+/*

+ * Copyright (c) 2010 Remko Tronçon

+ * Licensed under the GNU General Public License v3.

+ * See Documentation/Licenses/GPLv3.txt for more information.

+ */

+

+#include "Swiften/Component/ComponentConnector.h"

+

+#include <boost/bind.hpp>

+#include <iostream>

+

+#include "Swiften/Network/ConnectionFactory.h"

+#include "Swiften/Network/DomainNameResolver.h"

+#include "Swiften/Network/DomainNameAddressQuery.h"

+#include "Swiften/Network/TimerFactory.h"

+

+namespace Swift {

+

+ComponentConnector::ComponentConnector(const String& hostname, int 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(boost::shared_ptr<Connection>());

+}

+

+

+void ComponentConnector::handleAddressQueryResult(const std::vector<HostAddress>& addresses, boost::optional<DomainNameResolveError> error) {

+ addressQuery.reset();

+ if (error || addresses.empty()) {

+ finish(boost::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(boost::shared_ptr<Connection>());

+ }

+ }

+ else {

+ finish(currentConnection);

+ }

+}

+

+void ComponentConnector::finish(boost::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(boost::shared_ptr<Connection>());

+}

+

+};