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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 "SessionState.h"
#include "Broker.h"
#include "ConnectionState.h"
#include "MessageDelivery.h"
#include "SemanticHandler.h"
#include "SessionManager.h"
#include "SessionHandler.h"
#include "qpid/framing/reply_exceptions.h"
#include "qpid/framing/ServerInvoker.h"
#include <boost/bind.hpp>
namespace qpid {
namespace broker {
using namespace framing;
using sys::Mutex;
using boost::intrusive_ptr;
using qpid::management::ManagementAgent;
using qpid::management::ManagementObject;
using qpid::management::Manageable;
using qpid::management::Args;
SessionState::SessionState(
SessionManager* f, SessionHandler* h, uint32_t timeout_, uint32_t ack)
: framing::SessionState(ack, timeout_ > 0), nextOut(0),
factory(f), handler(h), id(true), timeout(timeout_),
broker(h->getConnection().broker),
version(h->getConnection().getVersion()),
semanticState(*this, *this),
adapter(semanticState),
msgBuilder(&broker.getStore(), broker.getStagingThreshold()),
ackOp(boost::bind(&SemanticState::completed, &semanticState, _1, _2)),
enqueuedOp(boost::bind(&SessionState::enqueued, this, _1))
{
getConnection().outputTasks.addOutputTask(&semanticState);
Manageable* parent = broker.GetVhostObject ();
if (parent != 0)
{
ManagementAgent::shared_ptr agent = ManagementAgent::getAgent ();
if (agent.get () != 0)
{
mgmtObject = management::Session::shared_ptr
(new management::Session (this, parent, id.str ()));
mgmtObject->set_attached (1);
mgmtObject->set_clientRef (h->getConnection().GetManagementObject()->getObjectId());
mgmtObject->set_channelId (h->getChannel());
mgmtObject->set_detachedLifespan (getTimeout());
agent->addObject (mgmtObject);
}
}
}
SessionState::~SessionState() {
// Remove ID from active session list.
if (factory)
factory->erase(getId());
if (mgmtObject.get () != 0)
mgmtObject->resourceDestroy ();
}
SessionHandler* SessionState::getHandler() {
return handler;
}
AMQP_ClientProxy& SessionState::getProxy() {
assert(isAttached());
return getHandler()->getProxy();
}
ConnectionState& SessionState::getConnection() {
assert(isAttached());
return getHandler()->getConnection();
}
bool SessionState::isLocal(const ConnectionToken* t) const
{
return isAttached() && &(handler->getConnection()) == t;
}
void SessionState::detach() {
getConnection().outputTasks.removeOutputTask(&semanticState);
Mutex::ScopedLock l(lock);
handler = 0;
if (mgmtObject.get() != 0)
{
mgmtObject->set_attached (0);
}
}
void SessionState::attach(SessionHandler& h) {
{
Mutex::ScopedLock l(lock);
handler = &h;
if (mgmtObject.get() != 0)
{
mgmtObject->set_attached (1);
mgmtObject->set_clientRef (h.getConnection().GetManagementObject()->getObjectId());
mgmtObject->set_channelId (h.getChannel());
}
}
h.getConnection().outputTasks.addOutputTask(&semanticState);
}
void SessionState::activateOutput()
{
Mutex::ScopedLock l(lock);
if (isAttached()) {
getConnection().outputTasks.activateOutput();
}
}
//This class could be used as the callback for queue notifications
//if not attached, it can simply ignore the callback, else pass it
//on to the connection
ManagementObject::shared_ptr SessionState::GetManagementObject (void) const
{
return dynamic_pointer_cast<ManagementObject> (mgmtObject);
}
Manageable::status_t SessionState::ManagementMethod (uint32_t methodId,
Args& /*args*/)
{
Manageable::status_t status = Manageable::STATUS_UNKNOWN_METHOD;
switch (methodId)
{
case management::Session::METHOD_DETACH :
if (handler != 0)
{
handler->detach();
}
status = Manageable::STATUS_OK;
break;
case management::Session::METHOD_CLOSE :
/*
if (handler != 0)
{
handler->getConnection().closeChannel(handler->getChannel());
}
status = Manageable::STATUS_OK;
break;
*/
case management::Session::METHOD_SOLICITACK :
case management::Session::METHOD_RESETLIFESPAN :
status = Manageable::STATUS_NOT_IMPLEMENTED;
break;
}
return status;
}
void SessionState::handleCommand(framing::AMQMethodBody* method, SequenceNumber& id)
{
id = nextIn++;
Invoker::Result invocation = invoke(adapter, *method);
completed.add(id);
if (!invocation.wasHandled()) {
throw NotImplementedException("Not implemented");
} else if (invocation.hasResult()) {
nextOut++;//execution result is now a command, so the counter must be incremented
getProxy().getExecution010().result(id, invocation.getResult());
}
if (method->isSync()) {
incomplete.process(enqueuedOp, true);
sendCompletion();
}
//TODO: if window gets too large send unsolicited completion
}
void SessionState::handleContent(AMQFrame& frame, SequenceNumber& id)
{
intrusive_ptr<Message> msg(msgBuilder.getMessage());
if (frame.getBof() && frame.getBos()) {//start of frameset
id = nextIn++;
msgBuilder.start(id);
msg = msgBuilder.getMessage();
} else {
id = msg->getCommandId();
}
msgBuilder.handle(frame);
if (frame.getEof() && frame.getEos()) {//end of frameset
msg->setPublisher(&getConnection());
semanticState.handle(msg);
msgBuilder.end();
if (msg->isEnqueueComplete()) {
enqueued(msg);
} else {
incomplete.add(msg);
}
//hold up execution until async enqueue is complete
if (msg->getFrames().getMethod()->isSync()) {
incomplete.process(enqueuedOp, true);
sendCompletion();
} else {
incomplete.process(enqueuedOp, false);
}
}
}
void SessionState::enqueued(boost::intrusive_ptr<Message> msg)
{
completed.add(msg->getCommandId());
if (msg->requiresAccept()) {
nextOut++;//accept is a command, so the counter must be incremented
getProxy().getMessage010().accept(SequenceSet(msg->getCommandId()));
}
}
void SessionState::handle(AMQFrame& frame)
{
received(frame);
SequenceNumber commandId;
try {
//TODO: make command handling more uniform, regardless of whether
//commands carry content. (For now, assume all single frame
//assemblies are non-content bearing and all content-bearing
//assemblies will have more than one frame):
if (frame.getBof() && frame.getEof()) {
handleCommand(frame.getMethod(), commandId);
} else {
handleContent(frame, commandId);
}
} catch(const SessionException& e) {
//TODO: better implementation of new exception handling mechanism
//0-10 final changes the types of exceptions, 'model layer'
//exceptions will all be session exceptions regardless of
//current channel/connection classification
AMQMethodBody* m = frame.getMethod();
if (m) {
getProxy().getExecution010().exception(e.code, commandId, m->amqpClassId(), m->amqpMethodId(), 0, e.what(), FieldTable());
} else {
getProxy().getExecution010().exception(e.code, commandId, 0, 0, 0, e.what(), FieldTable());
}
handler->destroy();
}
}
DeliveryId SessionState::deliver(QueuedMessage& msg, DeliveryToken::shared_ptr token)
{
uint32_t maxFrameSize = getConnection().getFrameMax();
MessageDelivery::deliver(msg, getProxy().getHandler(), nextOut, token, maxFrameSize);
return nextOut++;
}
void SessionState::sendCompletion()
{
handler->sendCompletion();
}
void SessionState::complete(const SequenceSet& commands)
{
knownCompleted.add(commands);
commands.for_each(ackOp);
}
}} // namespace qpid::broker
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