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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 "qpid/log/Statement.h"
#include "qpid/framing/amqp_types.h"
#include "qpid/framing/AMQFrame.h"
#include "SessionManager.h"
#include "ClassifierHandler.h"
namespace qpid {
namespace cluster {
using namespace framing;
using namespace sys;
/** Wrap plain AMQFrames in SessionFrames */
struct FrameWrapperHandler : public FrameHandler {
FrameWrapperHandler(const Uuid& id, bool dir, SessionFrameHandler::Chain next_)
: uuid(id), direction(dir), next(next_) {
assert(!uuid.isNull());
}
void handle(AMQFrame& frame) {
SessionFrame sf(uuid, frame, direction);
assert(next);
next->handle(sf);
}
Uuid uuid;
bool direction;
SessionFrameHandler::Chain next;
};
SessionManager::SessionManager() {}
void SessionManager::update(FrameHandler::Chains& chains)
{
Mutex::ScopedLock l(lock);
// Create a new local session, store local chains.
Uuid uuid(true);
sessions[uuid] = chains;
// Replace local incoming chain. Build from the back.
//
// TODO aconway 2007-07-05: Currently mcast wiring, bypass
// everythign else.
assert(clusterSend);
FrameHandler::Chain wiring(new FrameWrapperHandler(uuid, SessionFrame::IN, clusterSend));
FrameHandler::Chain classify(new ClassifierHandler(wiring, chains.in));
chains.in = classify;
// FIXME aconway 2007-07-05: Need to stop bypassed frames
// from overtaking mcast frames.
//
// Leave outgoing chain unmodified.
// TODO aconway 2007-07-05: Failover will require replication of
// outgoing frames to session replicas.
}
void SessionManager::handle(SessionFrame& frame) {
// Incoming from frame.
FrameHandler::Chains chains;
{
Mutex::ScopedLock l(lock);
SessionMap::iterator i = sessions.find(frame.uuid);
if (i == sessions.end()) {
QPID_LOG(trace, "Non-local frame cluster: " << frame.frame);
chains = nonLocal;
}
else {
QPID_LOG(trace, "Local frame from cluster: " << frame.frame);
chains = i->second;
}
}
FrameHandler::Chain chain =
chain = frame.isIncoming ? chains.in : chains.out;
// TODO aconway 2007-07-11: Should this be assert(chain)
if (chain)
chain->handle(frame.frame);
// TODO aconway 2007-07-05: Here's where we should unblock frame
// dispatch for the channel.
}
}} // namespace qpid::cluster
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