TcpClientManager.java

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/*
 * Copyright (C) 2011 Google Inc.
 * 
 * Licensed 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.ros.internal.transport.tcp;

import com.google.common.collect.Lists;

import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.group.ChannelGroup;
import org.jboss.netty.channel.group.DefaultChannelGroup;

import java.net.SocketAddress;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Executor;

public class TcpClientManager {

  private final ChannelGroup channelGroup;
  private final Collection<TcpClient> tcpClients;
  private final List<NamedChannelHandler> namedChannelHandlers;
  private final Executor executor;

  public TcpClientManager(Executor executor) {
    this.executor = executor;
    channelGroup = new DefaultChannelGroup();
    tcpClients = Lists.newArrayList();
    namedChannelHandlers = Lists.newArrayList();
  }

  public void addNamedChannelHandler(NamedChannelHandler namedChannelHandler) {
    namedChannelHandlers.add(namedChannelHandler);
  }

  public void addAllNamedChannelHandlers(List<NamedChannelHandler> namedChannelHandlers) {
    this.namedChannelHandlers.addAll(namedChannelHandlers);
  }

  public TcpClient connect(String connectionName, SocketAddress socketAddress) {
    TcpClient tcpClient = new TcpClient(channelGroup, executor);
    tcpClient.addAllNamedChannelHandlers(namedChannelHandlers);
    tcpClient.connect(connectionName, socketAddress);
    tcpClients.add(tcpClient);
    return tcpClient;
  }

  public void shutdown() {
    channelGroup.close().awaitUninterruptibly();
    tcpClients.clear();
    // We don't call channelFactory.releaseExternalResources() or
    // bootstrap.releaseExternalResources() since the only external resource is
    // the ExecutorService which must remain in the control of the overall
    // application.
  }
}