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/*
*
* 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.
*
*/
#ifndef _AccumulatedAck_
#define _AccumulatedAck_
#include <algorithm>
#include <functional>
#include <list>
#include <ostream>
#include "qpid/framing/SequenceNumber.h"
#include "qpid/framing/SequenceNumberSet.h"
#include "qpid/CommonImportExport.h"
namespace qpid {
namespace framing {
struct QPID_COMMON_CLASS_EXTERN Range
{
SequenceNumber start;
SequenceNumber end;
Range(SequenceNumber s, SequenceNumber e);
bool contains(SequenceNumber i) const;
bool intersect(const Range& r) const;
bool merge(const Range& r);
bool mergeable(const SequenceNumber& r) const;
};
/**
* Keeps an accumulated record of acknowledged messages (by delivery
* tag).
*/
class QPID_COMMON_CLASS_EXTERN AccumulatedAck {
public:
/**
* Everything up to this value has been acknowledged.
*/
SequenceNumber mark;
/**
* List of individually acknowledged messages greater than the
* 'mark'.
*/
std::list<Range> ranges;
QPID_COMMON_EXTERN explicit AccumulatedAck(SequenceNumber r = SequenceNumber());
QPID_COMMON_EXTERN void update(SequenceNumber firstTag, SequenceNumber lastTag);
QPID_COMMON_EXTERN void consolidate();
QPID_COMMON_EXTERN void clear();
QPID_COMMON_EXTERN bool covers(SequenceNumber tag) const;
void collectRanges(SequenceNumberSet& set) const;
QPID_COMMON_EXTERN void update(const SequenceNumber cumulative, const SequenceNumberSet& range);
void operator()(SequenceNumber first, SequenceNumber last) { update(first, last); }
};
QPID_COMMON_EXTERN std::ostream& operator<<(std::ostream&, const Range&);
QPID_COMMON_EXTERN std::ostream& operator<<(std::ostream&, const AccumulatedAck&);
}
}
#endif
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