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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.
*
*/
#ifndef _QueueRegistry_
#define _QueueRegistry_
#include <map>
#include "qpid/sys/Monitor.h"
#include "qpid/broker/Queue.h"
namespace qpid {
namespace broker {
class SessionHandlerImpl;
/**
* 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::Monitor lock;
int counter;
MessageStore* const store;
};
}
}
#endif
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