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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 "SessionState.h"
#include "Connection.h"
#include "ConnectionState.h"
#include "qpid/framing/reply_exceptions.h"
#include "qpid/framing/constants.h"
#include "qpid/framing/ClientInvoker.h"
#include "qpid/framing/ServerInvoker.h"
#include "qpid/framing/all_method_bodies.h"
#include "qpid/log/Statement.h"
#include <boost/bind.hpp>
namespace qpid {
namespace broker {
using namespace framing;
using namespace std;
using namespace qpid::sys;
SessionHandler::SessionHandler(Connection& c, ChannelId ch)
: InOutHandler(0, &out),
connection(c), channel(ch, &c.getOutput()),
proxy(out), // Via my own handleOut() for L2 data.
peerSession(channel), // Direct to channel for L2 commands.
ignoring(false)
{}
SessionHandler::~SessionHandler() {}
namespace {
ClassId classId(AMQMethodBody* m) { return m ? m->amqpMethodId() : 0; }
MethodId methodId(AMQMethodBody* m) { return m ? m->amqpClassId() : 0; }
} // namespace
void SessionHandler::handleIn(AMQFrame& f) {
// Note on channel states: a channel is attached if session != 0
AMQMethodBody* m = f.getBody()->getMethod();
try {
if (ignoring && !(m && m->isA<SessionDetachedBody>())) {
return;
}
if (m && isValid(m) && invoke(static_cast<AMQP_ServerOperations::SessionHandler&>(*this), *m)) {
//frame was a valid session control and has been handled
return;
} else if (session.get()) {
//we are attached and frame was not a session control so it is for upper layers
session->handle(f);
} else if (m && m->isA<SessionDetachedBody>()) {
handleDetach();
connection.closeChannel(channel.get());
} else {
throw NotAttachedException(QPID_MSG("Channel " << channel.get() << " is not attached"));
}
}catch(const ChannelException& e){
QPID_LOG(error, "Session detached due to: " << e.what());
peerSession.detached(name, e.code);
handleDetach();
connection.closeChannel(channel.get());
}catch(const ConnectionException& e){
connection.close(e.code, e.what(), classId(m), methodId(m));
}catch(const std::exception& e){
connection.close(501, e.what(), classId(m), methodId(m));
}
}
bool SessionHandler::isValid(AMQMethodBody* m) {
return session.get() || m->isA<SessionAttachBody>() || m->isA<SessionAttachedBody>();
}
void SessionHandler::handleOut(AMQFrame& f) {
channel.handle(f); // Send it.
if (session->sent(f))
peerSession.flush(false, false, true);
}
void SessionHandler::assertAttached(const char* method) const {
if (!session.get()) {
std::cout << "SessionHandler::assertAttached() failed for " << method << std::endl;
throw NotAttachedException(
QPID_MSG(method << " failed: No session for channel "
<< getChannel()));
}
}
void SessionHandler::assertClosed(const char* method) const {
if (session.get())
throw SessionBusyException(
QPID_MSG(method << " failed: channel " << channel.get()
<< " is already open."));
}
ConnectionState& SessionHandler::getConnection() { return connection; }
const ConnectionState& SessionHandler::getConnection() const { return connection; }
//new methods:
void SessionHandler::attach(const std::string& _name, bool /*force*/)
{
name = _name;//TODO: this should be used in conjunction with
//userid for connection as sessions identity
//TODO: need to revise session manager to support resume as well
assertClosed("attach");
session.reset(new SessionState(0, this, 0, 0, name));
peerSession.attached(name);
peerSession.commandPoint(session->nextOut, 0);
}
void SessionHandler::attached(const std::string& _name)
{
name = _name;//TODO: this should be used in conjunction with
//userid for connection as sessions identity
session.reset(new SessionState(0, this, 0, 0, name));
peerSession.commandPoint(session->nextOut, 0);
}
void SessionHandler::detach(const std::string& name)
{
assertAttached("detach");
peerSession.detached(name, session::NORMAL);
handleDetach();
assert(&connection.getChannel(channel.get()) == this);
connection.closeChannel(channel.get());
}
void SessionHandler::detached(const std::string& name, uint8_t code)
{
ignoring = false;
handleDetach();
if (code) {
//no error
} else {
//error occured
QPID_LOG(warning, "Received session.closed: "<< name << " " << code);
}
connection.closeChannel(channel.get());
}
void SessionHandler::handleDetach()
{
if (session.get()) {
session->detach();
session.reset();
}
}
void SessionHandler::requestDetach()
{
//TODO: request timeout when python can handle it
//peerSession.requestTimeout(0);
ignoring = true;
peerSession.detach(name);
}
void SessionHandler::requestTimeout(uint32_t t)
{
session->setTimeout(t);
peerSession.timeout(t);
}
void SessionHandler::timeout(uint32_t t)
{
session->setTimeout(t);
}
void SessionHandler::commandPoint(const framing::SequenceNumber& id, uint64_t offset)
{
if (offset) throw NotImplementedException("Non-zero byte offset not yet supported for command-point");
session->nextIn = id;
}
void SessionHandler::expected(const framing::SequenceSet& commands, const framing::Array& fragments)
{
if (!commands.empty() || fragments.size()) {
throw NotImplementedException("Session resumption not yet supported");
}
}
void SessionHandler::confirmed(const framing::SequenceSet& /*commands*/, const framing::Array& /*fragments*/)
{
//don't really care too much about this yet
}
void SessionHandler::completed(const framing::SequenceSet& commands, bool timelyReply)
{
session->complete(commands);
if (timelyReply) {
peerSession.knownCompleted(session->knownCompleted);
session->knownCompleted.clear();
}
}
void SessionHandler::knownCompleted(const framing::SequenceSet& commands)
{
session->completed.remove(commands);
}
void SessionHandler::flush(bool expected, bool confirmed, bool completed)
{
if (expected) {
peerSession.expected(SequenceSet(session->nextIn), Array());
}
if (confirmed) {
peerSession.confirmed(session->completed, Array());
}
if (completed) {
peerSession.completed(session->completed, true);
}
}
void SessionHandler::sendCompletion()
{
peerSession.completed(session->completed, true);
}
void SessionHandler::gap(const framing::SequenceSet& /*commands*/)
{
throw NotImplementedException("gap not yet supported");
}
}} // namespace qpid::broker
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