java/client/src/main/java/org/apache/mina/transport/socket/nio/ExistingSocketConnector.java - qpid - Git at Google

 /*
  *  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 org.apache.mina.transport.socket.nio;

 import edu.emory.mathcs.backport.java.util.concurrent.Executor;
 import org.apache.mina.common.ConnectFuture;
 import org.apache.mina.common.ExceptionMonitor;
 import org.apache.mina.common.IoConnector;
 import org.apache.mina.common.IoConnectorConfig;
 import org.apache.mina.common.IoHandler;
 import org.apache.mina.common.IoServiceConfig;
 import org.apache.mina.common.support.BaseIoConnector;
 import org.apache.mina.common.support.DefaultConnectFuture;
 import org.apache.mina.util.NamePreservingRunnable;
 import org.apache.mina.util.NewThreadExecutor;
 import org.apache.mina.util.Queue;

 import java.io.IOException;
 import java.net.ConnectException;
 import java.net.Socket;
 import java.net.SocketAddress;
 import java.nio.channels.SelectionKey;
 import java.nio.channels.Selector;
 import java.nio.channels.SocketChannel;
 import java.util.Iterator;
 import java.util.Set;

 /**
  * {@link IoConnector} for socket transport (TCP/IP).
  *
  * @author The Apache Directory Project (mina-dev@directory.apache.org)
  * @version $Rev: 627427 $, $Date: 2008-02-13 14:39:10 +0000 (Wed, 13 Feb 2008) $
  */
 public class ExistingSocketConnector extends BaseIoConnector
 {
     /** @noinspection StaticNonFinalField */
     private static volatile int nextId = 0;

     private final Object lock = new Object();
     private final int id = nextId++;
     private final String threadName = "SocketConnector-" + id;
     private SocketConnectorConfig defaultConfig = new SocketConnectorConfig();
     private final Queue connectQueue = new Queue();
     private final SocketIoProcessor[] ioProcessors;
     private final int processorCount;
     private final Executor executor;

     /** @noinspection FieldAccessedSynchronizedAndUnsynchronized */
     private Selector selector;
     private Worker worker;
     private int processorDistributor = 0;
     private int workerTimeout = 60;  // 1 min.
     private Socket _openSocket = null;

     /** Create a connector with a single processing thread using a NewThreadExecutor */
     public ExistingSocketConnector()
     {
         this(1, new NewThreadExecutor());
     }

     /**
      * Create a connector with the desired number of processing threads
      *
      * @param processorCount Number of processing threads
      * @param executor       Executor to use for launching threads
      */
     public ExistingSocketConnector(int processorCount, Executor executor)
     {
         if (processorCount < 1)
         {
             throw new IllegalArgumentException("Must have at least one processor");
         }

         this.executor = executor;
         this.processorCount = processorCount;
         ioProcessors = new SocketIoProcessor[processorCount];

         for (int i = 0; i < processorCount; i++)
         {
             ioProcessors[i] = new SocketIoProcessor("SocketConnectorIoProcessor-" + id + "." + i, executor);
         }
     }

     /**
      * How many seconds to keep the connection thread alive between connection requests
      *
      * @return Number of seconds to keep connection thread alive
      */
     public int getWorkerTimeout()
     {
         return workerTimeout;
     }

     /**
      * Set how many seconds the connection worker thread should remain alive once idle before terminating itself.
      *
      * @param workerTimeout Number of seconds to keep thread alive. Must be >=0
      */
     public void setWorkerTimeout(int workerTimeout)
     {
         if (workerTimeout < 0)
         {
             throw new IllegalArgumentException("Must be >= 0");
         }
         this.workerTimeout = workerTimeout;
     }

     public ConnectFuture connect(SocketAddress address, IoHandler handler, IoServiceConfig config)
     {
         return connect(address, null, handler, config);
     }

     public ConnectFuture connect(SocketAddress address, SocketAddress localAddress,
                                  IoHandler handler, IoServiceConfig config)
     {
         /** Changes here from the Mina OpenSocketConnector.
          * Ignoreing all address as they are not needed */

         if (handler == null)
         {
             throw new NullPointerException("handler");
         }


         if (config == null)
         {
             config = getDefaultConfig();
         }

         if (_openSocket == null)
         {
             throw new IllegalArgumentException("Specifed Socket not active");
         }

         boolean success = false;

         try
         {
             DefaultConnectFuture future = new DefaultConnectFuture();
             newSession(_openSocket, handler, config, future);
             success = true;
             return future;
         }
         catch (IOException e)
         {
             return DefaultConnectFuture.newFailedFuture(e);
         }
         finally
         {
             if (!success && _openSocket != null)
             {
                 try
                 {
                     _openSocket.close();
                 }
                 catch (IOException e)
                 {
                     ExceptionMonitor.getInstance().exceptionCaught(e);
                 }
             }
         }
     }

     public IoServiceConfig getDefaultConfig()
     {
         return defaultConfig;
     }

     /**
      * Sets the config this connector will use by default.
      *
      * @param defaultConfig the default config.
      *
      * @throws NullPointerException if the specified value is <code>null</code>.
      */
     public void setDefaultConfig(SocketConnectorConfig defaultConfig)
     {
         if (defaultConfig == null)
         {
             throw new NullPointerException("defaultConfig");
         }
         this.defaultConfig = defaultConfig;
     }

     private synchronized void startupWorker() throws IOException
     {
         if (worker == null)
         {
             selector = Selector.open();
             worker = new Worker();
             executor.execute(new NamePreservingRunnable(worker));
         }
     }

     private void registerNew()
     {
         if (connectQueue.isEmpty())
         {
             return;
         }

         for (; ;)
         {
             ConnectionRequest req;
             synchronized (connectQueue)
             {
                 req = (ConnectionRequest) connectQueue.pop();
             }

             if (req == null)
             {
                 break;
             }

             SocketChannel ch = req.channel;
             try
             {
                 ch.register(selector, SelectionKey.OP_CONNECT, req);
             }
             catch (IOException e)
             {
                 req.setException(e);
             }
         }
     }

     private void processSessions(Set keys)
     {
         Iterator it = keys.iterator();

         while (it.hasNext())
         {
             SelectionKey key = (SelectionKey) it.next();

             if (!key.isConnectable())
             {
                 continue;
             }

             SocketChannel ch = (SocketChannel) key.channel();
             ConnectionRequest entry = (ConnectionRequest) key.attachment();

             boolean success = false;
             try
             {
                 ch.finishConnect();
                 newSession(ch, entry.handler, entry.config, entry);
                 success = true;
             }
             catch (Throwable e)
             {
                 entry.setException(e);
             }
             finally
             {
                 key.cancel();
                 if (!success)
                 {
                     try
                     {
                         ch.close();
                     }
                     catch (IOException e)
                     {
                         ExceptionMonitor.getInstance().exceptionCaught(e);
                     }
                 }
             }
         }

         keys.clear();
     }

     private void processTimedOutSessions(Set keys)
     {
         long currentTime = System.currentTimeMillis();
         Iterator it = keys.iterator();

         while (it.hasNext())
         {
             SelectionKey key = (SelectionKey) it.next();

             if (!key.isValid())
             {
                 continue;
             }

             ConnectionRequest entry = (ConnectionRequest) key.attachment();

             if (currentTime >= entry.deadline)
             {
                 entry.setException(new ConnectException());
                 try
                 {
                     key.channel().close();
                 }
                 catch (IOException e)
                 {
                     ExceptionMonitor.getInstance().exceptionCaught(e);
                 }
                 finally
                 {
                     key.cancel();
                 }
             }
         }
     }

     private void newSession(Socket socket, IoHandler handler, IoServiceConfig config, ConnectFuture connectFuture)
             throws IOException
     {
         SocketSessionImpl session = new SocketSessionImpl(this,
                                                           nextProcessor(),
                                                           getListeners(),
                                                           config,
                                                           socket.getChannel(),
                                                           handler,
                                                           socket.getRemoteSocketAddress());

         newSession(session, config, connectFuture);
     }

     private void newSession(SocketChannel ch, IoHandler handler, IoServiceConfig config, ConnectFuture connectFuture)
             throws IOException

     {
         SocketSessionImpl session = new SocketSessionImpl(this,
                                                           nextProcessor(),
                                                           getListeners(),
                                                           config,
                                                           ch,
                                                           handler,
                                                           ch.socket().getRemoteSocketAddress());

         newSession(session, config, connectFuture);
     }

     private void newSession(SocketSessionImpl session, IoServiceConfig config, ConnectFuture connectFuture)
             throws IOException
     {
         try
         {
             getFilterChainBuilder().buildFilterChain(session.getFilterChain());
             config.getFilterChainBuilder().buildFilterChain(session.getFilterChain());
             config.getThreadModel().buildFilterChain(session.getFilterChain());
         }
         catch (Throwable e)
         {
             throw (IOException) new IOException("Failed to create a session.").initCause(e);
         }
         session.getIoProcessor().addNew(session);
         connectFuture.setSession(session);
     }

     private SocketIoProcessor nextProcessor()
     {
         return ioProcessors[processorDistributor++ % processorCount];
     }

     public void setOpenSocket(Socket openSocket)
     {
         _openSocket = openSocket;
     }

     private class Worker implements Runnable
     {
         private long lastActive = System.currentTimeMillis();

         public void run()
         {
             Thread.currentThread().setName(ExistingSocketConnector.this.threadName);

             for (; ;)
             {
                 try
                 {
                     int nKeys = selector.select(1000);

                     registerNew();

                     if (nKeys > 0)
                     {
                         processSessions(selector.selectedKeys());
                     }

                     processTimedOutSessions(selector.keys());

                     if (selector.keys().isEmpty())
                     {
                         if (System.currentTimeMillis() - lastActive > workerTimeout * 1000L)
                         {
                             synchronized (lock)
                             {
                                 if (selector.keys().isEmpty() &&
                                     connectQueue.isEmpty())
                                 {
                                     worker = null;
                                     try
                                     {
                                         selector.close();
                                     }
                                     catch (IOException e)
                                     {
                                         ExceptionMonitor.getInstance().exceptionCaught(e);
                                     }
                                     finally
                                     {
                                         selector = null;
                                     }
                                     break;
                                 }
                             }
                         }
                     }
                     else
                     {
                         lastActive = System.currentTimeMillis();
                     }
                 }
                 catch (IOException e)
                 {
                     ExceptionMonitor.getInstance().exceptionCaught(e);

                     try
                     {
                         Thread.sleep(1000);
                     }
                     catch (InterruptedException e1)
                     {
                         ExceptionMonitor.getInstance().exceptionCaught(e1);
                     }
                 }
             }
         }
     }

     private class ConnectionRequest extends DefaultConnectFuture
     {
         private final SocketChannel channel;
         private final long deadline;
         private final IoHandler handler;
         private final IoServiceConfig config;

         private ConnectionRequest(SocketChannel channel, IoHandler handler, IoServiceConfig config)
         {
             this.channel = channel;
             long timeout;
             if (config instanceof IoConnectorConfig)
             {
                 timeout = ((IoConnectorConfig) config).getConnectTimeoutMillis();
             }
             else
             {
                 timeout = ((IoConnectorConfig) getDefaultConfig()).getConnectTimeoutMillis();
             }
             this.deadline = System.currentTimeMillis() + timeout;
             this.handler = handler;
             this.config = config;
         }
     }
 }
	/*
	* 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 org.apache.mina.transport.socket.nio;

	import edu.emory.mathcs.backport.java.util.concurrent.Executor;
	import org.apache.mina.common.ConnectFuture;
	import org.apache.mina.common.ExceptionMonitor;
	import org.apache.mina.common.IoConnector;
	import org.apache.mina.common.IoConnectorConfig;
	import org.apache.mina.common.IoHandler;
	import org.apache.mina.common.IoServiceConfig;
	import org.apache.mina.common.support.BaseIoConnector;
	import org.apache.mina.common.support.DefaultConnectFuture;
	import org.apache.mina.util.NamePreservingRunnable;
	import org.apache.mina.util.NewThreadExecutor;
	import org.apache.mina.util.Queue;

	import java.io.IOException;
	import java.net.ConnectException;
	import java.net.Socket;
	import java.net.SocketAddress;
	import java.nio.channels.SelectionKey;
	import java.nio.channels.Selector;
	import java.nio.channels.SocketChannel;
	import java.util.Iterator;
	import java.util.Set;

	/**
	* {@link IoConnector} for socket transport (TCP/IP).
	*
	* @author The Apache Directory Project (mina-dev@directory.apache.org)
	* @version $Rev: 627427 $, $Date: 2008-02-13 14:39:10 +0000 (Wed, 13 Feb 2008) $
	*/
	public class ExistingSocketConnector extends BaseIoConnector
	{
	/** @noinspection StaticNonFinalField */
	private static volatile int nextId = 0;

	private final Object lock = new Object();
	private final int id = nextId++;
	private final String threadName = "SocketConnector-" + id;
	private SocketConnectorConfig defaultConfig = new SocketConnectorConfig();
	private final Queue connectQueue = new Queue();
	private final SocketIoProcessor[] ioProcessors;
	private final int processorCount;
	private final Executor executor;

	/** @noinspection FieldAccessedSynchronizedAndUnsynchronized */
	private Selector selector;
	private Worker worker;
	private int processorDistributor = 0;
	private int workerTimeout = 60; // 1 min.
	private Socket _openSocket = null;

	/** Create a connector with a single processing thread using a NewThreadExecutor */
	public ExistingSocketConnector()
	{
	this(1, new NewThreadExecutor());
	}

	/**
	* Create a connector with the desired number of processing threads
	*
	* @param processorCount Number of processing threads
	* @param executor Executor to use for launching threads
	*/
	public ExistingSocketConnector(int processorCount, Executor executor)
	{
	if (processorCount < 1)
	{
	throw new IllegalArgumentException("Must have at least one processor");
	}

	this.executor = executor;
	this.processorCount = processorCount;
	ioProcessors = new SocketIoProcessor[processorCount];

	for (int i = 0; i < processorCount; i++)
	{
	ioProcessors[i] = new SocketIoProcessor("SocketConnectorIoProcessor-" + id + "." + i, executor);
	}
	}

	/**
	* How many seconds to keep the connection thread alive between connection requests
	*
	* @return Number of seconds to keep connection thread alive
	*/
	public int getWorkerTimeout()
	{
	return workerTimeout;
	}

	/**
	* Set how many seconds the connection worker thread should remain alive once idle before terminating itself.
	*
	* @param workerTimeout Number of seconds to keep thread alive. Must be >=0
	*/
	public void setWorkerTimeout(int workerTimeout)
	{
	if (workerTimeout < 0)
	{
	throw new IllegalArgumentException("Must be >= 0");
	}
	this.workerTimeout = workerTimeout;
	}

	public ConnectFuture connect(SocketAddress address, IoHandler handler, IoServiceConfig config)
	{
	return connect(address, null, handler, config);
	}

	public ConnectFuture connect(SocketAddress address, SocketAddress localAddress,
	IoHandler handler, IoServiceConfig config)
	{
	/** Changes here from the Mina OpenSocketConnector.
	* Ignoreing all address as they are not needed */

	if (handler == null)
	{
	throw new NullPointerException("handler");
	}


	if (config == null)
	{
	config = getDefaultConfig();
	}

	if (_openSocket == null)
	{
	throw new IllegalArgumentException("Specifed Socket not active");
	}

	boolean success = false;

	try
	{
	DefaultConnectFuture future = new DefaultConnectFuture();
	newSession(_openSocket, handler, config, future);
	success = true;
	return future;
	}
	catch (IOException e)
	{
	return DefaultConnectFuture.newFailedFuture(e);
	}
	finally
	{
	if (!success && _openSocket != null)
	{
	try
	{
	_openSocket.close();
	}
	catch (IOException e)
	{
	ExceptionMonitor.getInstance().exceptionCaught(e);
	}
	}
	}
	}

	public IoServiceConfig getDefaultConfig()
	{
	return defaultConfig;
	}

	/**
	* Sets the config this connector will use by default.
	*
	* @param defaultConfig the default config.
	*
	* @throws NullPointerException if the specified value is <code>null</code>.
	*/
	public void setDefaultConfig(SocketConnectorConfig defaultConfig)
	{
	if (defaultConfig == null)
	{
	throw new NullPointerException("defaultConfig");
	}
	this.defaultConfig = defaultConfig;
	}

	private synchronized void startupWorker() throws IOException
	{
	if (worker == null)
	{
	selector = Selector.open();
	worker = new Worker();
	executor.execute(new NamePreservingRunnable(worker));
	}
	}

	private void registerNew()
	{
	if (connectQueue.isEmpty())
	{
	return;
	}

	for (; ;)
	{
	ConnectionRequest req;
	synchronized (connectQueue)
	{
	req = (ConnectionRequest) connectQueue.pop();
	}

	if (req == null)
	{
	break;
	}

	SocketChannel ch = req.channel;
	try
	{
	ch.register(selector, SelectionKey.OP_CONNECT, req);
	}
	catch (IOException e)
	{
	req.setException(e);
	}
	}
	}

	private void processSessions(Set keys)
	{
	Iterator it = keys.iterator();

	while (it.hasNext())
	{
	SelectionKey key = (SelectionKey) it.next();

	if (!key.isConnectable())
	{
	continue;
	}

	SocketChannel ch = (SocketChannel) key.channel();
	ConnectionRequest entry = (ConnectionRequest) key.attachment();

	boolean success = false;
	try
	{
	ch.finishConnect();
	newSession(ch, entry.handler, entry.config, entry);
	success = true;
	}
	catch (Throwable e)
	{
	entry.setException(e);
	}
	finally
	{
	key.cancel();
	if (!success)
	{
	try
	{
	ch.close();
	}
	catch (IOException e)
	{
	ExceptionMonitor.getInstance().exceptionCaught(e);
	}
	}
	}
	}

	keys.clear();
	}

	private void processTimedOutSessions(Set keys)
	{
	long currentTime = System.currentTimeMillis();
	Iterator it = keys.iterator();

	while (it.hasNext())
	{
	SelectionKey key = (SelectionKey) it.next();

	if (!key.isValid())
	{
	continue;
	}

	ConnectionRequest entry = (ConnectionRequest) key.attachment();

	if (currentTime >= entry.deadline)
	{
	entry.setException(new ConnectException());
	try
	{
	key.channel().close();
	}
	catch (IOException e)
	{
	ExceptionMonitor.getInstance().exceptionCaught(e);
	}
	finally
	{
	key.cancel();
	}
	}
	}
	}

	private void newSession(Socket socket, IoHandler handler, IoServiceConfig config, ConnectFuture connectFuture)
	throws IOException
	{
	SocketSessionImpl session = new SocketSessionImpl(this,
	nextProcessor(),
	getListeners(),
	config,
	socket.getChannel(),
	handler,
	socket.getRemoteSocketAddress());

	newSession(session, config, connectFuture);
	}

	private void newSession(SocketChannel ch, IoHandler handler, IoServiceConfig config, ConnectFuture connectFuture)
	throws IOException

	{
	SocketSessionImpl session = new SocketSessionImpl(this,
	nextProcessor(),
	getListeners(),
	config,
	ch,
	handler,
	ch.socket().getRemoteSocketAddress());

	newSession(session, config, connectFuture);
	}

	private void newSession(SocketSessionImpl session, IoServiceConfig config, ConnectFuture connectFuture)
	throws IOException
	{
	try
	{
	getFilterChainBuilder().buildFilterChain(session.getFilterChain());
	config.getFilterChainBuilder().buildFilterChain(session.getFilterChain());
	config.getThreadModel().buildFilterChain(session.getFilterChain());
	}
	catch (Throwable e)
	{
	throw (IOException) new IOException("Failed to create a session.").initCause(e);
	}
	session.getIoProcessor().addNew(session);
	connectFuture.setSession(session);
	}

	private SocketIoProcessor nextProcessor()
	{
	return ioProcessors[processorDistributor++ % processorCount];
	}

	public void setOpenSocket(Socket openSocket)
	{
	_openSocket = openSocket;
	}

	private class Worker implements Runnable
	{
	private long lastActive = System.currentTimeMillis();

	public void run()
	{
	Thread.currentThread().setName(ExistingSocketConnector.this.threadName);

	for (; ;)
	{
	try
	{
	int nKeys = selector.select(1000);

	registerNew();

	if (nKeys > 0)
	{
	processSessions(selector.selectedKeys());
	}

	processTimedOutSessions(selector.keys());

	if (selector.keys().isEmpty())
	{
	if (System.currentTimeMillis() - lastActive > workerTimeout * 1000L)
	{
	synchronized (lock)
	{
	if (selector.keys().isEmpty() &&
	connectQueue.isEmpty())
	{
	worker = null;
	try
	{
	selector.close();
	}
	catch (IOException e)
	{
	ExceptionMonitor.getInstance().exceptionCaught(e);
	}
	finally
	{
	selector = null;
	}
	break;
	}
	}
	}
	}
	else
	{
	lastActive = System.currentTimeMillis();
	}
	}
	catch (IOException e)
	{
	ExceptionMonitor.getInstance().exceptionCaught(e);

	try
	{
	Thread.sleep(1000);
	}
	catch (InterruptedException e1)
	{
	ExceptionMonitor.getInstance().exceptionCaught(e1);
	}
	}
	}
	}
	}

	private class ConnectionRequest extends DefaultConnectFuture
	{
	private final SocketChannel channel;
	private final long deadline;
	private final IoHandler handler;
	private final IoServiceConfig config;

	private ConnectionRequest(SocketChannel channel, IoHandler handler, IoServiceConfig config)
	{
	this.channel = channel;
	long timeout;
	if (config instanceof IoConnectorConfig)
	{
	timeout = ((IoConnectorConfig) config).getConnectTimeoutMillis();
	}
	else
	{
	timeout = ((IoConnectorConfig) getDefaultConfig()).getConnectTimeoutMillis();
	}
	this.deadline = System.currentTimeMillis() + timeout;
	this.handler = handler;
	this.config = config;
	}
	}
	}