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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.
//
// **********************************************************************
using System;
using System.Collections;
using Demo;
public class QueueI : QueueDisp_
{
public override 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.
//
lock(this)
{
if(_messageQueue.Count != 0)
{
try
{
cb.ice_response((string)_messageQueue[0]);
_messageQueue.RemoveAt(0);
}
catch(Ice.Exception ex)
{
Console.Error.WriteLine(ex);
}
}
else
{
Request request = new Request();
request.id = id;
request.cb = cb;
_requestQueue.Add(request);
}
}
}
public override 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.
//
lock(this)
{
if(_requestQueue.Count != 0)
{
try
{
Request request = (Request)_requestQueue[0];
request.cb.ice_response(message);
}
catch(Ice.Exception ex)
{
Console.Error.WriteLine(ex);
}
_requestQueue.RemoveAt(0);
}
else
{
_messageQueue.Add(message);
}
}
}
public override 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)
{
foreach(Request r in _requestQueue)
{
if(r.id.Equals(ids[i]))
{
try
{
r.cb.ice_exception(new RequestCanceledException());
}
catch(Ice.Exception)
{
// Ignore
}
_requestQueue.Remove(r);
break;
}
}
}
}
class Request
{
public string id;
public AMD_Queue_get cb;
}
private ArrayList _messageQueue = new ArrayList();
private ArrayList _requestQueue = new ArrayList();
}
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