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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.qpid.server.cluster;
import org.apache.mina.common.IoSession;
import org.apache.qpid.AMQException;
import org.apache.qpid.codec.AMQCodecFactory;
import org.apache.qpid.server.AMQChannel;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.protocol.AMQMinaProtocolSession;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.queue.AMQMessage;
import org.apache.qpid.server.queue.QueueRegistry;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.registry.IApplicationRegistry;
import org.apache.qpid.server.state.AMQStateManager;
public class ClusteredProtocolSession extends AMQMinaProtocolSession
{
private MemberHandle _peer;
public ClusteredProtocolSession(IoSession session, QueueRegistry queueRegistry, ExchangeRegistry exchangeRegistry, AMQCodecFactory codecFactory, AMQStateManager stateManager)
throws AMQException
{
super(session, queueRegistry, exchangeRegistry, codecFactory, stateManager);
}
public boolean isPeerSession()
{
return _peer != null;
}
public void setSessionPeer(MemberHandle peer)
{
_peer = peer;
}
public MemberHandle getSessionPeer()
{
return _peer;
}
public AMQChannel getChannel(int channelId)
throws AMQException
{
AMQChannel channel = super.getChannel(channelId);
if (isPeerSession() && channel == null)
{
channel = new OneUseChannel(channelId);
addChannel(channel);
}
return channel;
}
public static boolean isPeerSession(IoSession session)
{
return isPeerSession(getAMQProtocolSession(session));
}
public static boolean isPeerSession(AMQProtocolSession session)
{
return session instanceof ClusteredProtocolSession && ((ClusteredProtocolSession) session).isPeerSession();
}
public static void setSessionPeer(AMQProtocolSession session, MemberHandle peer)
{
((ClusteredProtocolSession) session).setSessionPeer(peer);
}
public static MemberHandle getSessionPeer(AMQProtocolSession session)
{
return ((ClusteredProtocolSession) session).getSessionPeer();
}
public static MemberHandle getSessionPeer(IoSession session)
{
return getSessionPeer(getAMQProtocolSession(session));
}
/**
* Cleans itself up after delivery of a message (publish frame, header and optional body frame(s))
*/
private class OneUseChannel extends AMQChannel
{
public OneUseChannel(int channelId)
throws AMQException
{
this(channelId, ApplicationRegistry.getInstance());
}
public OneUseChannel(int channelId, IApplicationRegistry registry)
throws AMQException
{
super(channelId,
registry.getMessageStore(),
registry.getExchangeRegistry());
}
protected void routeCurrentMessage() throws AMQException
{
super.routeCurrentMessage();
removeChannel(getChannelId());
}
}
public static boolean isPayloadFromPeer(AMQMessage payload)
{
return isPeerSession(payload.getPublisher());
}
public static boolean canRelay(AMQMessage payload, MemberHandle target)
{
//can only relay client messages that have not already been relayed to the given target
return !isPayloadFromPeer(payload) && !payload.checkToken(target);
}
}
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