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Diffstat (limited to 'qpid/cpp/src/qpid/broker/QueueEvents.h')
-rw-r--r-- | qpid/cpp/src/qpid/broker/QueueEvents.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/QueueEvents.h b/qpid/cpp/src/qpid/broker/QueueEvents.h new file mode 100644 index 0000000000..fcddfe9092 --- /dev/null +++ b/qpid/cpp/src/qpid/broker/QueueEvents.h @@ -0,0 +1,85 @@ +#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*/ |