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#ifndef _broker_BrokerChannel_h
#define _broker_BrokerChannel_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 <list>
#include <boost/scoped_ptr.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/ptr_container/ptr_map.hpp>
#include <AccumulatedAck.h>
#include <Consumer.h>
#include <DeliveryRecord.h>
#include <MessageBuilder.h>
#include <NameGenerator.h>
#include <Prefetch.h>
#include <TxBuffer.h>
#include "framing/ChannelAdapter.h"
#include "ChannelOpenBody.h"
#include "CompletionHandler.h"
namespace qpid {
namespace broker {
class ConnectionToken;
class Connection;
class Queue;
class BrokerAdapter;
using framing::string;
/**
* Maintains state for an AMQP channel. Handles incoming and
* outgoing messages for that channel.
*/
class Channel : public framing::ChannelAdapter,
public CompletionHandler
{
class ConsumerImpl : public Consumer
{
Channel* parent;
const string tag;
Queue::shared_ptr queue;
ConnectionToken* const connection;
const bool ackExpected;
bool blocked;
public:
ConsumerImpl(Channel* parent, const string& tag,
Queue::shared_ptr queue,
ConnectionToken* const connection, bool ack);
~ConsumerImpl();
virtual bool deliver(Message::shared_ptr& msg);
void cancel();
void requestDispatch();
};
typedef boost::ptr_map<string,ConsumerImpl> ConsumerImplMap;
Connection& connection;
uint64_t currentDeliveryTag;
Queue::shared_ptr defaultQueue;
bool transactional;
ConsumerImplMap consumers;
uint32_t prefetchSize;
uint16_t prefetchCount;
Prefetch outstanding;
uint32_t framesize;
NameGenerator tagGenerator;
std::list<DeliveryRecord> unacked;
sys::Mutex deliveryLock;
TxBuffer txBuffer;
AccumulatedAck accumulatedAck;
MessageStore* const store;
MessageBuilder messageBuilder;//builder for in-progress message
bool opened;
boost::scoped_ptr<BrokerAdapter> adapter;
// completion handler for MessageBuilder
void complete(Message::shared_ptr msg);
void deliver(Message::shared_ptr& msg, const string& tag,
Queue::shared_ptr& queue, bool ackExpected);
bool checkPrefetch(Message::shared_ptr& msg);
public:
Channel(Connection& parent,
framing::ChannelId id,
uint32_t framesize,
MessageStore* const _store = 0,
uint64_t stagingThreshold = 0);
~Channel();
bool isOpen() const { return opened; }
BrokerAdapter& getAdatper() { return *adapter; }
void open() { opened = true; }
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(string& tagInOut, Queue::shared_ptr queue, bool acks,
bool exclusive, ConnectionToken* const connection = 0,
const framing::FieldTable* = 0);
void cancel(const string& tag);
bool get(Queue::shared_ptr queue, const std::string& destination, bool ackExpected);
void begin();
void close();
void commit();
void rollback();
void ack();
void ack(uint64_t deliveryTag, bool multiple);
void ack(uint64_t deliveryTag, uint64_t endTag);
void recover(bool requeue);
void deliver(Message::shared_ptr& msg, const string& consumerTag, uint64_t deliveryTag);
void handlePublish(Message* msg);
void handleHeader(boost::shared_ptr<framing::AMQHeaderBody>);
void handleContent(boost::shared_ptr<framing::AMQContentBody>);
void handleHeartbeat(boost::shared_ptr<framing::AMQHeartbeatBody>);
void handleInlineTransfer(Message::shared_ptr msg);
// For ChannelAdapter
void handleMethodInContext(
boost::shared_ptr<framing::AMQMethodBody> method,
const framing::MethodContext& context);
};
}} // namespace broker
#endif /*!_broker_BrokerChannel_h*/
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