/*
*
* 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.qpid.proton.driver.impl;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Collections;
import java.util.Iterator;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.qpid.proton.driver.Connector;
import org.apache.qpid.proton.driver.Driver;
import org.apache.qpid.proton.driver.Listener;
import org.apache.qpid.proton.engine.impl.SaslClientImpl;
import org.apache.qpid.proton.engine.impl.SaslServerImpl;
public class DriverImpl implements Driver
{
private Selector _selector;
private Set<SelectionKey> _selectedKeys = Collections.emptySet();
private Logger _logger = Logger.getLogger("proton.driver");
public DriverImpl() throws IOException
{
_selector = Selector.open();
}
public void wakeup()
{
_selector.wakeup();
}
public void doWait(int timeout)
{
try
{
_selector.select(timeout);
_selectedKeys = _selector.selectedKeys();
}
catch (IOException e)
{
_logger.log(Level.SEVERE, "Exception when waiting for IO Event",e);
throw new RuntimeException(e);
}
}
@SuppressWarnings("rawtypes")
public Listener listener()
{
Listener listener = null;
listener = getFirstListener();
if(listener == null)
{
try
{
selectNow();
}
catch (IOException e)
{
_logger.log(Level.SEVERE, "Exception when selecting",e);
throw new RuntimeException(e);
}
listener = getFirstListener();
}
return listener;
}
private void selectNow() throws IOException
{
_selector.selectNow();
_selectedKeys = _selector.selectedKeys();
}
@SuppressWarnings("rawtypes")
private Listener getFirstListener()
{
Iterator<SelectionKey> selectedIter = _selectedKeys.iterator();
while(selectedIter.hasNext())
{
SelectionKey key = selectedIter.next();
selectedIter.remove();
if(key.isAcceptable())
{
return (Listener) key.attachment();
}
}
return null;
}
@SuppressWarnings("rawtypes")
public Connector connector()
{
Connector connector = null;
connector = getFirstConnector();
if(connector == null)
{
try
{
selectNow();
}
catch (IOException e)
{
_logger.log(Level.SEVERE, "Exception when selecting",e);
throw new RuntimeException(e);
}
connector = getFirstConnector();
}
return connector;
}
@SuppressWarnings("rawtypes")
private Connector getFirstConnector()
{
Iterator<SelectionKey> selectedIter = _selectedKeys.iterator();
while(selectedIter.hasNext())
{
SelectionKey key = selectedIter.next();
selectedIter.remove();
if(key.isReadable() || key.isWritable())
{
return (Connector) key.attachment();
}
}
return null;
}
public void destroy()
{
try
{
_selector.close();
}
catch (IOException e)
{
_logger.log(Level.SEVERE, "Exception when closing selector",e);
throw new RuntimeException(e);
}
}
public <C> Listener<C> createListener(String host, int port, C context)
{
try
{
ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
serverSocketChannel.configureBlocking(false);
ServerSocket serverSocket = serverSocketChannel.socket();
serverSocket.bind(new InetSocketAddress(host, port));
return createListener(serverSocketChannel, context);
}
catch (ClosedChannelException e)
{
e.printStackTrace(); // TODO - Implement
}
catch (IOException e)
{
e.printStackTrace(); // TODO - Implement
}
return null;
}
public <C> Listener<C> createListener(ServerSocketChannel c, C context)
{
Listener<C> l = new ListenerImpl<C>(this, c, context);
SelectionKey key = registerInterest(c,SelectionKey.OP_ACCEPT);
key.attach(l);
return l;
}
public <C> Connector<C> createConnector(String host, int port, C context)
{
try
{
SocketChannel channel = SocketChannel.open();
channel.configureBlocking(false);
channel.connect(new InetSocketAddress(host, port));
return createConnector(channel, context);
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
throw new RuntimeException(e);
}
}
public <C> Connector<C> createConnector(SelectableChannel c, C context)
{
SelectionKey key = registerInterest(c,SelectionKey.OP_READ);
Connector<C> co = new ConnectorImpl<C>(this, null, new SaslClientImpl(),(SocketChannel)c, context, key);
key.attach(co);
return co;
}
protected <C> Connector<C> createServerConnector(SelectableChannel c, C context, Listener<C> l)
{
SelectionKey key = registerInterest(c,SelectionKey.OP_READ);
Connector<C> co = new ConnectorImpl<C>(this, l, new SaslServerImpl(),(SocketChannel)c, context, key);
key.attach(co);
return co;
}
private <C> SelectionKey registerInterest(SelectableChannel c, int opKeys)
{
try
{
return c.register(_selector, opKeys);
}
catch (ClosedChannelException e)
{
e.printStackTrace(); // TODO - Implement
throw new RuntimeException(e);
}
}
}