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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <Eris/BaseConnection.h>
#include <Eris/Exceptions.h>
#include <Eris/Timeout.h>
#include <Eris/Poll.h>
#include <Eris/Log.h>
#include <Atlas/Codec.h>
#include <Atlas/Net/Stream.h>
#include <Atlas/Objects/Encoder.h>
#include <skstream/skstream.h>
#include <cassert>
namespace Eris {
////////////////////////////////////////////////////////////////////////////////////////////////////////
BaseConnection::BaseConnection(const std::string &cnm,
const std::string &id,
Atlas::Bridge *br) :
_sc(NULL),
_status(DISCONNECTED),
_id(id),
_stream(NULL),
_clientName(cnm),
_bridge(br),
_timeout(NULL),
_host(""),
_port(0)
{
assert(_bridge);
//_stream = new tcp_socket_stream();
}
BaseConnection::~BaseConnection()
{
if (_status != DISCONNECTED) {
hardDisconnect(true);
}
//delete _stream;
}
void BaseConnection::connect(const std::string &host, short port)
{
if (_stream != NULL) {
log(LOG_WARNING, "in base connection :: connect, had existing stream, discarding it");
hardDisconnect(true);
}
_host = host;
_port = port;
// start timeout
_timeout = new Timeout("connect_" + _id, this, 5000);
bindTimeout(*_timeout, CONNECTING);
setStatus(CONNECTING);
_stream = new tcp_socket_stream(host, port, true);
Poll::instance().addStream(_stream, Poll::WRITE);
log(LOG_DEBUG, "Stream added to poller");
}
void BaseConnection::hardDisconnect(bool emit)
{
if (!_stream) {
log(LOG_WARNING, "in baseConnection::hardDisconnect with a NULL stream!");
} else {
// okay, tear it down
if ((_status == CONNECTED) || (_status == DISCONNECTING)){
_codec->streamEnd();
(*_stream) << std::flush;
delete _codec;
delete _encode;
delete _msgEncode;
} else if (_status == NEGOTIATE) {
delete _sc;
_sc = NULL;
} else if (_status == CONNECTING){
// nothing to be done, but can happen
} else
throw InvalidOperation("Bad connection state for disconnection");
delete _timeout;
_timeout = NULL;
Poll::instance().removeStream(_stream);
delete _stream;
_stream = NULL;
}
if (emit) {
Disconnected.emit();
setStatus(DISCONNECTED);
} else
_status = DISCONNECTED;
}
void BaseConnection::recv()
{
int err = 0;
assert(_status != DISCONNECTED);
assert(_stream);
if (_stream->getSocket() == INVALID_SOCKET) {
handleFailure("Connection stream closed unexpectedly");
hardDisconnect(false);
} else {
switch (_status) {
case CONNECTING:
nonblockingConnect();
break;
case NEGOTIATE:
pollNegotiation();
break;
case CONNECTED:
case DISCONNECTING:
_codec->poll();
break;
default:
throw InvalidOperation("Unexpected connection status in poll()");
}
}
// another paranoid check
if (_stream && (err = _stream->getLastError()) != 0) {
char msgBuf[128];
::snprintf(msgBuf, 128, "recv() got stream failure, error %d", _stream->getLastError());
handleFailure(msgBuf);
hardDisconnect(false);
}
}
void BaseConnection::nonblockingConnect()
{
assert(_stream);
if (!_stream->isReady())
return;
if(!_stream->is_open()) {
handleFailure("Failed to connect to " + _host);
hardDisconnect(false);
return;
}
Poll::instance().changeStream(_stream, Poll::READ);
// negotiation timeout
delete _timeout;
_timeout = new Timeout("negotiate_" + _id, this, 5000);
bindTimeout(*_timeout, NEGOTIATE);
_sc = new Atlas::Net::StreamConnect(_clientName,
*_stream, _bridge);
setStatus(NEGOTIATE);
}
void BaseConnection::pollNegotiation()
{
if (!_sc || (_status != NEGOTIATE)) {
log(LOG_DEBUG, "pollNegotiation: unexpected connection status");
throw InvalidOperation("pollNegotiation: unexpected connection status");
}
_sc->poll();
if (_sc->getState() == Atlas::Negotiate<std::iostream>::IN_PROGRESS)
// more negotiation to do once more netwrok data arrives
return;
if (_sc->getState() == Atlas::Negotiate<std::iostream>::SUCCEEDED) {
log(LOG_DEBUG, "Negotiation Success");
_codec = _sc->getCodec();
_encode = new Atlas::Objects::Encoder(_codec);
_codec->streamBegin();
_msgEncode = new Atlas::Message::Encoder(_codec);
// clean up
delete _sc;
_sc = NULL;
delete _timeout;
_timeout = NULL;
setStatus(CONNECTED);
onConnect();
} else {
// assume it all went wrong
handleFailure("Atlas negotiation failed");
hardDisconnect(false);
}
}
void BaseConnection::onConnect()
{
// tell anyone who cares with a signal
Connected.emit();
}
void BaseConnection::setStatus(Status sc)
{
_status = sc;
}
int BaseConnection::getFileDescriptor()
{
if (!_stream)
throw InvalidOperation("Not connected, hence no FD");
return _stream->getSocket();
}
} // of namespace
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