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/*
* Copyright (c) 2011-2015 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
/*
* Copyright (c) 2015 Tarun Gupta.
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
package com.isode.stroke.network;
import java.util.Vector;
import java.util.logging.Logger;
import com.isode.stroke.signals.Signal2;
import com.isode.stroke.signals.Slot2;
import com.isode.stroke.signals.SignalConnection;
import com.isode.stroke.network.Connection;
public class ChainedConnector {
private String hostname = "";
private int port;
private String serviceLookupPrefix;
private DomainNameResolver resolver;
private Vector<ConnectionFactory> connectionFactories = new Vector<ConnectionFactory>();
private TimerFactory timerFactory;
private int timeoutMilliseconds;
private Vector<ConnectionFactory> connectionFactoryQueue = new Vector<ConnectionFactory>();
private Connector currentConnector;
private com.isode.stroke.base.Error lastError;
private Logger logger_ = Logger.getLogger(this.getClass().getName());
private SignalConnection onConnectFinishedConnection;
public ChainedConnector(final String hostname, int port, final String serviceLookupPrefix, DomainNameResolver resolver, final Vector<ConnectionFactory> connectionFactories, TimerFactory timer) {
this.hostname = hostname;
this.port = port;
this.serviceLookupPrefix = serviceLookupPrefix;
this.resolver = resolver;
this.connectionFactories = connectionFactories;
this.timerFactory = timer;
this.timeoutMilliseconds = 0;
}
protected void finalize() throws Throwable {
try {
if (currentConnector != null) {
onConnectFinishedConnection.disconnect();
currentConnector.stop();
currentConnector = null;
}
}
finally {
super.finalize();
}
}
public void setTimeoutMilliseconds(int milliseconds) {
timeoutMilliseconds = milliseconds;
}
public void start() {
logger_.fine("Starting queued connector for " + hostname + "\n");
connectionFactoryQueue = new Vector<ConnectionFactory>(connectionFactories);
tryNextConnectionFactory();
}
public void stop() {
if (currentConnector != null) {
onConnectFinishedConnection.disconnect();
currentConnector.stop();
currentConnector = null;
}
finish((Connection)null, (com.isode.stroke.base.Error)null);
}
public final Signal2<Connection, com.isode.stroke.base.Error> onConnectFinished = new Signal2<Connection, com.isode.stroke.base.Error>();
private void finish(Connection connection, com.isode.stroke.base.Error error) {
onConnectFinished.emit(connection, error);
}
private void tryNextConnectionFactory() {
assert(currentConnector == null);
if (connectionFactoryQueue.isEmpty()) {
logger_.fine("No more connection factories\n");
finish((Connection)null, lastError);
}
else {
ConnectionFactory connectionFactory = connectionFactoryQueue.firstElement();
logger_.fine("Trying next connection factory: " + connectionFactory + "\n");
connectionFactoryQueue.remove(connectionFactoryQueue.firstElement());
currentConnector = Connector.create(hostname, port, serviceLookupPrefix, resolver, connectionFactory, timerFactory);
currentConnector.setTimeoutMilliseconds(timeoutMilliseconds);
onConnectFinishedConnection = currentConnector.onConnectFinished.connect(new Slot2<Connection, com.isode.stroke.base.Error>() {
@Override
public void call(Connection connection, com.isode.stroke.base.Error error) {
handleConnectorFinished(connection, error);
}
});
currentConnector.start();
}
}
private void handleConnectorFinished(Connection connection, com.isode.stroke.base.Error error) {
logger_.fine("Connector finished\n");
onConnectFinishedConnection.disconnect();
lastError = error;
currentConnector = null;
if (connection != null) {
finish(connection, error);
}
else {
tryNextConnectionFactory();
}
}
}
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Swift