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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.
*
*/
#ifndef _QueueRegistry_
#define _QueueRegistry_
#include <map>
#include <sys/Monitor.h>
#include <BrokerQueue.h>
namespace qpid {
namespace broker {
/**
* A registry of queues indexed by queue name.
*
* Queues are reference counted using shared_ptr to ensure that they
* are deleted when and only when they are no longer in use.
*
*/
class QueueRegistry{
public:
QueueRegistry(MessageStore* const store = 0);
~QueueRegistry();
/**
* Declare a queue.
*
* @return The queue and a boolean flag which is true if the queue
* was created by this declare call false if it already existed.
*/
std::pair<Queue::shared_ptr, bool> declare(const string& name, bool durable = false, u_int32_t autodelete = 0,
const ConnectionToken* const owner = 0);
/**
* Destroy the named queue.
*
* Note: if the queue is in use it is not actually destroyed until
* all shared_ptrs to it are destroyed. During that time it is
* possible that a new queue with the same name may be
* created. This should not create any problems as the new and
* old queues exist independently. The registry has
* forgotten the old queue so there can be no confusion for
* subsequent calls to find or declare with the same name.
*
*/
void destroy(const string& name);
/**
* Find the named queue. Return 0 if not found.
*/
Queue::shared_ptr find(const string& name);
/**
* Generate unique queue name.
*/
string generateName();
private:
typedef std::map<string, Queue::shared_ptr> QueueMap;
QueueMap queues;
qpid::sys::Mutex lock;
int counter;
MessageStore* const store;
};
}
}
#endif
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