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#ifndef QPID_BROKER_SEMANTICSTATE_H
#define QPID_BROKER_SEMANTICSTATE_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 "Consumer.h"
#include "Deliverable.h"
#include "DeliveryAdapter.h"
#include "DeliveryRecord.h"
#include "DeliveryToken.h"
#include "DtxBuffer.h"
#include "DtxManager.h"
#include "NameGenerator.h"
#include "Prefetch.h"
#include "TxBuffer.h"
#include "qpid/framing/FrameHandler.h"
#include "qpid/framing/AccumulatedAck.h"
#include "qpid/framing/Uuid.h"
#include "qpid/shared_ptr.h"
#include <boost/ptr_container/ptr_map.hpp>
#include <list>
#include <vector>
namespace qpid {
namespace broker {
class SessionState;
/**
* SemanticState holds the L3 and L4 state of an open session, whether
* attached to a channel or suspended.
*/
class SemanticState : public framing::FrameHandler::Chains,
private boost::noncopyable
{
class ConsumerImpl : public Consumer
{
sys::Mutex lock;
SemanticState* const parent;
const DeliveryToken::shared_ptr token;
const string name;
const Queue::shared_ptr queue;
const bool ackExpected;
const bool nolocal;
const bool acquire;
bool blocked;
bool windowing;
uint32_t msgCredit;
uint32_t byteCredit;
bool checkCredit(Message::shared_ptr& msg);
public:
ConsumerImpl(SemanticState* parent, DeliveryToken::shared_ptr token,
const string& name, Queue::shared_ptr queue,
bool ack, bool nolocal, bool acquire);
~ConsumerImpl();
bool deliver(QueuedMessage& msg);
void cancel();
void requestDispatch();
void setWindowMode();
void setCreditMode();
void addByteCredit(uint32_t value);
void addMessageCredit(uint32_t value);
void flush();
void stop();
void acknowledged(const DeliveryRecord&);
};
typedef boost::ptr_map<string,ConsumerImpl> ConsumerImplMap;
SessionState& session;
DeliveryAdapter& deliveryAdapter;
Queue::shared_ptr defaultQueue;
ConsumerImplMap consumers;
uint32_t prefetchSize;
uint16_t prefetchCount;
Prefetch outstanding;
NameGenerator tagGenerator;
std::list<DeliveryRecord> unacked;
sys::Mutex deliveryLock;
TxBuffer::shared_ptr txBuffer;
DtxBuffer::shared_ptr dtxBuffer;
bool dtxSelected;
framing::AccumulatedAck accumulatedAck;
bool flowActive;
boost::shared_ptr<Exchange> cacheExchange;
void route(Message::shared_ptr msg, Deliverable& strategy);
void record(const DeliveryRecord& delivery);
bool checkPrefetch(Message::shared_ptr& msg);
void checkDtxTimeout();
ConsumerImpl& find(const std::string& destination);
void ack(DeliveryId deliveryTag, DeliveryId endTag, bool cumulative);
void acknowledged(const DeliveryRecord&);
AckRange findRange(DeliveryId first, DeliveryId last);
public:
SemanticState(DeliveryAdapter&, SessionState&);
~SemanticState();
SessionState& getSession() { return session; }
/**
* Get named queue, never returns 0.
* @return: named queue or default queue for session if name=""
* @exception: ChannelException if no queue of that name is found.
* @exception: ConnectionException if name="" and session has no default.
*/
Queue::shared_ptr getQueue(const std::string& name) const;
void setDefaultQueue(Queue::shared_ptr queue){ defaultQueue = queue; }
Queue::shared_ptr getDefaultQueue() const { return defaultQueue; }
uint32_t setPrefetchSize(uint32_t size){ return prefetchSize = size; }
uint16_t setPrefetchCount(uint16_t n){ return prefetchCount = n; }
bool exists(const string& consumerTag);
/**
*@param tagInOut - if empty it is updated with the generated token.
*/
void consume(DeliveryToken::shared_ptr token, string& tagInOut, Queue::shared_ptr queue,
bool nolocal, bool acks, bool acquire, bool exclusive, const framing::FieldTable* = 0);
void cancel(const string& tag);
void setWindowMode(const std::string& destination);
void setCreditMode(const std::string& destination);
void addByteCredit(const std::string& destination, uint32_t value);
void addMessageCredit(const std::string& destination, uint32_t value);
void flush(const std::string& destination);
void stop(const std::string& destination);
bool get(DeliveryToken::shared_ptr token, Queue::shared_ptr queue, bool ackExpected);
void startTx();
void commit(MessageStore* const store);
void rollback();
void selectDtx();
void startDtx(const std::string& xid, DtxManager& mgr, bool join);
void endDtx(const std::string& xid, bool fail);
void suspendDtx(const std::string& xid);
void resumeDtx(const std::string& xid);
void ackCumulative(DeliveryId deliveryTag);
void ackRange(DeliveryId deliveryTag, DeliveryId endTag);
void recover(bool requeue);
void flow(bool active);
DeliveryId redeliver(Message::shared_ptr& msg, DeliveryToken::shared_ptr token);
void acquire(DeliveryId first, DeliveryId last, std::vector<DeliveryId>& acquired);
void release(DeliveryId first, DeliveryId last);
void reject(DeliveryId first, DeliveryId last);
void handle(Message::shared_ptr msg);
};
}} // namespace qpid::broker
#endif /*!QPID_BROKER_SEMANTICSTATE_H*/
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