diff options
Diffstat (limited to 'qpid/cpp/src/qpid/broker/QueueEvents.cpp')
-rw-r--r-- | qpid/cpp/src/qpid/broker/QueueEvents.cpp | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/QueueEvents.cpp b/qpid/cpp/src/qpid/broker/QueueEvents.cpp new file mode 100644 index 0000000000..2c540ff1ad --- /dev/null +++ b/qpid/cpp/src/qpid/broker/QueueEvents.cpp @@ -0,0 +1,147 @@ +/* + * + * 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); + } + 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 |