Homec4science
Diffusion Phabricator (stable) Browse

phab/support/aphlict/client/src/AphlictClient.as
7d255aedba43stable

Last Change
Raw File

AphlictClient.as
View Options

package {
import flash.events.TimerEvent;
import flash.external.ExternalInterface;
import flash.utils.Timer;
final public class AphlictClient extends Aphlict {
/**
* The connection name for this client. This will be used for the
* @{class:LocalConnection} object.
*/
private var client:String;
/**
* The expiry timestamp for the @{class:AphlictMaster}. If this time is
* elapsed then the master will be assumed to be dead and another
* @{class:AphlictClient} will create a master.
*/
private var expiry:Number = 0;
/**
* The interval at which to ping the @{class:AphlictMaster}.
*/
public static const INTERVAL:Number = 3000;
private var master:AphlictMaster;
private var timer:Timer;
private var remoteServer:String;
private var remotePort:Number;
public function AphlictClient() {
super();
ExternalInterface.addCallback('connect', this.externalConnect);
ExternalInterface.call(
'JX.Stratcom.invoke',
'aphlict-component-ready',
null,
{});
}
public function externalConnect(server:String, port:Number):void {
this.externalInvoke('connect');
this.remoteServer = server;
this.remotePort = port;
this.client = AphlictClient.generateClientId();
this.recv.connect(this.client);
this.timer = new Timer(AphlictClient.INTERVAL);
this.timer.addEventListener(TimerEvent.TIMER, this.keepalive);
this.connectToMaster();
}
/**
* Generate a unique identifier that will be used to communicate with the
* @{class:AphlictMaster}.
*/
private static function generateClientId():String {
return 'aphlict_client_' + Math.round(Math.random() * 100000);
}
/**
* Create a new connection to the @{class:AphlictMaster}.
*
* If there is no current @{class:AphlictMaster} instance, then a new master
* will be created.
*/
private function connectToMaster():void {
this.timer.stop();
// Try to become the master.
try {
this.log('Attempting to become the master...');
this.master = new AphlictMaster(this.remoteServer, this.remotePort);
this.log('I am the master.');
} catch (err:ArgumentError) {
this.log('Cannot become the master... probably one already exists');
} catch (err:Error) {
this.error(err);
}
this.send.send('aphlict_master', 'register', this.client);
this.expiry = new Date().getTime() + (5 * AphlictClient.INTERVAL);
this.log('Registered client ' + this.client);
this.timer.start();
}
/**
* Send a keepalive signal to the @{class:AphlictMaster}.
*
* If the connection to the master has expired (because the master has not
* sent a heartbeat signal), then a new connection to master will be
* created.
*/
private function keepalive(event:TimerEvent):void {
if (new Date().getTime() > this.expiry) {
this.connectToMaster();
}
this.send.send('aphlict_master', 'ping', this.client);
}
/**
* This function is used to receive the heartbeat signal from the
* @{class:AphlictMaster}.
*/
public function pong():void {
this.expiry = new Date().getTime() + (2 * AphlictClient.INTERVAL);
}
/**
* Receive a message from the Aphlict Server, via the
* @{class:AphlictMaster}.
*/
public function receiveMessage(msg:Object):void {
this.log('Received message.');
this.externalInvoke('receive', msg);
}
}
}
c4science · Help