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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 "SessionHandler.h"
#include "Session.h"
#include "Connection.h"
#include "qpid/framing/reply_exceptions.h"
#include "qpid/framing/constants.h"
#include "qpid/log/Statement.h"
namespace qpid {
namespace broker {
using namespace framing;
// FIXME aconway 2007-08-31: the SessionHandler should create its
// private proxy directly on the connections out handler.
// Session/channel methods should not go thru the other layers.
// Need to get rid of ChannelAdapter and allow proxies to be created
// directly on output handlers.
//
framing::AMQP_ClientProxy& SessionHandler::getProxy() {
return session->getProxy();
}
SessionHandler::SessionHandler(Connection& c, ChannelId ch)
: connection(c), channel(ch), ignoring(false)
{
in = this;
out = &c.getOutput();
}
SessionHandler::~SessionHandler() {}
namespace {
ClassId classId(AMQMethodBody* m) { return m ? m->amqpMethodId() : 0; }
MethodId methodId(AMQMethodBody* m) { return m ? m->amqpClassId() : 0; }
} // namespace
void SessionHandler::handle(AMQFrame& f) {
// Note on channel states: a channel is open if session != 0. A
// channel that is closed (session == 0) can be in the "ignoring"
// state. This is a temporary state after we have sent a channel
// exception, where extra frames might arrive that should be
// ignored.
//
AMQMethodBody* m=f.getMethod();
try {
if (m && m->invoke(static_cast<Invocable*>(this)))
return;
else if (session)
session->in(f);
else if (!ignoring)
throw ChannelErrorException(
QPID_MSG("Channel " << channel << " is not open"));
} catch(const ChannelException& e){
getProxy().getChannel().close(
e.code, e.toString(), classId(m), methodId(m));
session.reset();
ignoring=true; // Ignore trailing frames sent by client.
}catch(const ConnectionException& e){
connection.close(e.code, e.what(), classId(m), methodId(m));
}catch(const std::exception& e){
connection.close(
framing::INTERNAL_ERROR, e.what(), classId(m), methodId(m));
}
}
void SessionHandler::assertOpen(const char* method) {
if (!session)
throw ChannelErrorException(
QPID_MSG(""<<method<<" failed: No session for channel "
<< getChannel()));
}
void SessionHandler::assertClosed(const char* method) {
// FIXME aconway 2007-08-31: Should raise channel-busy, need
// to update spec.
if (session)
throw PreconditionFailedException(
QPID_MSG(""<<method<<" failed: "
<< channel << " already open on channel "
<< getChannel()));
}
void SessionHandler::open(const string& /*outOfBand*/){
assertClosed("open");
session.reset(new Session(*this, 0));
getProxy().getChannel().openOk();
}
// FIXME aconway 2007-08-31: flow is no longer in the spec.
void SessionHandler::flow(bool active){
session->flow(active);
getProxy().getChannel().flowOk(active);
}
void SessionHandler::flowOk(bool /*active*/){}
void SessionHandler::close(uint16_t replyCode,
const string& replyText,
uint16_t classId, uint16_t methodId)
{
// FIXME aconway 2007-08-31: Extend constants.h to map codes & ids
// to text names.
QPID_LOG(warning, "Received session.close("<<replyCode<<","
<<replyText << ","
<< "classid=" <<classId<< ","
<< "methodid=" <<methodId);
ignoring=false;
getProxy().getChannel().closeOk();
// FIXME aconway 2007-08-31: sould reset session BEFORE
// sending closeOK to avoid races. SessionHandler
// needs its own private proxy, see getProxy() above.
session.reset();
// No need to remove from connection map, will be re-used
// if channel is re-opened.
}
void SessionHandler::closeOk(){
ignoring=false;
}
void SessionHandler::ok()
{
//no specific action required, generic response handling should be
//sufficient
}
}} // namespace qpid::broker
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