |
| } |
| |
| @Override |
| public void close() { |
| if (interceptedServerChannel != null) { |
| interceptedServerChannel.close(); |
| } else { |
| if (channel instanceof ManagedChannel) { |
| ((ManagedChannel) channel).shutdown(); |
| } |
| } |
| } |
| } |