/*
* Created on Oct 28, 2005
* Created by Alon Rohter
* Copyright (C) 2005, 2006 Aelitis, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 46,603.30 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
package com.aelitis.azureus.core.clientmessageservice.impl;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import org.gudy.azureus2.core3.util.AEMonitor;
import com.aelitis.azureus.core.networkmanager.*;
import com.aelitis.azureus.core.networkmanager.impl.OutgoingMessageQueueImpl;
import com.aelitis.azureus.core.networkmanager.impl.tcp.ProtocolEndpointTCP;
import com.aelitis.azureus.core.networkmanager.impl.tcp.TCPTransportImpl;
import com.aelitis.azureus.core.networkmanager.impl.tcp.TransportEndpointTCP;
import com.aelitis.azureus.core.peermanager.messaging.Message;
import com.aelitis.azureus.core.peermanager.messaging.azureus.*;
/**
*
*/
public class ClientConnection {
private Transport parent_transport;
private final Transport light_transport;
private final OutgoingMessageQueue out_queue;
private final AZMessageDecoder decoder;
private static final AZMessageEncoder encoder = new AZMessageEncoder( false );
private long last_activity_time;
private final AEMonitor msg_mon = new AEMonitor( "ClientConnection" );
private final ArrayList sending_msgs = new ArrayList();
private Map user_data;
private boolean close_pending;
private boolean closed;
private boolean last_write_made_progress;
private String debug_string = "<>";
private Throwable closing_reason;
/**
* Create a new connection based on an incoming socket.
* @param channel
*/
public ClientConnection( SocketChannel channel ) {
decoder = new AZMessageDecoder();
InetSocketAddress remote = null; // unfortunately we don't have an address at this point (see NATTestService)
ProtocolEndpointTCP pe = new ProtocolEndpointTCP( remote );
light_transport = pe.connectLightWeight( channel );
out_queue = new OutgoingMessageQueueImpl( encoder );
out_queue.setTransport( light_transport );
last_activity_time = System.currentTimeMillis();
}
/**
* Create a new connection based on an already-established outgoing socket.
* @param transport parent
*/
public ClientConnection( TCPTransportImpl transport ) {
this( transport.getSocketChannel() ); //run as a lightweight
parent_transport = transport; //save parent for close
}
/**
* Get any messages read from the client.
* @return read messages, or null of no new messages were read
* @throws IOException on error
*/
public Message[] readMessages() throws IOException {
int bytes_read = decoder.performStreamDecode( light_transport, 1024*1024 );
if( bytes_read > 0 ) last_activity_time = System.currentTimeMillis();
return decoder.removeDecodedMessages();
}
public boolean
getLastReadMadeProgress()
{
return( decoder.getLastReadMadeProgress());
}
public boolean
getLastWriteMadeProgress()
{
return( last_write_made_progress );
}
public void sendMessage( final ClientMessage client_msg, final Message msg ) {
try{ msg_mon.enter();
sending_msgs.add( client_msg );
}
finally{ msg_mon.exit(); }
out_queue.registerQueueListener( new OutgoingMessageQueue.MessageQueueListener() {
public boolean messageAdded( Message message ){ return true; }
public void messageQueued( Message message ){}
public void messageRemoved( Message message ){}
public void protocolBytesSent( int byte_count ){}
public void dataBytesSent( int byte_count ){}
public void messageSent( Message message ){
if( message.equals( msg ) ) {
try{ msg_mon.enter();
sending_msgs.remove( client_msg );
}
finally{ msg_mon.exit(); }
client_msg.reportComplete();
}
}
});
out_queue.addMessage( msg, false );
}
/**
* Write any queued messages back to the client.
* @return true if more writing is required, false if all message data has been sent
* @throws IOException on error
*/
public boolean writeMessages() throws IOException {
int bytes_written = out_queue.deliverToTransport( 1024*1024, false );
if( bytes_written > 0 ) last_activity_time = System.currentTimeMillis();
last_write_made_progress = bytes_written > 0;
return out_queue.getTotalSize() > 0;
}
//public boolean hasDataToSend() {
// return out_queue.getTotalSize() > 0;
//}
public void close( Throwable reason ) {
ClientMessage[] messages = null;
try{ msg_mon.enter();
if ( closed ){
return;
}
closed = true;
if( !sending_msgs.isEmpty() ) {
messages = (ClientMessage[])sending_msgs.toArray( new ClientMessage[sending_msgs.size()] );
}
}
finally{ msg_mon.exit(); }
if( messages != null ) {
if ( reason == null ){
reason = new Exception( "Connection closed" );
}
for( int i=0; i < messages.length; i++ ) {
ClientMessage msg = messages[i];
msg.reportFailed( reason );
}
}
decoder.destroy();
out_queue.destroy();
if( parent_transport != null ) {
parent_transport.close( "Tidy close"); //have the parent do the close if possible
}
else {
light_transport.close("Tidy close");
}
}
/**
* Marks the socket as complete and ready to undergo any close-delay prior to it being closed
* by the server
*/
public void
closePending()
{
last_activity_time = System.currentTimeMillis();
close_pending = true;
}
public boolean
isClosePending()
{
return( close_pending );
}
public SocketChannel getSocketChannel(){ return ((TransportEndpointTCP)light_transport.getTransportEndpoint()).getSocketChannel(); }
/**
* Get the last time this connection had read or write activity.
* @return system time of last activity
*/
public long getLastActivityTime() { return last_activity_time; }
/**
* Reset the last activity time to the current time.
*/
public void resetLastActivityTime() { last_activity_time = System.currentTimeMillis(); }
public void
setClosingReason(
Throwable r )
{
closing_reason = r;
}
public Throwable
getClosingReason()
{
return( closing_reason );
}
public Object
getUserData(
Object key )
{
Map m = user_data;
if ( m == null ){
return( null );
}
return( m.get(key));
}
public void
setUserData(
Object key,
Object data )
{
try{
msg_mon.enter();
// assumption is write infrequently, read often -> copy-on-write
Map m = (user_data==null)?new HashMap():new HashMap( user_data );
m.put( key, data );
user_data = m;
}finally{
msg_mon.exit();
}
}
public void setDebugString( String debug ) { debug_string = debug; }
public String getDebugString() { return debug_string; }
public void
setMaximumMessageSize(
int max_bytes )
{
if ( decoder != null ){
decoder.setMaximumMessageSize( max_bytes );
}
}
}
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