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package org.apache.qpid.server.handler;
import org.apache.qpid.framing.*;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.queue.QueueRegistry;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.virtualhost.VirtualHost;
import org.apache.qpid.protocol.AMQMethodEvent;
import org.apache.qpid.AMQException;
import org.apache.qpid.protocol.AMQConstant;
public class QueuePurgeHandler implements StateAwareMethodListener<QueuePurgeBody>
{
private static final QueuePurgeHandler _instance = new QueuePurgeHandler();
public static QueuePurgeHandler getInstance()
{
return _instance;
}
private final boolean _failIfNotFound;
public QueuePurgeHandler()
{
this(true);
}
public QueuePurgeHandler(boolean failIfNotFound)
{
_failIfNotFound = failIfNotFound;
}
public void methodReceived(AMQStateManager stateManager, AMQMethodEvent<QueuePurgeBody> evt) throws AMQException
{
AMQProtocolSession session = stateManager.getProtocolSession();
VirtualHost virtualHost = session.getVirtualHost();
QueueRegistry queueRegistry = virtualHost.getQueueRegistry();
QueuePurgeBody body = evt.getMethod();
AMQQueue queue;
if(body.queue == null)
{
queue = session.getChannel(evt.getChannelId()).getDefaultQueue();
if(queue == null)
{
if(_failIfNotFound)
{
throw body.getConnectionException(AMQConstant.NOT_ALLOWED.getCode(),"No queue specified.");
}
}
}
else
{
queue = queueRegistry.getQueue(body.queue);
}
if(queue == null)
{
if(_failIfNotFound)
{
throw body.getChannelException(404, "Queue " + body.queue + " does not exist.");
}
}
else
{
long purged = queue.clearQueue(session.getChannel(evt.getChannelId()).getStoreContext());
if(!body.nowait)
{
// AMQP version change: Hardwire the version to 0-8 (major=8, minor=0)
// TODO: Connect this to the session version obtained from ProtocolInitiation for this session.
// Be aware of possible changes to parameter order as versions change.
session.writeFrame(QueuePurgeOkBody.createAMQFrame(evt.getChannelId(),
(byte)8, (byte)0, // AMQP version (major, minor)
purged)); // messageCount
}
}
}
}
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