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#ifndef QPID_HA_ALTERNATEEXCHANGESETTER_H
#define QPID_HA_ALTERNATEEXCHANGESETTER_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/log/Statement.h"
#include "qpid/broker/Exchange.h"
#include "qpid/broker/ExchangeRegistry.h"
#include "boost/function.hpp"
#include <map>
namespace qpid {
namespace ha {
/**
* Sets the alternate exchange on queues and exchanges.
* Holds onto queues/exchanges if necessary till the alternate exchange is available.
* THREAD UNSAFE
*/
class AlternateExchangeSetter
{
public:
typedef boost::function<void(boost::shared_ptr<broker::Exchange>)> SetFunction;
AlternateExchangeSetter(broker::ExchangeRegistry& er) : exchanges(er) {}
void setAlternate(const std::string& altEx, const SetFunction& setter) {
broker::Exchange::shared_ptr ex = exchanges.find(altEx);
if (ex) setter(ex); // Set immediately.
else setters.insert(Setters::value_type(altEx, setter)); // Save for later.
}
void addExchange(boost::shared_ptr<broker::Exchange> exchange) {
// Update the setters for this exchange
std::pair<Setters::iterator, Setters::iterator> range = setters.equal_range(exchange->getName());
for (Setters::iterator i = range.first; i != range.second; ++i)
i->second(exchange);
setters.erase(range.first, range.second);
}
void clear() {
if (!setters.empty())
QPID_LOG(warning, "Some alternate exchanges were not resolved.");
setters.clear();
}
private:
typedef std::multimap<std::string, SetFunction> Setters;
broker::ExchangeRegistry& exchanges;
Setters setters;
};
}} // namespace qpid::ha
#endif /*!QPID_HA_ALTERNATEEXCHANGESETTER_H*/
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