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#ifndef QPID_BROKER_LEGACYLVQ_H
#define QPID_BROKER_LEGACYLVQ_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/MessageMap.h"
#include <memory>
namespace qpid {
namespace broker {
class Broker;
/**
* This class encapsulates the behaviour of the old style LVQ where a
* message replacing another messages for the given key will use the
* position in the queue of the previous message. This however causes
* problems for browsing. Either browsers stop the coalescing of
* messages by key (default) or they may mis updates (if the no-browse
* option is specified).
*/
class LegacyLVQ : public MessageMap
{
public:
LegacyLVQ(const std::string& key, bool noBrowse = false, Broker* broker = 0);
bool remove(const framing::SequenceNumber&, QueuedMessage&);
bool next(const framing::SequenceNumber&, QueuedMessage&);
bool push(const QueuedMessage& added, QueuedMessage& removed);
void removeIf(Predicate);
void setNoBrowse(bool);
static std::auto_ptr<Messages> updateOrReplace(std::auto_ptr<Messages> current,
const std::string& key, bool noBrowse,
Broker* broker);
protected:
bool noBrowse;
Broker* broker;
const QueuedMessage& replace(const QueuedMessage&, const QueuedMessage&);
};
}} // namespace qpid::broker
#endif /*!QPID_BROKER_LEGACYLVQ_H*/
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