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#ifndef QPID_BROKER_STATEFULQUEUEOBSERVER_H
#define QPID_BROKER_STATEFULQUEUEOBSERVER_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/QueueObserver.h"
#include "qpid/framing/FieldTable.h"
namespace qpid {
namespace broker {
/**
* Specialized type of QueueObserver that maintains internal state that has to
* be replicated across clustered brokers.
*/
class StatefulQueueObserver : public QueueObserver
{
public:
StatefulQueueObserver(std::string _id) : id(_id) {}
virtual ~StatefulQueueObserver() {}
/** This identifier must uniquely identify this particular observer amoung
* all observers on a queue. For cluster replication, this id will be used
* to identify the peer queue observer for synchronization across
* brokers.
*/
const std::string& getId() const { return id; }
/** This method should return the observer's internal state as an opaque
* map.
*/
virtual void getState(qpid::framing::FieldTable& state ) const = 0;
/** The input map represents the internal state of the peer observer that
* this observer should synchonize to.
*/
virtual void setState(const qpid::framing::FieldTable&) = 0;
private:
std::string id;
};
}} // namespace qpid::broker
#endif /*!QPID_BROKER_STATEFULQUEUEOBSERVER_H*/
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