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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 _DeliveryRecord_
#define _DeliveryRecord_
#include <algorithm>
#include <list>
#include <vector>
#include <ostream>
#include "qpid/framing/SequenceSet.h"
#include "Queue.h"
#include "QueuedMessage.h"
#include "DeliveryId.h"
#include "Message.h"
namespace qpid {
namespace broker {
class SemanticState;
class DeliveryRecord;
typedef std::list<DeliveryRecord> DeliveryRecords;
typedef std::list<DeliveryRecord>::iterator ack_iterator;
struct AckRange
{
ack_iterator start;
ack_iterator end;
AckRange(ack_iterator _start, ack_iterator _end) : start(_start), end(_end) {}
};
/**
* Record of a delivery for which an ack is outstanding.
*/
class DeliveryRecord
{
QueuedMessage msg;
mutable Queue::shared_ptr queue;
const std::string tag;
DeliveryId id;
bool acquired;
bool acceptExpected;
bool cancelled;
bool completed;
bool ended;
const bool windowing;
/**
* Record required credit on construction as the pointer to the
* message may be reset once we no longer need to deliver it
* (e.g. when it is accepted), but we will still need to be able
* to reallocate credit when it is completed (which could happen
* after that).
*/
const uint32_t credit;
public:
DeliveryRecord(
const QueuedMessage& msg,
const Queue::shared_ptr& queue,
const std::string& tag,
bool acquired,
bool accepted,
bool windowing,
uint32_t credit=0 // Only used if msg is empty.
);
bool matches(DeliveryId tag) const;
bool matchOrAfter(DeliveryId tag) const;
bool after(DeliveryId tag) const;
bool coveredBy(const framing::SequenceSet* const range) const;
void dequeue(TransactionContext* ctxt = 0) const;
void requeue() const;
void release(bool setRedelivered);
void reject();
void cancel(const std::string& tag);
void redeliver(SemanticState* const);
void acquire(DeliveryIds& results);
void complete();
void accept(TransactionContext* ctxt);
void setEnded();
void committed() const;
bool isAcquired() const { return acquired; }
bool isComplete() const { return completed; }
bool isRedundant() const { return ended && (!windowing || completed); }
bool isCancelled() const { return cancelled; }
bool isAccepted() const { return !acceptExpected; }
bool isEnded() const { return ended; }
bool isWindowing() const { return windowing; }
uint32_t getCredit() const;
const std::string& getTag() const { return tag; }
void deliver(framing::FrameHandler& h, DeliveryId deliveryId, uint16_t framesize);
void setId(DeliveryId _id) { id = _id; }
static AckRange findRange(DeliveryRecords& records, DeliveryId first, DeliveryId last);
const QueuedMessage& getMessage() const { return msg; }
framing::SequenceNumber getId() const { return id; }
Queue::shared_ptr getQueue() const { return queue; }
friend bool operator<(const DeliveryRecord&, const DeliveryRecord&);
friend std::ostream& operator<<(std::ostream&, const DeliveryRecord&);
};
struct AcquireFunctor
{
DeliveryIds& results;
AcquireFunctor(DeliveryIds& _results) : results(_results) {}
void operator()(DeliveryRecord& record)
{
record.acquire(results);
}
};
}
}
#endif
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