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// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
import Demo.*;
public class QueueI extends _QueueDisp
{
synchronized public void
get_async(AMD_Queue_get cb, String id, Ice.Current current)
{
//
// If there is already a message in the message queue, send the
// response immediately. Otherwise add the callback to the
// request queue.
//
if(_messageQueue.size() != 0)
{
try
{
cb.ice_response((String)_messageQueue.getFirst());
_messageQueue.removeFirst();
}
catch(Ice.LocalException ex)
{
ex.printStackTrace();
}
}
else
{
Request request = new Request();
request.id = id;
request.cb = cb;
_requestQueue.add(request);
}
}
synchronized public void
add(String message, Ice.Current current)
{
//
// If there is an outstanding request in the request queue,
// send a response. Otherwise add the message to the message
// queue.
//
if(_requestQueue.size() != 0)
{
try
{
Request request = (Request)_requestQueue.removeFirst();
request.cb.ice_response(message);
}
catch(Ice.LocalException ex)
{
ex.printStackTrace();
}
}
else
{
_messageQueue.add(message);
}
}
synchronized public void
cancel_async(AMD_Queue_cancel cb, String[] ids, Ice.Current current)
{
//
// We send immediate response so that later call to ice_exception
// on queued requests will not cause deadlocks.
//
cb.ice_response();
for(int i = 0; i < ids.length; ++i)
{
java.util.Iterator p = _requestQueue.iterator();
while(p.hasNext())
{
Request request = (Request)p.next();
if(request.id.equals(ids[i]))
{
try
{
request.cb.ice_exception(new RequestCanceledException());
}
catch(Ice.LocalException ex)
{
// Ignore
}
p.remove();
break;
}
}
}
}
class Request
{
String id;
AMD_Queue_get cb;
}
private java.util.LinkedList _messageQueue = new java.util.LinkedList();
private java.util.LinkedList _requestQueue = new java.util.LinkedList();
}
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