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JPPF, the open source grid computing solution
There is a newer version: 6.3-alpha
/*
 * JPPF.
 * Copyright (C) 2005-2015 JPPF Team.
 * http://www.jppf.org
 *
 * 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.jppf.server.node.remote;

import org.jppf.JPPFNodeReconnectionNotification;
import org.jppf.comm.socket.*;
import org.jppf.node.*;
import org.jppf.node.connection.*;
import org.jppf.serialization.ObjectSerializer;
import org.jppf.ssl.SSLHelper;
import org.jppf.utils.*;
import org.slf4j.*;

/**
 * This class encapsulates the network connection of a node to a server job channel.
 * @author Laurent Cohen
 * @exclude
 */
public class RemoteNodeConnection extends AbstractNodeConnection {
  /**
   * Logger for this class.
   */
  private static Logger log = LoggerFactory.getLogger(RemoteNodeConnection.class);
  /**
   * Determines whether the debug level is enabled in the log configuration, without the cost of a method call.
   */
  private static boolean debugEnabled = LoggingUtils.isDebugEnabled(log);
  /**
   * Used to synchronize access to the underlying socket from multiple threads.
   */
  private SocketInitializer socketInitializer = new SocketInitializerImpl();
  /**
   * 
   */
  private final ObjectSerializer serializer;
  /**
   * Server connection information.
   */
  private final DriverConnectionInfo connectionInfo;

  /**
   * Initialize this connection with the specified serializer.
   * @param connectionInfo the server connection information.
   * @param serializer the serializer to use.
   */
  public RemoteNodeConnection(final DriverConnectionInfo connectionInfo, final ObjectSerializer serializer) {
    this.connectionInfo = connectionInfo;
    this.serializer = serializer;
  }

  @Override
  public void init() throws Exception {
    lock.lock();
    try {
      if (debugEnabled) log.debug("Initializing socket");
      TypedProperties config = JPPFConfiguration.getProperties();
      channel = new SocketClient();
      channel.setHost(connectionInfo.getHost());
      channel.setPort(connectionInfo.getPort());
      channel.setSerializer(serializer);
      if (debugEnabled) log.debug("end socket client initialization");
      //if (!NodeRunner.isOffline())
      System.out.println("Attempting connection to the node server at " + connectionInfo.getHost() + ':' + connectionInfo.getPort());
      socketInitializer.initializeSocket(channel);
      if (!socketInitializer.isSuccessful()) {
        if (debugEnabled) log.debug("socket initializer failed");
        throw new JPPFNodeReconnectionNotification("the JPPF node job channel could not reconnect to the driver", null, ConnectionReason.JOB_CHANNEL_INIT_ERROR);
      }
      //if (!NodeRunner.isOffline())
      System.out.println("Reconnected to the node server");
      if (debugEnabled) log.debug("sending channel identifier");
      channel.writeInt(JPPFIdentifiers.NODE_JOB_DATA_CHANNEL);
      if (connectionInfo.isSecure()) channel = SSLHelper.createSSLClientConnection(channel);
      if (debugEnabled) log.debug("end socket initializer");
    } finally {
      lock.unlock();
    }
  }

  @Override
  public void close() throws Exception {
    lock.lock();
    try {
      if (channel != null) {
        SocketWrapper tmp = channel;
        channel = null;
        tmp.close();
      }
    } finally {
      lock.unlock();
    }
  }
}