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#ifndef QPID_BROKER_QUEUEOBSERVERS_H
#define QPID_BROKER_QUEUEOBSERVERS_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 "Observers.h"
#include "QueueObserver.h"
#include "qpid/log/Statement.h"
namespace qpid {
namespace broker {
/**
* A collection of queue observers.
*/
class QueueObservers : public Observers<QueueObserver> {
public:
typedef Observers<QueueObserver> Base;
// The only public functions are inherited from Observers<QueueObserver>
using Base::each; // Avoid function hiding.
friend class Queue;
typedef const sys::Mutex::ScopedLock& Lock;
QueueObservers(const std::string& q, sys::Mutex& lock) : Base(lock), qname(q) {}
template <class T> void each(void (QueueObserver::*f)(const T&), const T& arg, const char* fname, Lock l) {
Base::each(boost::bind(&QueueObservers::wrap<T>, this, f, boost::cref(arg), fname, _1), l);
}
template <class T> void wrap(void (QueueObserver::*f)(const T&), const T& arg, const char* fname, const ObserverPtr& o) {
try { (o.get()->*f)(arg); }
catch (const std::exception& e) {
QPID_LOG(warning, "Exception on " << fname << " for queue " << qname << ": " << e.what());
}
}
// Calls are locked externally by caller.
void enqueued(const Message& m, Lock l) { each(&QueueObserver::enqueued, m, "enqueue", l); }
void dequeued(const Message& m, Lock l) { each(&QueueObserver::dequeued, m, "dequeue", l); }
void acquired(const Message& m, Lock l) { each(&QueueObserver::acquired, m, "acquire", l); }
void requeued(const Message& m, Lock l) { each(&QueueObserver::requeued, m, "requeue", l); }
void consumerAdded(const Consumer& c, Lock l) { each(&QueueObserver::consumerAdded, c, "consumer added", l); }
void consumerRemoved(const Consumer& c, Lock l) { each(&QueueObserver::consumerRemoved, c, "consumer removed", l); }
void destroy(Lock l) {
Base::each(boost::bind(&QueueObserver::destroy, _1), l);
observers.clear();
}
std::string qname;
};
}} // namespace qpid::broker
#endif /*!QPID_BROKER_QUEUEOBSERVERS_H*/
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