001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.ipc; 019 020import java.io.IOException; 021import java.net.SocketAddress; 022import org.apache.hadoop.conf.Configuration; 023import org.apache.hadoop.hbase.HBaseInterfaceAudience; 024import org.apache.hadoop.hbase.HConstants; 025import org.apache.hadoop.hbase.client.MetricsConnection; 026import org.apache.hadoop.hbase.util.Pair; 027import org.apache.yetus.audience.InterfaceAudience; 028 029import org.apache.hbase.thirdparty.io.netty.channel.Channel; 030import org.apache.hbase.thirdparty.io.netty.channel.EventLoopGroup; 031import org.apache.hbase.thirdparty.io.netty.channel.nio.NioEventLoopGroup; 032import org.apache.hbase.thirdparty.io.netty.channel.socket.nio.NioSocketChannel; 033import org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultThreadFactory; 034 035/** 036 * Netty client for the requests and responses. 037 * @since 2.0.0 038 */ 039@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) 040public class NettyRpcClient extends AbstractRpcClient<NettyRpcConnection> { 041 042 final EventLoopGroup group; 043 044 final Class<? extends Channel> channelClass; 045 046 private final boolean shutdownGroupWhenClose; 047 048 public NettyRpcClient(Configuration configuration, String clusterId, SocketAddress localAddress, 049 MetricsConnection metrics) { 050 super(configuration, clusterId, localAddress, metrics); 051 Pair<EventLoopGroup, Class<? extends Channel>> groupAndChannelClass = 052 NettyRpcClientConfigHelper.getEventLoopConfig(conf); 053 if (groupAndChannelClass == null) { 054 // Use our own EventLoopGroup. 055 int threadCount = 056 conf.getInt(NettyRpcClientConfigHelper.HBASE_NETTY_EVENTLOOP_RPCCLIENT_THREADCOUNT_KEY, 0); 057 this.group = new NioEventLoopGroup(threadCount, 058 new DefaultThreadFactory("RPCClient(own)-NioEventLoopGroup", true, Thread.NORM_PRIORITY)); 059 this.channelClass = NioSocketChannel.class; 060 this.shutdownGroupWhenClose = true; 061 } else { 062 this.group = groupAndChannelClass.getFirst(); 063 this.channelClass = groupAndChannelClass.getSecond(); 064 this.shutdownGroupWhenClose = false; 065 } 066 } 067 068 /** Used in test only. */ 069 NettyRpcClient(Configuration configuration) { 070 this(configuration, HConstants.CLUSTER_ID_DEFAULT, null, null); 071 } 072 073 @Override 074 protected NettyRpcConnection createConnection(ConnectionId remoteId) throws IOException { 075 return new NettyRpcConnection(this, remoteId); 076 } 077 078 @Override 079 protected void closeInternal() { 080 if (shutdownGroupWhenClose) { 081 group.shutdownGracefully(); 082 } 083 } 084}