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#ifndef QPID_HA_IDSETOBSERVER_H
#define QPID_HA_IDSETOBSERVER_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/broker/Message.h"
#include "qpid/broker/QueueObserver.h"
#include "qpid/sys/Mutex.h"
namespace qpid {
namespace ha {
/**
* A QueueObserver that maintains a ReplicationIdSet of the ReplicationIds of
* the messages on the queue.
*
* THREAD SAFE: Note that QueueObserver methods are called under the Queues messageLock.
*
*/
class QueueSnapshot : public broker::QueueObserver
{
public:
void enqueued(const broker::Message& m) {
sys::Mutex::ScopedLock l(lock);
set += m.getReplicationId();
}
void dequeued(const broker::Message& m) {
sys::Mutex::ScopedLock l(lock);
set -= m.getReplicationId();
}
void acquired(const broker::Message&) {}
void requeued(const broker::Message&) {}
ReplicationIdSet getSnapshot() {
sys::Mutex::ScopedLock l(lock);
return set;
}
private:
sys::Mutex lock;
ReplicationIdSet set;
};
}} // namespace qpid::ha
#endif /*!QPID_HA_IDSETOBSERVER_H*/
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