| /* |
| * |
| * 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/QueueEvents.h" |
| #include "qpid/broker/Queue.h" |
| #include "qpid/broker/QueueObserver.h" |
| #include "qpid/Exception.h" |
| #include "qpid/log/Statement.h" |
| |
| namespace qpid { |
| namespace broker { |
| |
| QueueEvents::QueueEvents(const boost::shared_ptr<sys::Poller>& poller, bool isSync) : |
| eventQueue(boost::bind(&QueueEvents::handle, this, _1), poller), enabled(true), sync(isSync) |
| { |
| if (!sync) eventQueue.start(); |
| } |
| |
| QueueEvents::~QueueEvents() |
| { |
| if (!sync) eventQueue.stop(); |
| } |
| |
| void QueueEvents::enqueued(const QueuedMessage& m) |
| { |
| if (enabled) { |
| Event enq(ENQUEUE, m); |
| if (sync) { |
| for (Listeners::iterator j = listeners.begin(); j != listeners.end(); j++) |
| j->second(enq); |
| } else { |
| eventQueue.push(enq); |
| } |
| } |
| } |
| |
| void QueueEvents::dequeued(const QueuedMessage& m) |
| { |
| if (enabled) { |
| Event deq(DEQUEUE, m); |
| if (sync) { |
| for (Listeners::iterator j = listeners.begin(); j != listeners.end(); j++) |
| j->second(deq); |
| } else { |
| eventQueue.push(Event(DEQUEUE, m)); |
| } |
| } |
| } |
| |
| void QueueEvents::registerListener(const std::string& id, const EventListener& listener) |
| { |
| qpid::sys::Mutex::ScopedLock l(lock); |
| if (listeners.find(id) == listeners.end()) { |
| listeners[id] = listener; |
| } else { |
| throw Exception(QPID_MSG("Event listener already registered for '" << id << "'")); |
| } |
| } |
| |
| void QueueEvents::unregisterListener(const std::string& id) |
| { |
| qpid::sys::Mutex::ScopedLock l(lock); |
| if (listeners.find(id) == listeners.end()) { |
| throw Exception(QPID_MSG("No event listener registered for '" << id << "'")); |
| } else { |
| listeners.erase(id); |
| } |
| } |
| |
| QueueEvents::EventQueue::Batch::const_iterator |
| QueueEvents::handle(const EventQueue::Batch& events) { |
| qpid::sys::Mutex::ScopedLock l(lock); |
| for (EventQueue::Batch::const_iterator i = events.begin(); i != events.end(); ++i) { |
| for (Listeners::iterator j = listeners.begin(); j != listeners.end(); j++) { |
| j->second(*i); |
| } |
| } |
| return events.end(); |
| } |
| |
| void QueueEvents::shutdown() |
| { |
| if (!sync && !eventQueue.empty() && !listeners.empty()) eventQueue.shutdown(); |
| } |
| |
| void QueueEvents::enable() |
| { |
| enabled = true; |
| QPID_LOG(debug, "Queue events enabled"); |
| } |
| |
| void QueueEvents::disable() |
| { |
| enabled = false; |
| QPID_LOG(debug, "Queue events disabled"); |
| } |
| |
| bool QueueEvents::isSync() |
| { |
| return sync; |
| } |
| |
| class EventGenerator : public QueueObserver |
| { |
| public: |
| EventGenerator(QueueEvents& mgr, bool enqOnly) : manager(mgr), enqueueOnly(enqOnly) {} |
| void enqueued(const QueuedMessage& m) |
| { |
| manager.enqueued(m); |
| } |
| void dequeued(const QueuedMessage& m) |
| { |
| if (!enqueueOnly) manager.dequeued(m); |
| } |
| |
| void acquired(const QueuedMessage&) {}; |
| void requeued(const QueuedMessage&) {}; |
| |
| private: |
| QueueEvents& manager; |
| const bool enqueueOnly; |
| }; |
| |
| void QueueEvents::observe(Queue& queue, bool enqueueOnly) |
| { |
| boost::shared_ptr<QueueObserver> observer(new EventGenerator(*this, enqueueOnly)); |
| queue.addObserver(observer); |
| } |
| |
| |
| QueueEvents::Event::Event(EventType t, const QueuedMessage& m) : type(t), msg(m) {} |
| |
| |
| }} // namespace qpid::broker |