hbase-server/src/main/java/org/apache/hadoop/hbase/util/NettyEventLoopGroupConfig.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.util;
  19
  20 import org.apache.hbase.thirdparty.io.netty.channel.Channel;
  21 import org.apache.hbase.thirdparty.io.netty.channel.EventLoopGroup;
  22 import org.apache.hbase.thirdparty.io.netty.channel.ServerChannel;
  23 import org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoopGroup;
  24 import org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollServerSocketChannel;
  25 import org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollSocketChannel;
  26 import org.apache.hbase.thirdparty.io.netty.channel.nio.NioEventLoopGroup;
  27 import org.apache.hbase.thirdparty.io.netty.channel.socket.nio.NioServerSocketChannel;
  28 import org.apache.hbase.thirdparty.io.netty.channel.socket.nio.NioSocketChannel;
  29 import org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultThreadFactory;
  30 import java.util.concurrent.ThreadFactory;
  31 import org.apache.hadoop.conf.Configuration;
  32 import org.apache.hadoop.hbase.ipc.NettyRpcClientConfigHelper;
  33 import org.apache.hadoop.hbase.wal.NettyAsyncFSWALConfigHelper;
  34 import org.apache.yetus.audience.InterfaceAudience;
  35
  36 /**
  37  * Event loop group related config.
  38  */
  39 @InterfaceAudience.Private
  40 public class NettyEventLoopGroupConfig {
  41   private final EventLoopGroup group;
  42
  43   private final Class<? extends ServerChannel> serverChannelClass;
  44
  45   private final Class<? extends Channel> clientChannelClass;
  46
  47   private static boolean useEpoll(Configuration conf) {
  48     // Config to enable native transport.
  49     boolean epollEnabled = conf.getBoolean("hbase.netty.nativetransport", true);
  50     // Use the faster native epoll transport mechanism on linux if enabled
  51     return epollEnabled && JVM.isLinux() && JVM.isAmd64();
  52   }
  53
  54   public NettyEventLoopGroupConfig(Configuration conf, String threadPoolName) {
  55     boolean useEpoll = useEpoll(conf);
  56     int workerCount = conf.getInt("hbase.netty.worker.count", 0);
  57     ThreadFactory eventLoopThreadFactory =
  58         new DefaultThreadFactory(threadPoolName, true, Thread.MAX_PRIORITY);
  59     if (useEpoll) {
  60       group = new EpollEventLoopGroup(workerCount, eventLoopThreadFactory);
  61       serverChannelClass = EpollServerSocketChannel.class;
  62       clientChannelClass = EpollSocketChannel.class;
  63     } else {
  64       group = new NioEventLoopGroup(workerCount, eventLoopThreadFactory);
  65       serverChannelClass = NioServerSocketChannel.class;
  66       clientChannelClass = NioSocketChannel.class;
  67     }
  68   }
  69
  70   public EventLoopGroup group() {
  71     return group;
  72   }
  73
  74   public Class<? extends ServerChannel> serverChannelClass() {
  75     return serverChannelClass;
  76   }
  77
  78   public Class<? extends Channel> clientChannelClass() {
  79     return clientChannelClass;
  80   }
  81
  82   public static NettyEventLoopGroupConfig setup(Configuration conf, String threadPoolName) {
  83     // Initialize netty event loop group at start as we may use it for rpc server, rpc client & WAL.
  84     NettyEventLoopGroupConfig nelgc = new NettyEventLoopGroupConfig(conf, threadPoolName);
  85     NettyRpcClientConfigHelper.setEventLoopConfig(conf, nelgc.group(), nelgc.clientChannelClass());
  86     NettyAsyncFSWALConfigHelper.setEventLoopConfig(conf, nelgc.group(), nelgc.clientChannelClass());
  87     return nelgc;
  88   }
  89 }