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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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 "SessionManager.h"
#include "ClassifierHandler.h"
#include "qpid/log/Statement.h"
#include "qpid/framing/amqp_types.h"
#include "qpid/framing/AMQFrame.h"
#include "qpid/framing/AMQP_ServerOperations.h"
#include "qpid/broker/BrokerAdapter.h"
#include "qpid/broker/Connection.h"
#include "qpid/framing/ChannelAdapter.h"
#include <boost/utility/in_place_factory.hpp>
namespace qpid {
namespace cluster {
using namespace framing;
using namespace sys;
using namespace broker;
/** Handler to send frames direct to local broker (bypass correlation etc.) */
struct SessionManager::BrokerHandler : public FrameHandler, private ChannelAdapter
{
Connection connection;
SessionHandler sessionAdapter;
broker::Session session;
BrokerAdapter adapter;
// TODO aconway 2007-07-23: Lots of needless flab here (Channel,
// Connection, ChannelAdapter) As these classes are untangled the
// flab can be reduced. The real requirements are:
// - Dispatch methods direct to broker bypassing all the correlation muck
// - Efficiently suppress responses
// For the latter we are now using a ChannelAdapter with noop send()
// A more efficient solution would be a no-op proxy.
//
BrokerHandler(Broker& broker) :
connection(0, broker),
sessionAdapter(connection, 0),
session(sessionAdapter, 1),
adapter(session, static_cast<ChannelAdapter&>(*this)) {}
void handle(AMQFrame& frame) {
AMQMethodBody* body=dynamic_cast<AMQMethodBody*>(frame.getBody());
assert(body);
body->invoke(adapter);
}
// Dummy methods.
virtual void handleHeader(AMQHeaderBody*){}
virtual void handleContent(AMQContentBody*){}
virtual void handleHeartbeat(AMQHeartbeatBody*){}
virtual bool isOpen() const{ return true; }
virtual void handleMethod(AMQMethodBody*){}
// No-op send.
virtual void send(const AMQBody&) {}
//delivery adapter methods, also no-ops:
virtual DeliveryId deliver(Message::shared_ptr&, DeliveryToken::shared_ptr) { return 0; }
virtual void redeliver(Message::shared_ptr&, DeliveryToken::shared_ptr, DeliveryId) {}
};
SessionManager::~SessionManager(){}
SessionManager::SessionManager(Broker& b, FrameHandler& c)
: cluster(c), localBroker(new BrokerHandler(b)) {}
void SessionManager::update(ChannelId channel, FrameHandler::Chains& chains) {
Mutex::ScopedLock l(lock);
// Create a new local session, store local chains.
assert(!sessions[channel]);
boost::optional<Session>& session=sessions[channel];
session = boost::in_place(boost::ref(cluster), boost::ref(chains.in));
chains.in = &session->classifier;
}
void SessionManager::handle(AMQFrame& frame) {
// Incoming from cluster.
{
Mutex::ScopedLock l(lock);
SessionMap::iterator i=sessions.find(frame.getChannel());
if (i == sessions.end()) {
// Non-local wiring method frame, invoke locally.
(*localBroker)(frame);
}
else {
// Local frame continuing on local chain
assert(i->second);
i->second->cont(frame);
}
}
}
}} // namespace qpid::cluster
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