| #ifndef QPID_BROKER_QUEUEEVENTS_H |
| #define QPID_BROKER_QUEUEEVENTS_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/BrokerImportExport.h" |
| #include "qpid/broker/QueuedMessage.h" |
| #include "qpid/sys/Mutex.h" |
| #include "qpid/sys/PollableQueue.h" |
| #include <map> |
| #include <string> |
| #include <boost/function.hpp> |
| |
| namespace qpid { |
| namespace broker { |
| |
| /** |
| * Event manager for queue events. Allows queues to indicate when |
| * events have occured; allows listeners to register for notification |
| * of this. The notification happens asynchronously, in a separate |
| * thread. |
| */ |
| class QueueEvents |
| { |
| public: |
| enum EventType {ENQUEUE, DEQUEUE}; |
| |
| struct Event |
| { |
| EventType type; |
| QueuedMessage msg; |
| |
| QPID_BROKER_EXTERN Event(EventType, const QueuedMessage&); |
| }; |
| |
| typedef boost::function<void (Event)> EventListener; |
| |
| QPID_BROKER_EXTERN QueueEvents(const boost::shared_ptr<sys::Poller>& poller, bool isSync = false); |
| QPID_BROKER_EXTERN ~QueueEvents(); |
| QPID_BROKER_EXTERN void enqueued(const QueuedMessage&); |
| QPID_BROKER_EXTERN void dequeued(const QueuedMessage&); |
| QPID_BROKER_EXTERN void registerListener(const std::string& id, |
| const EventListener&); |
| QPID_BROKER_EXTERN void unregisterListener(const std::string& id); |
| void enable(); |
| void disable(); |
| void observe(Queue&, bool enqueueOnly); |
| //process all outstanding events |
| QPID_BROKER_EXTERN void shutdown(); |
| QPID_BROKER_EXTERN bool isSync(); |
| private: |
| typedef qpid::sys::PollableQueue<Event> EventQueue; |
| typedef std::map<std::string, EventListener> Listeners; |
| |
| EventQueue eventQueue; |
| Listeners listeners; |
| volatile bool enabled; |
| qpid::sys::Mutex lock;//protect listeners from concurrent access |
| bool sync; |
| |
| EventQueue::Batch::const_iterator handle(const EventQueue::Batch& e); |
| |
| }; |
| }} // namespace qpid::broker |
| |
| #endif /*!QPID_BROKER_QUEUEEVENTS_H*/ |