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#ifndef QPID_HA_QUEUESNAPSHOTS_H
#define QPID_HA_QUEUESNAPSHOTS_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 "QueueSnapshot.h"
#include "hash.h"
#include "qpid/assert.h"
#include "qpid/broker/BrokerObserver.h"
#include "qpid/broker/Queue.h"
#include "qpid/sys/Mutex.h"
#include <boost/shared_ptr.hpp>
#include <boost/make_shared.hpp>
namespace qpid {
namespace ha {
/**
* BrokerObserver that maintains a map of the QueueSnapshot for each queue.
* THREAD SAFE.
*/
class QueueSnapshots : public broker::BrokerObserver
{
public:
boost::shared_ptr<QueueSnapshot> get(const boost::shared_ptr<broker::Queue>& q) const {
boost::shared_ptr<QueueSnapshot> qs;
q->eachObserver(
boost::bind(QueueSnapshots::saveQueueSnapshot, _1, boost::ref(qs)));
return qs;
}
// BrokerObserver overrides.
void queueCreate(const boost::shared_ptr<broker::Queue>& q) {
q->addObserver(boost::make_shared<QueueSnapshot>());
}
void queueDestroy(const boost::shared_ptr<broker::Queue>& q) {
q->removeObserver(get(q));
}
private:
static void saveQueueSnapshot(
const boost::shared_ptr<broker::QueueObserver>& observer,
boost::shared_ptr<QueueSnapshot>& out)
{
if (!out) out = boost::dynamic_pointer_cast<QueueSnapshot>(observer);
}
};
}} // namespace qpid::ha
#endif /*!QPID_HA_QUEUESNAPSHOTS_H*/
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