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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 "ConnectionImpl.h"
#include "Connector.h"
#include "ConnectionSettings.h"
#include "SessionImpl.h"
#include "FailoverListener.h"
#include "qpid/log/Statement.h"
#include "qpid/Url.h"
#include "qpid/framing/enum.h"
#include "qpid/framing/reply_exceptions.h"
#include <boost/bind.hpp>
#include <boost/format.hpp>
namespace qpid {
namespace client {
using namespace qpid::framing;
using namespace qpid::framing::connection;
using namespace qpid::sys;
using namespace qpid::framing::connection;//for connection error codes
// Get timer singleton
Timer& theTimer() {
static Mutex timerInitLock;
ScopedLock<Mutex> l(timerInitLock);
static qpid::sys::Timer t;
return t;
}
class HeartbeatTask : public TimerTask {
TimeoutHandler& timeout;
void fire() {
// If we ever get here then we have timed out
QPID_LOG(debug, "Traffic timeout");
timeout.idleIn();
}
public:
HeartbeatTask(Duration p, TimeoutHandler& t) :
TimerTask(p),
timeout(t)
{}
};
ConnectionImpl::ConnectionImpl(framing::ProtocolVersion v, const ConnectionSettings& settings)
: Bounds(settings.maxFrameSize * settings.bounds),
handler(settings, v),
version(v),
nextChannel(1)
{
QPID_LOG(debug, "ConnectionImpl created for " << version.toString());
handler.in = boost::bind(&ConnectionImpl::incoming, this, _1);
handler.out = boost::bind(&Connector::send, boost::ref(connector), _1);
handler.onClose = boost::bind(&ConnectionImpl::closed, this,
CLOSE_CODE_NORMAL, std::string());
//only set error handler once open
handler.onError = boost::bind(&ConnectionImpl::closed, this, _1, _2);
}
ConnectionImpl::~ConnectionImpl() {
// Important to close the connector first, to ensure the
// connector thread does not call on us while the destructor
// is running.
failover.reset();
if (connector) connector->close();
}
void ConnectionImpl::addSession(const boost::shared_ptr<SessionImpl>& session, uint16_t channel)
{
Mutex::ScopedLock l(lock);
session->setChannel(channel ? channel : nextChannel++);
boost::weak_ptr<SessionImpl>& s = sessions[session->getChannel()];
boost::shared_ptr<SessionImpl> ss = s.lock();
if (ss) throw SessionBusyException(QPID_MSG("Channel " << ss->getChannel() << " attached to " << ss->getId()));
s = session;
}
void ConnectionImpl::handle(framing::AMQFrame& frame)
{
handler.outgoing(frame);
}
void ConnectionImpl::incoming(framing::AMQFrame& frame)
{
boost::shared_ptr<SessionImpl> s;
{
Mutex::ScopedLock l(lock);
s = sessions[frame.getChannel()].lock();
}
if (!s)
throw NotAttachedException(QPID_MSG("Invalid channel: " << frame.getChannel()));
s->in(frame);
}
bool ConnectionImpl::isOpen() const
{
return handler.isOpen();
}
void ConnectionImpl::open()
{
const std::string& protocol = handler.protocol;
const std::string& host = handler.host;
int port = handler.port;
QPID_LOG(info, "Connecting to " << protocol << ":" << host << ":" << port);
connector.reset(Connector::create(protocol, version, handler, this));
connector->setInputHandler(&handler);
connector->setShutdownHandler(this);
connector->connect(host, port);
connector->init();
handler.waitForOpen();
// Enable heartbeat if requested
uint16_t heartbeat = static_cast<ConnectionSettings&>(handler).heartbeat;
if (heartbeat) {
// Set connection timeout to be 2x heart beat interval and setup timer
heartbeatTask = new HeartbeatTask(heartbeat * 2 * TIME_SEC, *this);
handler.setRcvTimeoutTask(heartbeatTask);
theTimer().add(heartbeatTask);
}
//enable security layer if one has been negotiated:
std::auto_ptr<SecurityLayer> securityLayer = handler.getSecurityLayer();
if (securityLayer.get()) {
QPID_LOG(debug, "Activating security layer");
connector->activateSecurityLayer(securityLayer);
} else {
QPID_LOG(debug, "No security layer in place");
}
failover.reset(new FailoverListener(shared_from_this(), handler.knownBrokersUrls));
}
void ConnectionImpl::idleIn()
{
connector->abort();
}
void ConnectionImpl::idleOut()
{
AMQFrame frame((AMQHeartbeatBody()));
connector->send(frame);
}
void ConnectionImpl::close()
{
if (!handler.isOpen()) return;
if (heartbeatTask) {
heartbeatTask->cancel();
}
handler.close();
closed(CLOSE_CODE_NORMAL, "Closed by client");
}
template <class F> void ConnectionImpl::closeInternal(const F& f) {
if (heartbeatTask) {
heartbeatTask->cancel();
}
{
Mutex::ScopedUnlock u(lock);
connector->close();
}
//notifying sessions of failure can result in those session being
//deleted which in turn results in a call to erase(); this can
//even happen on this thread, when 's' goes out of scope
//below. Using a copy prevents the map being modified as we
//iterate through.
SessionMap copy;
sessions.swap(copy);
for (SessionMap::iterator i = copy.begin(); i != copy.end(); ++i) {
boost::shared_ptr<SessionImpl> s = i->second.lock();
if (s) f(s);
}
}
void ConnectionImpl::closed(uint16_t code, const std::string& text) {
Mutex::ScopedLock l(lock);
setException(new ConnectionException(ConnectionHandler::convert(code), text));
closeInternal(boost::bind(&SessionImpl::connectionClosed, _1, code, text));
}
static const std::string CONN_CLOSED("Connection closed");
void ConnectionImpl::shutdown() {
if ( failureCallback )
failureCallback();
if (handler.isClosed()) return;
// FIXME aconway 2008-06-06: exception use, amqp0-10 does not seem to have
// an appropriate close-code. connection-forced is not right.
bool isClosing = handler.isClosing();
handler.fail(CONN_CLOSED);//ensure connection is marked as failed before notifying sessions
Mutex::ScopedLock l(lock);
if (!isClosing)
closeInternal(boost::bind(&SessionImpl::connectionBroke, _1, CONN_CLOSED));
setException(new TransportFailure(CONN_CLOSED));
}
void ConnectionImpl::erase(uint16_t ch) {
Mutex::ScopedLock l(lock);
sessions.erase(ch);
}
const ConnectionSettings& ConnectionImpl::getNegotiatedSettings()
{
return handler;
}
std::vector<qpid::Url> ConnectionImpl::getKnownBrokers() {
return failover ? failover->getKnownBrokers() : handler.knownBrokersUrls;
}
boost::shared_ptr<SessionImpl> ConnectionImpl::newSession(const std::string& name, uint32_t timeout, uint16_t channel) {
boost::shared_ptr<SessionImpl> simpl(new SessionImpl(name, shared_from_this()));
addSession(simpl, channel);
simpl->open(timeout);
return simpl;
}
void ConnectionImpl::stopFailoverListener() { failover->stop(); }
}} // namespace qpid::client
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