| #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*/ |