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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.
*
*/
#include <iostream>
#include <assert.h>
#include "Connection.h"
// TODO aconway 2007-01-16: move to channel.
#include "Requester.h"
#include "Responder.h"
using namespace boost;
using namespace qpid::sys;
using namespace qpid::framing;
using namespace qpid::sys;
namespace qpid {
namespace broker {
Connection::Connection(SessionContext* context_, Broker& broker_) :
adapter(*this),
requester(broker.getRequester()),
responder(broker.getResponder()),
context(context_),
framemax(65536),
heartbeat(0),
broker(broker_),
settings(broker.getTimeout(), broker.getStagingThreshold())
{}
Queue::shared_ptr Connection::getQueue(const string& name, u_int16_t channel){
Queue::shared_ptr queue;
if (name.empty()) {
queue = getChannel(channel).getDefaultQueue();
if (!queue) throw ConnectionException( 530, "Queue must be specified or previously declared" );
} else {
queue = broker.getQueues().find(name);
if (queue == 0) {
throw ChannelException( 404, "Queue not found: " + name);
}
}
return queue;
}
Exchange::shared_ptr Connection::findExchange(const string& name){
return broker.getExchanges().get(name);
}
void Connection::handleMethod(
u_int16_t channel, qpid::framing::AMQBody::shared_ptr body)
{
AMQMethodBody::shared_ptr method =
shared_polymorphic_cast<AMQMethodBody, AMQBody>(body);
try{
method->invoke(adapter, channel);
}catch(ChannelException& e){
closeChannel(channel);
client->getChannel().close(
channel, e.code, e.toString(),
method->amqpClassId(), method->amqpMethodId());
}catch(ConnectionException& e){
client->getConnection().close(
0, e.code, e.toString(),
method->amqpClassId(), method->amqpMethodId());
}catch(std::exception& e){
client->getConnection().close(
0, 541/*internal error*/, e.what(),
method->amqpClassId(), method->amqpMethodId());
}
}
void Connection::received(qpid::framing::AMQFrame* frame){
u_int16_t channel = frame->getChannel();
AMQBody::shared_ptr body = frame->getBody();
switch(body->type())
{
case REQUEST_BODY:
responder.received(AMQRequestBody::getData(body));
handleMethod(channel, body);
break;
case RESPONSE_BODY:
// Must process responses before marking them received.
handleMethod(channel, body);
requester.processed(AMQResponseBody::getData(body));
break;
// TODO aconway 2007-01-15: Leftover from 0-8 support, remove.
case METHOD_BODY:
handleMethod(channel, body);
break;
case HEADER_BODY:
handleHeader(
channel, shared_polymorphic_cast<AMQHeaderBody>(body));
break;
case CONTENT_BODY:
handleContent(
channel, shared_polymorphic_cast<AMQContentBody>(body));
break;
case HEARTBEAT_BODY:
assert(channel == 0);
handleHeartbeat(
shared_polymorphic_cast<AMQHeartbeatBody>(body));
break;
}
}
/**
* An OutputHandler that does request/response procssing before
* delgating to another OutputHandler.
*/
Connection::Sender::Sender(
OutputHandler& oh, Requester& req, Responder& resp)
: out(oh), requester(req), responder(resp)
{}
void Connection::Sender::send(AMQFrame* frame) {
AMQBody::shared_ptr body = frame->getBody();
u_int16_t type = body->type();
if (type == REQUEST_BODY)
requester.sending(AMQRequestBody::getData(body));
else if (type == RESPONSE_BODY)
responder.sending(AMQResponseBody::getData(body));
out.send(frame);
}
void Connection::initiated(qpid::framing::ProtocolInitiation* header) {
if (client.get())
// TODO aconway 2007-01-16: correct code.
throw ConnectionException(0, "Connection initiated twice");
client.reset(new qpid::framing::AMQP_ClientProxy(
context, header->getMajor(), header->getMinor()));
FieldTable properties;
string mechanisms("PLAIN");
string locales("en_US");
// TODO aconway 2007-01-16: Move to adapter.
client->getConnection().start(
0, header->getMajor(), header->getMinor(), properties,
mechanisms, locales);
}
void Connection::idleOut(){}
void Connection::idleIn(){}
void Connection::closed(){
try {
while (!exclusiveQueues.empty()) {
broker.getQueues().destroy(exclusiveQueues.front()->getName());
exclusiveQueues.erase(exclusiveQueues.begin());
}
} catch(std::exception& e) {
std::cout << "Caught unhandled exception while closing session: " <<
e.what() << std::endl;
assert(0);
}
}
// TODO aconway 2007-01-16: colapse these.
void Connection::handleHeader(u_int16_t channel, AMQHeaderBody::shared_ptr body){
getChannel(channel).handleHeader(body);
}
void Connection::handleContent(u_int16_t channel, AMQContentBody::shared_ptr body){
getChannel(channel).handleContent(body);
}
void Connection::handleHeartbeat(AMQHeartbeatBody::shared_ptr /*body*/){
std::cout << "Connection::handleHeartbeat()" << std::endl;
}
void Connection::openChannel(u_int16_t channel) {
if (channel == 0)
throw ConnectionException(504, "Illegal channel 0");
if (channels.find(channel) != channels.end())
throw ConnectionException(504, "Channel already open: " + channel);
channels.insert(
channel,
new Channel(
client->getProtocolVersion(), context, channel, framemax,
broker.getQueues().getStore(), settings.stagingThreshold));
}
void Connection::closeChannel(u_int16_t channel) {
getChannel(channel).close(); // throws if channel does not exist.
channels.erase(channels.find(channel));
}
Channel& Connection::getChannel(u_int16_t channel){
ChannelMap::iterator i = channels.find(channel);
if(i == channels.end())
throw ConnectionException(504, "Unknown channel: " + channel);
return *i;
}
}}
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