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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 _Channel_
#define _Channel_
#include <algorithm>
#include <functional>
#include <list>
#include <map>
#include <AccumulatedAck.h>
#include <Binding.h>
#include <Consumer.h>
#include <DeletingTxOp.h>
#include <DeliverableMessage.h>
#include <DeliveryRecord.h>
#include <BrokerMessage.h>
#include <MessageBuilder.h>
#include <NameGenerator.h>
#include <Prefetch.h>
#include <BrokerQueue.h>
#include <MessageStore.h>
#include <TxAck.h>
#include <TxBuffer.h>
#include <TxPublish.h>
#include <sys/Monitor.h>
#include <OutputHandler.h>
#include <AMQContentBody.h>
#include <AMQHeaderBody.h>
#include <BasicPublishBody.h>
namespace qpid {
namespace broker {
using qpid::framing::string;
/**
* Maintains state for an AMQP channel. Handles incoming and
* outgoing messages for that channel.
*/
class Channel : private MessageBuilder::CompletionHandler{
class ConsumerImpl : public virtual 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);
virtual bool deliver(Message::shared_ptr& msg);
void cancel();
void requestDispatch();
};
typedef std::map<string,ConsumerImpl*>::iterator consumer_iterator;
const int id;
qpid::framing::OutputHandler* out;
u_int64_t currentDeliveryTag;
Queue::shared_ptr defaultQueue;
bool transactional;
std::map<string, ConsumerImpl*> consumers;
u_int32_t prefetchSize;
u_int16_t prefetchCount;
Prefetch outstanding;
u_int32_t framesize;
NameGenerator tagGenerator;
std::list<DeliveryRecord> unacked;
qpid::sys::Mutex deliveryLock;
TxBuffer txBuffer;
AccumulatedAck accumulatedAck;
MessageStore* const store;
MessageBuilder messageBuilder;//builder for in-progress message
Exchange::shared_ptr exchange;//exchange to which any in-progress message was published to
qpid::framing::ProtocolVersion version; // version used for this channel
bool flowActive;
virtual void complete(Message::shared_ptr& msg);
void deliver(Message::shared_ptr& msg, const string& tag, Queue::shared_ptr& queue, bool ackExpected);
void cancel(consumer_iterator consumer);
bool checkPrefetch(Message::shared_ptr& msg);
public:
Channel(qpid::framing::ProtocolVersion& _version, qpid::framing::OutputHandler* out, int id, u_int32_t framesize,
MessageStore* const _store = 0, u_int64_t stagingThreshold = 0);
~Channel();
inline void setDefaultQueue(Queue::shared_ptr queue){ defaultQueue = queue; }
inline Queue::shared_ptr getDefaultQueue(){ return defaultQueue; }
inline u_int32_t setPrefetchSize(u_int32_t size){ return prefetchSize = size; }
inline u_int16_t setPrefetchCount(u_int16_t count){ return prefetchCount = count; }
bool exists(const string& consumerTag);
void consume(string& tag, Queue::shared_ptr queue, bool acks, bool exclusive,
ConnectionToken* const connection = 0, const qpid::framing::FieldTable* = 0);
void cancel(const string& tag);
bool get(Queue::shared_ptr queue, bool ackExpected);
void begin();
void close();
void commit();
void rollback();
void ack(u_int64_t deliveryTag, bool multiple);
void recover(bool requeue);
void deliver(Message::shared_ptr& msg, const string& consumerTag, u_int64_t deliveryTag);
void handlePublish(Message* msg, Exchange::shared_ptr exchange);
void handleHeader(qpid::framing::AMQHeaderBody::shared_ptr header);
void handleContent(qpid::framing::AMQContentBody::shared_ptr content);
void flow(bool active);
};
struct InvalidAckException{};
}
}
#endif
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