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#ifndef QPID_BROKER_AMQP_RELAY_H
#define QPID_BROKER_AMQP_RELAY_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 "Incoming.h"
#include "Outgoing.h"
#include "qpid/sys/Mutex.h"
extern "C" {
#include <proton/engine.h>
}
#include <deque>
namespace qpid {
namespace broker {
namespace amqp {
struct Delivery
{
bool settled;
pn_delivery_t* handle;
Delivery();
Delivery(pn_delivery_t* d);
};
class BufferedTransfer
{
public:
BufferedTransfer();
void initIn(pn_link_t* link, pn_delivery_t* d);
bool settle();
void initOut(pn_link_t* link);
uint64_t updated();
bool write(pn_link_t*);
private:
std::vector<char> data;
Delivery in;
Delivery out;
pn_delivery_tag_t dt;
std::vector<char> tag;
uint64_t disposition;
};
/**
*
*/
class Relay
{
public:
Relay(size_t max);
void check();
size_t size() const;
BufferedTransfer& front();
void pop();
bool send(pn_link_t*);
void received(pn_link_t* link, pn_delivery_t* delivery);
int getCredit() const;
void setCredit(int);
void attached(Outgoing*);
void attached(Incoming*);
void detached(Outgoing*);
void detached(Incoming*);
private:
std::deque<BufferedTransfer> buffer;//TODO: optimise by replacing with simple circular array
int credit;//issued by outgoing peer, decremented everytime we send a message on outgoing link
size_t max;
size_t head;
size_t tail;
bool isDetached;
Outgoing* out;
Incoming* in;
mutable qpid::sys::Mutex lock;
BufferedTransfer& push();
};
class OutgoingFromRelay : public Outgoing
{
public:
OutgoingFromRelay(pn_link_t*, Broker&, Session&, const std::string& source,
const std::string& target, const std::string& name, boost::shared_ptr<Relay>);
bool doWork();
void handle(pn_delivery_t* delivery);
void detached(bool closed);
void init();
void setSubjectFilter(const std::string&);
void setSelectorFilter(const std::string&);
private:
const std::string name;
pn_link_t* link;
boost::shared_ptr<Relay> relay;
};
class IncomingToRelay : public Incoming
{
public:
IncomingToRelay(pn_link_t*, Broker&, Session&, const std::string& source,
const std::string& target, const std::string& name, boost::shared_ptr<Relay> r);
bool settle();
bool doWork();
bool haveWork();
void detached(bool closed);
void readable(pn_delivery_t* delivery);
uint32_t getCredit();
private:
boost::shared_ptr<Relay> relay;
};
}}} // namespace qpid::broker::amqp
#endif /*!QPID_BROKER_AMQP_RELAY_H*/
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