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#ifndef QPID_CLUSTER_POLLABLEQUEUE_H
#define QPID_CLUSTER_POLLABLEQUEUE_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/sys/PollableQueue.h"
#include <qpid/log/Statement.h>
namespace qpid {
namespace cluster {
/**
* More convenient version of PollableQueue that handles iterating
* over the batch and error handling.
*/
template <class T> class PollableQueue : public sys::PollableQueue<T> {
public:
typedef boost::function<void (const T&)> Callback;
typedef boost::function<void()> ErrorCallback;
PollableQueue(Callback f, ErrorCallback err, const std::string& msg, const boost::shared_ptr<sys::Poller>& poller)
: sys::PollableQueue<T>(boost::bind(&PollableQueue<T>::handleBatch, this, _1), poller),
callback(f), error(err), message(msg) {}
void handleBatch(typename sys::PollableQueue<T>::Queue& values) {
try {
typename sys::PollableQueue<T>::Queue::iterator i = values.begin();
while (i != values.end() && !this->isStopped()) {
callback(*i);
++i;
}
values.erase(values.begin(), i);
}
catch (const std::exception& e) {
QPID_LOG(error, message << ": " << e.what());
error();
}
}
private:
Callback callback;
ErrorCallback error;
std::string message;
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_POLLABLEQUEUE_H*/
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