Re: Simple test failed to run.

10 Oct 2001 08:45:42 -0000

Title: Simple test failed to run.
DefaultTimeScheduler is a __Block__. not a general object. Block managed by phoenix.
 
PS please use plain text. don't use html. ;-)
----- Original Message -----
From: Xin, Wayne
Sent: Wednesday, October 10, 2001 6:07 AM
Subject: Simple test failed to run.

I got a NullPointerException when trying to run the a simple test class on DefaultTimeScheduler.start(). Since I don't have an example, I'm hoping someone can tell me what went wrong.

------------------------- error output ---------------------------
C:\MySoftwares\jbuilder5\jdk1.3\bin\javaw -classpath "C:\Personal\projects\Aim\Scheduler\AvalonSchedulerTest\classes;C:\Personal\projects\Aim\Scheduler\jakarta-avalon-cornerstone\lib\avalon-framework.jar;C:\Personal\projects\Aim\Scheduler\jakarta-avalon-cornerstone\build\lib\cornerstone.jar;C:\Personal\projects\Aim\Scheduler\jakarta-avalon-cornerstone\build\lib\phoenix-client.jar;C:\Personal\projects\Aim\Scheduler\jakarta-avalon-cornerstone\build\lib\avalon-excalibur-4.0.jar;C:\MySoftwares\jbuilder5\jdk1.3\demo\jfc\Java2D\Java2Demo.jar;C:\MySoftwares\jbuilder5\jdk1.3\jre\lib\i18n.jar;C:\MySoftwares\jbuilder5\jdk1.3\jre\lib\jaws.jar;C:\MySoftwares\jbuilder5\jdk1.3\jre\lib\rt.jar;C:\MySoftwares\jbuilder5\jdk1.3\jre\lib\sunrsasign.jar;C:\MySoftwares\jbuilder5\jdk1.3\lib\dt.jar;C:\MySoftwares\jbuilder5\jdk1.3\lib\tools.jar"  AvalonSchedulerTest

java.lang.NullPointerException  at org.apache.avalon.cornerstone.blocks.scheduler.DefaultTimeScheduler.start(DefaultTimeScheduler.java:208)     at AvalonSchedulerTest.main(AvalonSchedulerTest.java:30)

--------------------------- end error output -----------------------

--------------------------- my simple test --------------------------
import org.apache.avalon.cornerstone.services.scheduler.Target;
import org.apache.avalon.cornerstone.services.scheduler.TimeTrigger;
import org.apache.avalon.cornerstone.services.scheduler.TimeScheduler;
import org.apache.avalon.cornerstone.services.scheduler.PeriodicTimeTrigger;
import org.apache.avalon.cornerstone.blocks.scheduler.DefaultTimeScheduler;

public class AvalonSchedulerTest
{
    public static void main( String[] args )
    {
        // AvalonSchedulerTest ast = new AvalonSchedulerTest();
        Target aTarget = new Target() {
            public void targetTriggered(String triggerName)
            {
                System.out.println("Event happening - " + triggerName);
            }
        };
        TimeTrigger aTrigger = new PeriodicTimeTrigger(1000, 1000);
        DefaultTimeScheduler dts = new DefaultTimeScheduler();
        dts.initialize();
        dts.addTrigger("A Trigger", aTrigger, (Target) aTarget);

        try
        {
            dts.start();
        } catch (Exception ex)
        {
            ex.printStackTrace();
        }

    }

}

-Wayne Xin

-----Original Message-----
From: Uli Mayring [mailto:[EMAIL PROTECTED]]
Sent: Monday, October 08, 2001 1:39 PM
To: Avalon Development
Subject: Re: Cornerstone & scheduler


On Mon, 8 Oct 2001, Xin, Wayne wrote:

> I'm wondering what timeframe the Avalon/Cornerstone is going to be ready.
> Actually, I only need a simple java based scheduler. If you know any other
> projects that contains this mechanism, please let me know. Thank you.

You can use Avalon if you only need the scheduler, it seems to work quite
well. However, there is no documentation for it, just an example program.

Ulrich

--
Ulrich Mayring
DENIC eG, Softwareentwicklung


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