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/*
* Copyright (c) 2010 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.component;
import com.isode.stroke.network.Connection;
import com.isode.stroke.network.JavaConnection;
import com.isode.stroke.network.Timer;
import com.isode.stroke.network.HostAddressPort;
import com.isode.stroke.network.DomainNameResolveError;
import com.isode.stroke.network.DomainNameAddressQuery;
import com.isode.stroke.network.DomainNameResolver;
import com.isode.stroke.network.ConnectionFactory;
import com.isode.stroke.network.TimerFactory;
import com.isode.stroke.network.HostAddress;
import com.isode.stroke.signals.Signal1;
import com.isode.stroke.signals.SignalConnection;
import com.isode.stroke.signals.Slot2;
import com.isode.stroke.signals.Slot1;
import com.isode.stroke.signals.Slot;
import java.util.Vector;
import java.util.Collection;
public class ComponentConnector {
private String hostname = "";
private int port;
private DomainNameResolver resolver;
private ConnectionFactory connectionFactory;
private TimerFactory timerFactory;
private int timeoutMilliseconds;
private Timer timer;
private DomainNameAddressQuery addressQuery;
private Vector<HostAddress> addressQueryResults = new Vector<HostAddress>();
private Connection currentConnection;
private SignalConnection onConnectFinishedConnection;
private SignalConnection onTickConnection;
private SignalConnection onResultConnection;
public ComponentConnector(final String hostname, int port, DomainNameResolver resolver, ConnectionFactory connectionFactory, TimerFactory timerFactory) {
this.hostname = hostname;
this.port = port;
this.resolver = resolver;
this.connectionFactory = connectionFactory;
this.timerFactory = timerFactory;
this.timeoutMilliseconds = 0;
}
public static ComponentConnector create(final String hostname, int port, DomainNameResolver resolver, ConnectionFactory connectionFactory, TimerFactory timerFactory) {
return new ComponentConnector(hostname, port, resolver, connectionFactory, timerFactory);
}
public void setTimeoutMilliseconds(int milliseconds) {
timeoutMilliseconds = milliseconds;
}
public void start() {
assert(currentConnection == null);
assert(timer == null);
assert(addressQuery == null);
addressQuery = resolver.createAddressQuery(hostname);
onResultConnection = addressQuery.onResult.connect(new Slot2<Collection<HostAddress>, DomainNameResolveError>() {
@Override
public void call(Collection<HostAddress> c1, DomainNameResolveError d1) {
handleAddressQueryResult(c1, d1);
}
});
if (timeoutMilliseconds > 0) {
timer = timerFactory.createTimer(timeoutMilliseconds);
onTickConnection = timer.onTick.connect(new Slot() {
@Override
public void call() {
handleTimeout();
}
});
timer.start();
}
addressQuery.run();
}
public void stop() {
finish((Connection)null);
}
public final Signal1<Connection> onConnectFinished = new Signal1<Connection>();
private void handleAddressQueryResult(final Collection<HostAddress> addresses, DomainNameResolveError error) {
addressQuery = null;
if (error != null || addresses.isEmpty()) {
finish((Connection)null);
}
else {
addressQueryResults.addAll(addresses);
tryNextAddress();
}
}
private void tryNextAddress() {
assert(!addressQueryResults.isEmpty());
HostAddress address = addressQueryResults.remove(0);
tryConnect(new HostAddressPort(address, port));
}
private void tryConnect(final HostAddressPort target) {
assert(currentConnection == null);
currentConnection = connectionFactory.createConnection();
onConnectFinishedConnection = currentConnection.onConnectFinished.connect(new Slot1<Boolean>() {
@Override
public void call(Boolean b) {
handleConnectionConnectFinished(b);
}
});
currentConnection.connect(target);
}
private void handleConnectionConnectFinished(boolean error) {
onConnectFinishedConnection.disconnect();
if (error) {
currentConnection = null;
if (!addressQueryResults.isEmpty()) {
tryNextAddress();
}
else {
finish((Connection)null);
}
}
else {
finish(currentConnection);
}
}
private void finish(Connection connection) {
if (timer != null) {
timer.stop();
onTickConnection.disconnect();
timer = null;
}
if (addressQuery != null) {
onResultConnection.disconnect();
addressQuery = null;
}
if (currentConnection != null) {
onConnectFinishedConnection.disconnect();
currentConnection = null;
}
onConnectFinished.emit(connection);
}
private void handleTimeout() {
finish((Connection)null);
}
}
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Swift