/*
* Created on May 8, 2004
* Created by Alon Rohter
* Copyright (C) 2004, 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.networkmanager;
import java.io.IOException;
import com.aelitis.azureus.core.peermanager.messaging.*;
/**
* Priority-based outbound peer message queue.
*/
public interface
OutgoingMessageQueue
{
public void
setTransport(
Transport _transport );
public int
getMssSize();
/**
* Set the message stream encoder that will be used to encode outgoing messages.
* @param stream_encoder to use
*/
public void setEncoder( MessageStreamEncoder stream_encoder ) ;
public MessageStreamEncoder
getEncoder();
/**
* Get the percentage of the current message that has already been sent out.
* @return percentage complete (0-99), or -1 if no message is currently being sent
*/
public int getPercentDoneOfCurrentMessage();
/**
* Destroy this queue; i.e. perform cleanup actions.
*/
public void destroy();
public boolean
isDestroyed();
/**
* Get the total number of bytes ready to be transported.
* @return total bytes remaining
*/
public int getTotalSize();
/**
* Whether or not an urgent message (one that needs an immediate send, i.e. a no-delay message) is queued.
* @return true if there's a message tagged for immediate write
*/
public boolean hasUrgentMessage();
/**
* Add a message to the message queue.
* NOTE: Allows for manual listener notification at some later time,
* using doListenerNotifications(), instead of notifying immediately
* from within this method. This is useful if you want to invoke
* listeners outside of some greater synchronised block to avoid
* deadlock.
* @param message message to add
* @param manual_listener_notify true for manual notification, false for automatic
*/
public void addMessage( Message message, boolean manual_listener_notify ) ;
/**
* Remove all messages of the given types from the queue.
* NOTE: Allows for manual listener notification at some later time,
* using doListenerNotifications(), instead of notifying immediately
* from within this method. This is useful if you want to invoke
* listeners outside of some greater synchronised block to avoid
* deadlock.
* @param message_types type to remove
* @param manual_listener_notify true for manual notification, false for automatic
*/
public void removeMessagesOfType( Message[] message_types, boolean manual_listener_notify );
/**
* Remove a particular message from the queue.
* NOTE: Only the original message found in the queue will be destroyed upon removal,
* which may not necessarily be the one passed as the method parameter,
* as some messages override equals() (i.e. BTRequest messages) instead of using reference
* equality, and could be a completely different object, and would need to be destroyed
* manually. If the message does not override equals, then any such method will likely
* *not* be found and removed, as internal queued object was a new allocation on insertion.
* NOTE: Allows for manual listener notification at some later time,
* using doListenerNotifications(), instead of notifying immediately
* from within this method. This is useful if you want to invoke
* listeners outside of some greater synchronised block to avoid
* deadlock.
* @param message to remove
* @param manual_listener_notify true for manual notification, false for automatic
* @return true if the message was removed, false otherwise
*/
public boolean removeMessage( Message message, boolean manual_listener_notify );
/**
* Deliver (write) message(s) data to the underlying transport.
*
* NOTE: Allows for manual listener notification at some later time,
* using doListenerNotifications(), instead of notifying immediately
* from within this method. This is useful if you want to invoke
* listeners outside of some greater synchronised block to avoid
* deadlock.
* @param max_bytes maximum number of bytes to deliver
* @param manual_listener_notify true for manual notification, false for automatic
* @return number of bytes delivered
* @throws IOException on delivery error
*/
public int deliverToTransport( int max_bytes, boolean manual_listener_notify ) throws IOException;
/**
* Manually send any unsent listener notifications.
*/
public void doListenerNotifications();
public void
setTrace(
boolean on );
public String getQueueTrace();
/**
* Add a listener to be notified of queue events.
* @param listener
*/
public void registerQueueListener( MessageQueueListener listener );
/**
* Cancel queue event notification listener.
* @param listener
*/
public void cancelQueueListener( MessageQueueListener listener );
/**
* Notifty the queue (and its listeners) of a message sent externally on the queue's behalf.
* @param message sent externally
*/
public void notifyOfExternallySentMessage( Message message );
/////////////////////////////////////////////////////////////////
/**
* Receive notification of queue events.
*/
public interface MessageQueueListener {
/**
* The given message has just been added to the queue.
* @param message added for queuing
* @return true if this message addition is allowed, false if it should be immediately removed without being queued or sent
*/
public boolean messageAdded( Message message );
/**
* The given message has just been queued for sending out the transport.
* @param message queued
*/
public void messageQueued( Message message );
/**
* The given message has just been forcibly removed from the queue,
* i.e. it was *not* sent out the transport.
* @param message removed
*/
public void messageRemoved( Message message );
/**
* The given message has been completely sent out through the transport.
* @param message sent
*/
public void messageSent( Message message );
/**
* The given number of protocol (overhead) bytes has been written to the transport.
* @param byte_count number of protocol bytes
*/
public void protocolBytesSent( int byte_count );
/**
* The given number of (piece) data bytes has been written to the transport.
* @param byte_count number of data bytes
*/
public void dataBytesSent( int byte_count );
}
}
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