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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 "PreviewSessionHandler.h"
#include "PreviewSessionState.h"
#include "PreviewConnection.h"
#include "qpid/framing/reply_exceptions.h"
#include "qpid/framing/constants.h"
#include "qpid/framing/ClientInvoker.h"
#include "qpid/framing/ServerInvoker.h"
#include "qpid/log/Statement.h"
#include <boost/bind.hpp>
namespace qpid {
namespace broker {
using namespace framing;
using namespace std;
using namespace qpid::sys;
PreviewSessionHandler::PreviewSessionHandler(PreviewConnection& 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) {}
PreviewSessionHandler::~PreviewSessionHandler() {}
namespace {
ClassId classId(AMQMethodBody* m) { return m ? m->amqpMethodId() : 0; }
MethodId methodId(AMQMethodBody* m) { return m ? m->amqpClassId() : 0; }
} // namespace
void PreviewSessionHandler::handleIn(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.getBody()->getMethod();
try {
if (m && invoke(static_cast<AMQP_ServerOperations::SessionHandler&>(*this), *m)) {
return;
} else if (session.get()) {
boost::optional<SequenceNumber> ack=session->received(f);
session->in.handle(f);
if (ack)
peerSession.ack(*ack, SequenceNumberSet());
} else if (m && invoke(static_cast<AMQP_ClientOperations::SessionHandler&>(*this), *m)) {
return;
} else if (!ignoring) {
throw ChannelErrorException(
QPID_MSG("Channel " << channel.get() << " is not open"));
}
} catch(const ChannelException& e) {
ignoring=true; // Ignore trailing frames sent by client.
session->detach();
session.reset();
peerSession.closed(e.code, e.what());
}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 PreviewSessionHandler::handleOut(AMQFrame& f) {
channel.handle(f); // Send it.
if (session->sent(f))
peerSession.solicitAck();
}
void PreviewSessionHandler::assertAttached(const char* method) const {
if (!session.get())
throw ChannelErrorException(
QPID_MSG(method << " failed: No session for channel "
<< getChannel()));
}
void PreviewSessionHandler::assertClosed(const char* method) const {
if (session.get())
throw ChannelBusyException(
QPID_MSG(method << " failed: channel " << channel.get()
<< " is already open."));
}
void PreviewSessionHandler::open(uint32_t detachedLifetime) {
assertClosed("open");
std::auto_ptr<PreviewSessionState> state(
connection.broker.getPreviewSessionManager().open(*this, detachedLifetime));
session.reset(state.release());
peerSession.attached(session->getId(), session->getTimeout());
}
void PreviewSessionHandler::resume(const Uuid& id) {
assertClosed("resume");
session = connection.broker.getPreviewSessionManager().resume(id);
session->attach(*this);
SequenceNumber seq = session->resuming();
peerSession.attached(session->getId(), session->getTimeout());
proxy.getSession().ack(seq, SequenceNumberSet());
}
void PreviewSessionHandler::flow(bool /*active*/) {
assertAttached("flow");
// TODO aconway 2007-09-19: Removed in 0-10, remove
assert(0); throw NotImplementedException("session.flow");
}
void PreviewSessionHandler::flowOk(bool /*active*/) {
assertAttached("flowOk");
// TODO aconway 2007-09-19: Removed in 0-10, remove
assert(0); throw NotImplementedException("session.flowOk");
}
void PreviewSessionHandler::close() {
assertAttached("close");
QPID_LOG(info, "Received session.close");
ignoring=false;
session->detach();
session.reset();
peerSession.closed(REPLY_SUCCESS, "ok");
assert(&connection.getChannel(channel.get()) == this);
connection.closeChannel(channel.get());
}
void PreviewSessionHandler::closed(uint16_t replyCode, const string& replyText) {
QPID_LOG(warning, "Received session.closed: "<<replyCode<<" "<<replyText);
ignoring=false;
session->detach();
session.reset();
}
void PreviewSessionHandler::localSuspend() {
if (session.get() && session->isAttached()) {
session->detach();
connection.broker.getPreviewSessionManager().suspend(session);
session.reset();
}
}
void PreviewSessionHandler::suspend() {
assertAttached("suspend");
localSuspend();
peerSession.detached();
assert(&connection.getChannel(channel.get()) == this);
connection.closeChannel(channel.get());
}
void PreviewSessionHandler::ack(uint32_t cumulativeSeenMark,
const SequenceNumberSet& /*seenFrameSet*/)
{
assertAttached("ack");
if (session->getState() == PreviewSessionState::RESUMING) {
session->receivedAck(cumulativeSeenMark);
framing::SessionState::Replay replay=session->replay();
std::for_each(replay.begin(), replay.end(),
boost::bind(&PreviewSessionHandler::handleOut, this, _1));
}
else
session->receivedAck(cumulativeSeenMark);
}
void PreviewSessionHandler::highWaterMark(uint32_t /*lastSentMark*/) {
// TODO aconway 2007-10-02: may be removed from spec.
assert(0); throw NotImplementedException("session.high-water-mark");
}
void PreviewSessionHandler::solicitAck() {
assertAttached("solicit-ack");
peerSession.ack(session->sendingAck(), SequenceNumberSet());
}
void PreviewSessionHandler::attached(const Uuid& /*sessionId*/, uint32_t detachedLifetime)
{
std::auto_ptr<PreviewSessionState> state(
connection.broker.getPreviewSessionManager().open(*this, detachedLifetime));
session.reset(state.release());
}
void PreviewSessionHandler::detached()
{
connection.broker.getPreviewSessionManager().suspend(session);
session.reset();
}
ConnectionState& PreviewSessionHandler::getConnection() { return connection; }
const ConnectionState& PreviewSessionHandler::getConnection() const { return connection; }
}} // namespace qpid::broker
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