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/*
* Copyright (c) 2010-2018 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Component/ComponentConnector.h>
#include <boost/bind.hpp>
#include <Swiften/Network/ConnectionFactory.h>
#include <Swiften/Network/DomainNameAddressQuery.h>
#include <Swiften/Network/DomainNameResolver.h>
#include <Swiften/Network/TimerFactory.h>
namespace Swift {
ComponentConnector::ComponentConnector(const std::string& hostname, unsigned short port, DomainNameResolver* resolver, ConnectionFactory* connectionFactory, TimerFactory* timerFactory) : hostname(hostname), port(port), resolver(resolver), connectionFactory(connectionFactory), timerFactory(timerFactory), timeoutMilliseconds(0) {
}
void ComponentConnector::setTimeoutMilliseconds(int milliseconds) {
timeoutMilliseconds = milliseconds;
}
void ComponentConnector::start() {
assert(!currentConnection);
assert(!timer);
assert(!addressQuery);
addressQuery = resolver->createAddressQuery(hostname);
addressQuery->onResult.connect(boost::bind(&ComponentConnector::handleAddressQueryResult, shared_from_this(), _1, _2));
if (timeoutMilliseconds > 0) {
timer = timerFactory->createTimer(timeoutMilliseconds);
timer->onTick.connect(boost::bind(&ComponentConnector::handleTimeout, shared_from_this()));
timer->start();
}
addressQuery->run();
}
void ComponentConnector::stop() {
finish(std::shared_ptr<Connection>());
}
void ComponentConnector::handleAddressQueryResult(const std::vector<HostAddress>& addresses, boost::optional<DomainNameResolveError> error) {
addressQuery.reset();
if (error || addresses.empty()) {
finish(std::shared_ptr<Connection>());
}
else {
addressQueryResults = std::deque<HostAddress>(addresses.begin(), addresses.end());
tryNextAddress();
}
}
void ComponentConnector::tryNextAddress() {
assert(!addressQueryResults.empty());
HostAddress address = addressQueryResults.front();
addressQueryResults.pop_front();
tryConnect(HostAddressPort(address, port));
}
void ComponentConnector::tryConnect(const HostAddressPort& target) {
assert(!currentConnection);
currentConnection = connectionFactory->createConnection();
currentConnection->onConnectFinished.connect(boost::bind(&ComponentConnector::handleConnectionConnectFinished, shared_from_this(), _1));
currentConnection->connect(target);
}
void ComponentConnector::handleConnectionConnectFinished(bool error) {
currentConnection->onConnectFinished.disconnect(boost::bind(&ComponentConnector::handleConnectionConnectFinished, shared_from_this(), _1));
if (error) {
currentConnection.reset();
if (!addressQueryResults.empty()) {
tryNextAddress();
}
else {
finish(std::shared_ptr<Connection>());
}
}
else {
finish(currentConnection);
}
}
void ComponentConnector::finish(std::shared_ptr<Connection> connection) {
if (timer) {
timer->stop();
timer->onTick.disconnect(boost::bind(&ComponentConnector::handleTimeout, shared_from_this()));
timer.reset();
}
if (addressQuery) {
addressQuery->onResult.disconnect(boost::bind(&ComponentConnector::handleAddressQueryResult, shared_from_this(), _1, _2));
addressQuery.reset();
}
if (currentConnection) {
currentConnection->onConnectFinished.disconnect(boost::bind(&ComponentConnector::handleConnectionConnectFinished, shared_from_this(), _1));
currentConnection.reset();
}
onConnectFinished(connection);
}
void ComponentConnector::handleTimeout() {
finish(std::shared_ptr<Connection>());
}
}
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Swift