Hi,

I'm really stumped on how to create separate threads in JavaFX. I've tried everything I've found on the internet including using a java class that extends runnable and using EventQueue.invokeLater(). This just stops the JavaFX thread while running the Java code in invokeLater()

JavaFX 1.2 has included java.async.Task, but I have no idea how to use this, there are no resources on the internet.

At the moment, I'm calling RMI on a java servlet, and the GUI freezes while the methods wait for a return type.

Any help would be appreciated.

 

 

JavaTaskBase can be used for an asynchronous java code execution.

For example:

MyRunnableFuture.java

import javafx.async.RunnableFuture;
 
public class MyRunnableFuture implements RunnableFuture{
 
    public void run() throws Exception {
        while(true){
            System.out.println("Inifinity Loop!");
        }
    }
 
}

Main.fx

class MyTask extends JavaTaskBase{
 
    override function create():RunnableFuture{
        new MyRunnableFuture();
    }
 
}
 
MyTask{}.start();

 

 

JavaFX code should not be run from objects that support this interface.

RunnableFuture is useless for JavaFX.

 

 

It is also possible to run JavaFX code asynchronously by implemented Task class:

AsyncProgramMoveImpl.java

import javafx.async.*;
import com.sun.javafx.runtime.async.*;
 
 
public class AsyncProgramMoveImpl extends AbstractAsyncOperation{
    RunnableFuture runnable;
 
    AsyncProgramMoveImpl(RunnableFuture runnable, AsyncOperationListener listener) {
        super(listener);
        this.runnable = runnable;
    }
 
    @Override
    public Object call() throws Exception {
        runnable.run();
        return null;
    }
}

JavaFXTaskBase.fx

import javafx.async.Task;
import javafx.async.RunnableFuture;
import com.sun.javafx.runtime.async.AsyncOperationListener;
 
import java.lang.Exception;
 
 
public class JavaFXTaskBase extends Task {
 
    var peer: AsyncProgramMoveImpl;
 
    public var action:function();
 
    public override function start() : Void{
     if (peer == null) {
          peer = new AsyncProgramMoveImpl(RunnableFuture{ override function run(){ action() } }, asyncListener );
          peer.start();
        }
    }
 
    public override function stop() : Void{
    }
 
    var asyncListener = AsyncOperationListener {
        public override function onProgress(progressValue:Integer, progressMax:Integer):Void {}
        public override function onCompletion(value:Object):Void {}
        public override function onCancel():Void {}
        public override function onException(e:Exception):Void{}
   }
}

Main.fx

import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
 
Stage {
    title: "Application title"
    scene: Scene {
        content: Button {
            text: "Asynch Operation"
            action: function() {
                JavaFXTaskBase{
                    action: function(){
                        while(true){
                            println("infinty loop!");
                        }
                    }
                }.start();
            }
        }
    }
}

 

 

look to examplr http://jfxstudio.wordpress.com/2009/06/09/asynchronous-operations-in-javafx/

 

 

import crudfx.util.*;
...
Waiter{
  action:makeQuery
  onDone:updateGUI
  }.serve();

.

How does the Waiter class work?

 

 

it works fine

8)

Sorry, i can't publish source of CRUDfx SDK yet. I need test compatibility with JavaFX v1.2.

 

 

Just show the JavaFX 1.1 code of the Waiter class if it is not a secret.

 

 

нет смысла. Там ничего интересного. Если в целях самообразования то придётся ждать когда я протестю всё по версию 1.2. Отдельные куски я публиковать не буду.

 

 

I wrote a blog about asyn in JavaFX 1.2 at
http://blogs.sun.com/baechul/entry/javafx_1_2_async
Hope this help someone.

Edited by: bestgo on Jun 12, 2009 1:46 PM

 

 

So what happens if you create a JAVA thread on the JavaFX GUI thread?

    Thread daemonThread = new Thread(){
      @Override
      public void run(){
          //do stuff
      }
    };
    daemonThread.setDaemon(true);
    daemonThread.start();

Can/will the new thread still block/deadlock the gui thread? Or do new JAVA threads need to be created/forked off a RunnableFuture/Task? I've got deadlock, I can see how JavaFX thread/async works - but where JAVA threads belong isn't clear. We have a lot of daemon threaded Java code, I don't want to (and can't) re-write everything to be based on JavaFX's Async.

Cheers.