/*
* JacORB - a free Java ORB
*
* Copyright (C) 1999-2004 Gerald Brose
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
package org.jacorb.notification.queue;
import org.jacorb.notification.interfaces.Message;
import org.jacorb.notification.queue.MessageQueue.DiscardListener;
/**
* @author Alphonse Bendt
* @version $Id: DefaultMessageQueueAdapter.java,v 1.1 2006-02-25 15:28:40 alphonse.bendt Exp $
*/
public class DefaultMessageQueueAdapter implements MessageQueueAdapter
{
private final MessageQueue queue_;
private static final Message[] EMPTY = new Message[0];
public DefaultMessageQueueAdapter(MessageQueue queue)
{
super();
queue_ = queue;
}
/*
* @see org.jacorb.notification.queue.EventQueueDelegate#enqeue(org.jacorb.notification.interfaces.Message)
*/
public void enqeue(Message message)
{
queue_.put(message);
}
/*
* (non-Javadoc)
*
* @see org.jacorb.notification.queue.EventQueueDelegate#hasPendingData()
*/
public boolean hasPendingMessages()
{
return !queue_.isEmpty();
}
/*
* (non-Javadoc)
*
* @see org.jacorb.notification.queue.EventQueueDelegate#getPendingMessagesCount()
*/
public int getPendingMessagesCount()
{
return queue_.getSize();
}
/*
* caller gets ownership over the returned message
*
* @see org.jacorb.notification.queue.EventQueueDelegate#getMessageBlocking()
*/
public Message getMessageBlocking() throws InterruptedException
{
return queue_.getMessage(true);
}
/*
* caller gets ownership over the returned message
*
* @see org.jacorb.notification.queue.EventQueueDelegate#getMessageNoBlock()
*/
public Message getMessageNoBlock() throws InterruptedException
{
return queue_.getMessage(false);
}
/*
* caller gets ownership over the returned message
*
* @see org.jacorb.notification.queue.EventQueueDelegate#getAllMessages()
*/
public Message[] getAllMessages() throws InterruptedException
{
return queue_.getAllMessages(false);
}
/*
* caller gets ownership over the returned message
*
* @see org.jacorb.notification.queue.EventQueueDelegate#getUpToMessages(int)
*/
public Message[] getUpToMessages(int max) throws InterruptedException
{
return queue_.getMessages(max, false);
}
/*
* caller gets ownership over the returned message
*
* @see org.jacorb.notification.queue.EventQueueDelegate#getAtLeastMessages(int)
*/
public Message[] getAtLeastMessages(int min) throws InterruptedException
{
if (queue_.getSize() >= min)
{
return queue_.getAllMessages(true);
}
return EMPTY;
}
public void clear()
{
try
{
Message[] allMessages = queue_.getAllMessages(false);
for (int i = 0; i < allMessages.length; i++)
{
Message message = allMessages[i];
message.dispose();
}
} catch (InterruptedException e)
{
// should not happen as above call does not wait.
}
}
public String toString()
{
return queue_.toString();
}
public String getDiscardPolicyName()
{
return queue_.getDiscardPolicyName();
}
public String getOrderPolicyName()
{
return queue_.getOrderPolicyName();
}
public void addDiscardListener(DiscardListener listener)
{
queue_.addDiscardListener(listener);
}
public void removeDiscardListener(DiscardListener listener)
{
queue_.removeDiscardListener(listener);
}
}