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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 _MessageStore_
#define _MessageStore_
#include "qpid/broker/Message.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/TransactionalStore.h"
namespace qpid {
namespace broker {
/**
* An abstraction of the persistent storage for messages.
*/
class MessageStore : public TransactionalStore{
public:
/**
* Enqueues a message, storing the message if it has not
* been previously stored and recording that the given
* message is on the given queue.
*
* @param msg the message to enqueue
* @param queue the name of the queue onto which it is to be enqueued
* @param xid (a pointer to) an identifier of the
* distributed transaction in which the operation takes
* place or null for 'local' transactions
*/
virtual void enqueue(Message::shared_ptr& msg, const string& queue, const string * const xid) = 0;
/**
* Dequeues a message, recording that the given message is
* no longer on the given queue and deleting the message
* if it is no longer on any other queue.
*
* @param msg the message to dequeue
* @param queue the name of th queue from which it is to be dequeued
* @param xid (a pointer to) an identifier of the
* distributed transaction in which the operation takes
* place or null for 'local' transactions
*/
virtual void dequeue(Message::shared_ptr& msg, const string& queue, const string * const xid) = 0;
/**
* Treat all enqueue/dequeues where this xid was specified as being committed.
*/
virtual void committed(const string * const xid) = 0;
/**
* Treat all enqueue/dequeues where this xid was specified as being aborted.
*/
virtual void aborted(const string * const xid) = 0;
virtual ~MessageStore(){}
};
}
}
#endif
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