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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/broker/Message.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);
size_t size();
bool empty();
bool deleted(const QueueCursor&);
void publish(const Message& added);//use update instead to get replaced message
Message* next(QueueCursor&);
Message* release(const QueueCursor& cursor);
Message* find(const QueueCursor&);
Message* find(const framing::SequenceNumber&, QueueCursor*);
void foreach(Functor);
bool update(const Message& added, Message& removed);
protected:
typedef std::map<std::string, Message> Index;
typedef std::map<framing::SequenceNumber, Message> Ordering;
const std::string key;
Index index;
Ordering messages;
int32_t version;
std::string getKey(const Message&);
virtual const Message& replace(const Message&, const Message&);
void erase(Ordering::iterator);
};
}} // namespace qpid::broker
#endif /*!QPID_BROKER_MESSAGEMAP_H*/
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