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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.handler;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.qpid.server.state.AMQStateManager;
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.protocol.AMQMethodEvent;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.framing.QueueDeleteBody;
import org.apache.qpid.framing.QueueDeleteOkBody;
import org.apache.qpid.framing.ChannelCloseBody;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.AMQException;
import org.apache.qpid.protocol.AMQConstant;
public class QueueDeleteHandler implements StateAwareMethodListener<QueueDeleteBody>
{
private static final QueueDeleteHandler _instance = new QueueDeleteHandler();
public static QueueDeleteHandler getInstance()
{
return _instance;
}
private final boolean _failIfNotFound;
private final MessageStore _store;
public QueueDeleteHandler()
{
this(true);
}
public QueueDeleteHandler(boolean failIfNotFound)
{
_failIfNotFound = failIfNotFound;
_store = ApplicationRegistry.getInstance().getMessageStore();
}
public void methodReceived(AMQStateManager stateMgr, QueueRegistry queues, ExchangeRegistry exchanges, AMQProtocolSession session, AMQMethodEvent<QueueDeleteBody> evt) throws AMQException
{
QueueDeleteBody body = evt.getMethod();
AMQQueue queue;
if(body.queue == null)
{
queue = session.getChannel(evt.getChannelId()).getDefaultQueue();
}
else
{
queue = queues.getQueue(body.queue);
}
if(queue == null)
{
if(_failIfNotFound)
{
throw body.getChannelException(404, "Queue " + body.queue + " does not exist.");
}
}
else
{
if(body.ifEmpty && !queue.isEmpty())
{
AMQShortString msg = new AMQShortString("Queue: " + body.queue + " is not empty.");
// TODO - Error code
session.writeFrame(ChannelCloseBody.createAMQFrame(evt.getChannelId(),(byte)8, (byte)0, body.getClazz(), body.getMethod(), 406, msg ));
}
else if(body.ifUnused && !queue.isUnused())
{
AMQShortString msg = new AMQShortString("Queue: " + body.queue + " is still used.");
// TODO - Error code
session.writeFrame(ChannelCloseBody.createAMQFrame(evt.getChannelId(),(byte)8, (byte)0, body.getClazz(), body.getMethod(), 406, msg ));
}
else
{
int purged = queue.delete(body.ifUnused, body.ifEmpty);
_store.removeQueue(queue.getName());
// 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(QueueDeleteOkBody.createAMQFrame(evt.getChannelId(),
(byte)8, (byte)0, // AMQP version (major, minor)
purged)); // messageCount
}
}
}
}
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