Jetty example source code file (SocketConnector.java)

This example Jetty source code file (SocketConnector.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Jetty tags/keywords

connection, connection, exception, hashset, httpconnection, httpconnection, interruptedexception, io, ioexception, ioexception, net, network, serversocket, serversocket, set, socket, socketconnector, util

The Jetty SocketConnector.java source code

// ========================================================================
// Copyright 2003-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.mortbay.jetty.bio;

import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.mortbay.io.Buffer;
import org.mortbay.io.ByteArrayBuffer;
import org.mortbay.io.EndPoint;
import org.mortbay.io.bio.SocketEndPoint;
import org.mortbay.jetty.AbstractConnector;
import org.mortbay.jetty.EofException;
import org.mortbay.jetty.HttpConnection;
import org.mortbay.jetty.HttpException;
import org.mortbay.jetty.Request;
import org.mortbay.log.Log;


/* ------------------------------------------------------------------------------- */
/**  Socket Connector.
 * This connector implements a traditional blocking IO and threading model.
 * Normal JRE sockets are used and a thread is allocated per connection.
 * Buffers are managed so that large buffers are only allocated to active connections.
 * 
 * This Connector should only be used if NIO is not available.
 * 
 * @org.apache.xbean.XBean element="bioConnector" description="Creates a BIO based socket connector"
 * 
 * @author gregw
 */
public class SocketConnector extends AbstractConnector
{
    protected ServerSocket _serverSocket;
    protected Set _connections;
    
    /* ------------------------------------------------------------ */
    /** Constructor.
     * 
     */
    public SocketConnector()
    {
    }

    /* ------------------------------------------------------------ */
    public Object getConnection()
    {
        return _serverSocket;
    }
    
    /* ------------------------------------------------------------ */
    public void open() throws IOException
    {
        // Create a new server socket and set to non blocking mode
        if (_serverSocket==null || _serverSocket.isClosed())
        _serverSocket= newServerSocket(getHost(),getPort(),getAcceptQueueSize());
        _serverSocket.setReuseAddress(getReuseAddress());
    }

    /* ------------------------------------------------------------ */
    protected ServerSocket newServerSocket(String host, int port,int backlog) throws IOException
    {
        ServerSocket ss= host==null?
            new ServerSocket(port,backlog):
            new ServerSocket(port,backlog,InetAddress.getByName(host));
       
        return ss;
    }
    
    /* ------------------------------------------------------------ */
    public void close() throws IOException
    {
        if (_serverSocket!=null)
            _serverSocket.close();
        _serverSocket=null;
    }

    /* ------------------------------------------------------------ */
    public void accept(int acceptorID)
    	throws IOException, InterruptedException
    {   
        Socket socket = _serverSocket.accept();
        configure(socket);
        
        Connection connection=new Connection(socket);
        connection.dispatch();
    }

    /* ------------------------------------------------------------------------------- */
    /**
     * Allows subclass to override Conection if required.
     */
    protected HttpConnection newHttpConnection(EndPoint endpoint) 
    {
        return new HttpConnection(this, endpoint, getServer());
    }

    /* ------------------------------------------------------------------------------- */
    protected Buffer newBuffer(int size)
    {
        return new ByteArrayBuffer(size);
    }

    /* ------------------------------------------------------------------------------- */
    public void customize(EndPoint endpoint, Request request)
        throws IOException
    {
        Connection connection = (Connection)endpoint;
        if (connection._sotimeout!=_maxIdleTime)
        {
            connection._sotimeout=_maxIdleTime;
            ((Socket)endpoint.getTransport()).setSoTimeout(_maxIdleTime);
        }
              
        super.customize(endpoint, request);
    }

    /* ------------------------------------------------------------------------------- */
    public int getLocalPort()
    {
        if (_serverSocket==null || _serverSocket.isClosed())
            return -1;
        return _serverSocket.getLocalPort();
    }

    /* ------------------------------------------------------------------------------- */
    protected void doStart() throws Exception
    {
        _connections=new HashSet();
        super.doStart();
    }

    /* ------------------------------------------------------------------------------- */
    protected void doStop() throws Exception
    {
        super.doStop();
        Set set=null;

        synchronized(_connections)
        {
            set= new HashSet(_connections);
        }
        
        Iterator iter=set.iterator();
        while(iter.hasNext())
        {
            Connection connection = (Connection)iter.next();
            connection.close();
        }
    }

    /* ------------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------------- */
    /* ------------------------------------------------------------------------------- */
    protected class Connection extends SocketEndPoint implements Runnable
    {
        boolean _dispatched=false;
        HttpConnection _connection;
        int _sotimeout;
        protected Socket _socket;
        
        public Connection(Socket socket) throws IOException
        {
            super(socket);
            _connection = newHttpConnection(this);
            _sotimeout=socket.getSoTimeout();
            _socket=socket;
        }
        
        public void dispatch() throws InterruptedException, IOException
        {
            if (!getThreadPool().dispatch(this))
            {
                Log.warn("dispatch failed for {}",_connection);
                close();
            }
        }
        
        public int fill(Buffer buffer) throws IOException
        {
            int l = super.fill(buffer);
            if (l<0)
                close();
            return l;
        }
        
        public void run()
        {
            try
            {
                connectionOpened(_connection);
                synchronized(_connections)
                {
                    _connections.add(this);
                }
                
                while (isStarted() && !isClosed())
                {
                    if (_connection.isIdle())
                    {
                        if (getServer().getThreadPool().isLowOnThreads())
                        {
                            int lrmit = getLowResourceMaxIdleTime();
                            if (lrmit>=0 && _sotimeout!= lrmit)
                            {
                                _sotimeout=lrmit;
                                _socket.setSoTimeout(_sotimeout);
                            }
                        }
                    }                    
                    _connection.handle();
                }
            }
            catch (EofException e)
            {
                Log.debug("EOF", e);
                try{close();}
                catch(IOException e2){Log.ignore(e2);}
            }
            catch (HttpException e)
            {
                Log.debug("BAD", e);
                try{close();}
                catch(IOException e2){Log.ignore(e2);}
            }
            catch(Throwable e)
            {
                Log.warn("handle failed",e);
                try{close();}
                catch(IOException e2){Log.ignore(e2);}
            }
            finally
            { 
                connectionClosed(_connection);
                synchronized(_connections)
                {
                    _connections.remove(this);
                }
            }
        }
    }
}