/** * 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 backtype.storm.messaging.netty; import backtype.storm.Config; import backtype.storm.messaging.IConnection; import backtype.storm.messaging.TaskMessage; import backtype.storm.utils.Utils; import org.jboss.netty.bootstrap.ServerBootstrap; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelFactory; import org.jboss.netty.channel.group.ChannelGroup; import org.jboss.netty.channel.group.DefaultChannelGroup; import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.net.InetSocketAddress; import java.util.Map; import java.util.concurrent.Executors; import java.util.concurrent.LinkedBlockingQueue; class Server implements IConnection { private static final Logger LOG = LoggerFactory.getLogger(Server.class); @SuppressWarnings("rawtypes") Map storm_conf; int port; private LinkedBlockingQueue<TaskMessage> message_queue; volatile ChannelGroup allChannels = new DefaultChannelGroup("storm-server"); final ChannelFactory factory; final ServerBootstrap bootstrap; @SuppressWarnings("rawtypes") Server(Map storm_conf, int port) { this.storm_conf = storm_conf; this.port = port; message_queue = new LinkedBlockingQueue<TaskMessage>(); // Configure the server. int buffer_size = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_BUFFER_SIZE)); int maxWorkers = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_SERVER_WORKER_THREADS)); if (maxWorkers > 0) { factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool(), maxWorkers); } else { factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool()); } bootstrap = new ServerBootstrap(factory); bootstrap.setOption("child.tcpNoDelay", true); bootstrap.setOption("child.receiveBufferSize", buffer_size); bootstrap.setOption("child.keepAlive", true); // Set up the pipeline factory. bootstrap.setPipelineFactory(new StormServerPipelineFactory(this)); // Bind and start to accept incoming connections. Channel channel = bootstrap.bind(new InetSocketAddress(port)); allChannels.add(channel); } /** * enqueue a received message * @param message * @throws InterruptedException */ protected void enqueue(TaskMessage message) throws InterruptedException { message_queue.put(message); LOG.debug("message received with task: {}, payload size: {}", message.task(), message.message().length); } /** * fetch a message from message queue synchronously (flags != 1) or asynchronously (flags==1) */ public TaskMessage recv(int flags) { if ((flags & 0x01) == 0x01) { //non-blocking return message_queue.poll(); } else { try { TaskMessage request = message_queue.take(); LOG.debug("request to be processed: {}", request); return request; } catch (InterruptedException e) { LOG.info("exception within msg receiving", e); return null; } } } /** * register a newly created channel * @param channel */ protected void addChannel(Channel channel) { allChannels.add(channel); } /** * close a channel * @param channel */ protected void closeChannel(Channel channel) { channel.close().awaitUninterruptibly(); allChannels.remove(channel); } /** * close all channels, and release resources */ public synchronized void close() { if (allChannels != null) { allChannels.close().awaitUninterruptibly(); factory.releaseExternalResources(); allChannels = null; } } public void send(int task, byte[] message) { throw new RuntimeException("Server connection should not send any messages"); } }