package org.red5.server.net.rtmp;
/*
* RED5 Open Source Flash Server - http://www.osflash.org/red5
*
* Copyright (c) 2006-2007 by respective authors (see below). All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.lang.ref.WeakReference;
import org.red5.server.api.service.IPendingServiceCall;
import org.red5.server.net.rtmp.event.Invoke;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Can be returned to delay returning the result of invoked methods.
*
* @author The Red5 Project (red5@osflash.org)
* @author Joachim Bauch (jojo@struktur.de)
*/
public class DeferredResult {
/**
* Logger
*/
protected static Logger log = LoggerFactory.getLogger(DeferredResult.class);
/**
* Weak reference to used channel
*/
private WeakReference<Channel> channel;
/**
* Pending call object
*/
private IPendingServiceCall call;
/**
* Invocation id
*/
private int invokeId;
/**
* Results sent flag
*/
private boolean resultSent = false;
/**
* Set the result of a method call and send to the caller.
*
* @param result
* deferred result of the method call
*/
public void setResult(Object result) {
if (this.resultSent)
throw new RuntimeException("You can only set the result once.");
this.resultSent = true;
Channel channel = this.channel.get();
if (channel == null) {
log.warn("The client is no longer connected.");
return;
}
Invoke reply = new Invoke();
call.setResult(result);
reply.setCall(call);
reply.setInvokeId(invokeId);
channel.write(reply);
channel.getConnection().unregisterDeferredResult(this);
}
/**
* Check if the result has been sent to the client.
*
* @return <code>true</code> if the result has been sent, otherwise <code>false</code>
*/
public boolean wasSent() {
return resultSent;
}
/**
* Setter for invoke Id.
*
* @param id Invocation object identifier
*/
protected void setInvokeId(int id) {
this.invokeId = id;
}
/**
* Setter for service call.
*
* @param call Service call
*/
protected void setServiceCall(IPendingServiceCall call) {
this.call = call;
}
/**
* Setter for channel.
*
* @param channel Channel
*/
protected void setChannel(Channel channel) {
this.channel = new WeakReference<Channel>(channel);
}
}