radio/lib/wServerUtils/connector.cpp

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#include "connector.h"
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#include "commands.h"
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U::Connector::Connector(W::Dispatcher* dp, W::Server* srv, U::Commands* cmds, QObject* parent):
QObject(parent),
dispatcher(dp),
server(srv),
commands(cmds),
nodes(),
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ignoredNodes(),
controllers()
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{
connect(server, SIGNAL(newConnection(const W::Socket&)), SLOT(onNewConnection(const W::Socket&)));
connect(server, SIGNAL(closedConnection(const W::Socket&)), SLOT(onClosedConnection(const W::Socket&)));
W::String cn = W::String(u"connect");
W::Handler* ch = W::Handler::create(commands->getAddress() + W::Address({cn}), this, &U::Connector::_h_connect);
W::Vocabulary vc;
vc.insert(u"address", W::Uint64(W::Object::string));
vc.insert(u"port", W::Uint64(W::Object::uint64));
commands->addCommand(cn, ch, vc);
commands->enableCommand(cn, true);
}
U::Connector::~Connector()
{
commands->removeCommand(W::String(u"connect"));
Map::const_iterator itr = nodes.begin();
Map::const_iterator end = nodes.begin();
W::String dc = W::String(u"disconnect");
for (; itr != end; ++itr) {
commands->removeCommand(dc + itr->first);
}
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std::multimap<W::String, C::Controller*>::const_iterator cbeg = controllers.begin();
std::multimap<W::String, C::Controller*>::const_iterator cend = controllers.end();
for (; cbeg != cend; ++cbeg) {
C::Controller* ctrl = cbeg->second;
if (ctrl->isSubscribed()) {
ctrl->unsubscribe();
ctrl->unregisterController();
}
}
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}
void U::Connector::addIgnoredNode(const W::String& name)
{
ignoredNodes.insert(name);
}
void U::Connector::sendTo(const W::String& name, const W::Event& event)
{
Map::const_iterator itr = nodes.find(name);
if (itr != nodes.end()) {
throw new NodeAccessError(name);
} else {
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server->getConnection(itr->second)->send(event);
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}
}
void U::Connector::onNewConnection(const W::Socket& socket)
{
W::String name = socket.getRemoteName();
std::set<W::String>::const_iterator ign = ignoredNodes.find(name);
if (ign == ignoredNodes.end()) {
Map::const_iterator itr = nodes.find(name);
if (itr == nodes.end()) {
if (server->getName() == name) {
emit serviceMessage("An attempt to connect node to itself, closing connection");
server->closeConnection(socket.getId());
} else {
W::String dc = W::String(u"disconnect");
W::String dn = dc + name;
W::Handler* dh = W::Handler::create(commands->getAddress() + W::Address({dc, name}), this, &U::Connector::_h_disconnect);
commands->addCommand(dn, dh, W::Vocabulary());
commands->enableCommand(dn, true);
nodes.insert(std::make_pair(name, socket.getId()));
emit serviceMessage(QString("New connection, id: ") + socket.getId().toString().c_str());
connect(&socket, SIGNAL(message(const W::Event&)), dispatcher, SLOT(pass(const W::Event&)));
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std::multimap<W::String, C::Controller*>::const_iterator beg = controllers.lower_bound(name);
std::multimap<W::String, C::Controller*>::const_iterator end = controllers.upper_bound(name);
for (; beg != end; ++beg) {
beg->second->registerController(dispatcher, &socket);
beg->second->subscribe();
}
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emit nodeConnected(name);
}
} else {
emit serviceMessage(QString("Node ") + QString(name.toString().c_str()) + " tried to connect, but connection with that node is already open, closing new connection");
server->closeConnection(socket.getId());
}
} else {
emit serviceMessage(QString("New connection, id: ") + socket.getId().toString().c_str());
connect(&socket, SIGNAL(message(const W::Event&)), dispatcher, SLOT(pass(const W::Event&)));
}
}
void U::Connector::onClosedConnection(const W::Socket& socket)
{
emit serviceMessage(QString("Connection closed, id: ") + socket.getId().toString().c_str());
W::String name = socket.getRemoteName();
std::set<W::String>::const_iterator ign = ignoredNodes.find(name);
if (ign == ignoredNodes.end()) {
Map::const_iterator itr = nodes.find(name);
if (itr != nodes.end()) {
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std::multimap<W::String, C::Controller*>::const_iterator beg = controllers.lower_bound(name);
std::multimap<W::String, C::Controller*>::const_iterator end = controllers.upper_bound(name);
for (; beg != end; ++beg) {
beg->second->unsubscribe();
beg->second->unregisterController();
}
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emit nodeDisconnected(name);
commands->removeCommand(W::String(u"disconnect") + name);
nodes.erase(itr);
}
}
}
void U::Connector::h_connect(const W::Event& ev)
{
const W::Vocabulary& vc = static_cast<const W::Vocabulary&>(ev.getData());
const W::String& addr = static_cast<const W::String&>(vc.at(u"address"));
const W::Uint64& port = static_cast<const W::Uint64&>(vc.at(u"port"));
server->openConnection(addr, port);
}
void U::Connector::h_disconnect(const W::Event& ev)
{
const W::Address& addr = static_cast<const W::Address&>(ev.getDestination());
const W::String& name = addr.back();
Map::const_iterator itr = nodes.find(name);
server->closeConnection(itr->second);
}
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const W::Socket* U::Connector::getNodeSocket(const W::String& name)
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{
Map::const_iterator itr = nodes.find(name);
if (itr == nodes.end()) {
throw new NodeAccessError(name);
}
return server->getConnection(itr->second);
}
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void U::Connector::registerHandler(W::Handler* handler)
{
dispatcher->registerHandler(handler);
}
void U::Connector::unregisterHandler(W::Handler* handler)
{
dispatcher->unregisterHandler(handler);
}
const W::Socket * U::Connector::getConnection(uint64_t p_id) const
{
return server->getConnection(p_id);
}
void U::Connector::passThroughDispatcher(const W::Event& ev) const
{
dispatcher->pass(ev);
}
void U::Connector::registerController(C::Controller* ctrl, const W::String& node)
{
std::set<W::String>::const_iterator iitr = ignoredNodes.find(node);
if (iitr != ignoredNodes.end()) {
throw 3; //this means you're trying to receive something from one of ignored nodes, which never going to be handled in connector, most probably it's a mistake
}
controllers.insert(std::make_pair(node, ctrl));
Map::const_iterator itr = nodes.find(node);
if (itr != nodes.end()) {
ctrl->registerController(dispatcher, server->getConnection(itr->second));
ctrl->subscribe(); //let's say I always need them subscribed, for now at least
}
}
void U::Connector::unregisterController(C::Controller* ctrl, const W::String& node)
{
bool found = false;
std::multimap<W::String, C::Controller*>::const_iterator beg = controllers.lower_bound(node);
std::multimap<W::String, C::Controller*>::const_iterator end = controllers.upper_bound(node);
for (; beg != end; ++beg) {
if (beg->second == ctrl) {
found = true; //TODO make a proper way to store 'em
break;
}
}
if (!found) {
throw 4;
}
if (ctrl->isSubscribed()) {
ctrl->unsubscribe();
ctrl->unregisterController();
}
controllers.erase(beg);
}