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#ifndef QPID_BROKER_MESSAGEMAP_H
#define QPID_BROKER_MESSAGEMAP_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/broker/Messages.h"
#include "qpid/framing/SequenceNumber.h"
#include <map>
#include <string>
namespace qpid {
namespace broker {
/**
* Provides a last value queue behaviour, whereby a messages replace
* any previous message with the same value for a defined property
* (i.e. the key).
*/
class MessageMap : public Messages
{
public:
MessageMap(const std::string& key);
virtual ~MessageMap() {}
size_t size();
bool empty();
void reinsert(const QueuedMessage&);
virtual bool remove(const framing::SequenceNumber&, QueuedMessage&);
bool find(const framing::SequenceNumber&, QueuedMessage&);
virtual bool next(const framing::SequenceNumber&, QueuedMessage&);
QueuedMessage& front();
void pop();
bool pop(QueuedMessage&);
virtual bool push(const QueuedMessage& added, QueuedMessage& removed);
void foreach(Functor);
virtual void removeIf(Predicate);
protected:
typedef std::map<std::string, QueuedMessage> Index;
typedef std::map<framing::SequenceNumber, QueuedMessage> Ordering;
const std::string key;
Index index;
Ordering messages;
std::string getKey(const QueuedMessage&);
virtual const QueuedMessage& replace(const QueuedMessage&, const QueuedMessage&);
void erase(Ordering::iterator);
};
}} // namespace qpid::broker
#endif /*!QPID_BROKER_MESSAGEMAP_H*/
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