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#ifndef QPID_CLUSTER_QUEUEMODEL_H
#define QPID_CLUSTER_QUEUEMODEL_H
/*
*
* 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.
*
*/
#include "qpid/RefCounted.h"
#include "qpid/cluster/types.h"
#include <boost/intrusive_ptr.hpp>
#include <boost/shared_ptr.hpp>
#include <deque>
namespace qpid {
namespace broker {
class Queue;
}
namespace cluster {
class QueueContext;
/**
* Queue state that is replicated among all cluster members.
*
* Handles queue subscription controls by starting/stopping the queue.
*
* THREAD UNSAFE: only used in cluster deliver thread, on delivery
* of queue controls and also from WiringHandler on delivery of queue
* create.
*/
class QueueReplica : public RefCounted
{
public:
QueueReplica(boost::shared_ptr<broker::Queue> , const MemberId& );
void subscribe(const MemberId&);
void unsubscribe(const MemberId&);
void resubscribe(const MemberId&);
private:
friend class PrintSubscribers;
friend std::ostream& operator<<(std::ostream&, QueueOwnership);
friend std::ostream& operator<<(std::ostream&, const QueueReplica&);
typedef std::deque<MemberId> MemberQueue;
boost::shared_ptr<broker::Queue> queue;
MemberQueue subscribers;
MemberId self;
boost::intrusive_ptr<QueueContext> context;
QueueOwnership getState() const;
bool isOwner() const;
bool isSubscriber(const MemberId&) const;
void update(QueueOwnership before);
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_QUEUEMODEL_H*/
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