Re: [Wrapper-user] questions about "Method 3 - WrapperListener Integration"

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Hi Christian,
It work!
Thanks for you kindly help.

Best Regards,
Hugo.
From: Christian Mueller [mailto:chr...@ta...]
Sent: Wednesday, December 19, 2012 9:29 AM
To: wra...@li...
Subject: Re: [Wrapper-user] questions about "Method 3 - WrapperListener Integration"

Hello Hugo,

the JVM is running as long as there is a non daemon thread running inside the JVM. It appears that when you return from the start() function that's not the case, so the JVM is initiating the shutdown.

While the start function has to return in a given time, you can launch a thread in there, which for instance calls your main method, starts your app, etc.
For instance:

public Integer start(String[] arg0) {
    new java.lang.Thread(this).start();
    return null;
}

public void run() {
    /*
       invoke your application
    */
}

In most cases integration method #1 using the WrapperSimpleApp is the best choice for running your application with the Java quite out of the box, so if there is no immediate requirement for method #3, I'd recommend also using integration method #1.

Please let me know if you have any further questions.

Thank you,

Christian Mueller
Tanuki Software, Ltd.

On Tue, Dec 18, 2012 at 6:47 PM, hug...@tr...<mailto:hug...@tr...> <hug...@tr...<mailto:hug...@tr...>> wrote:
Hi Christian,
Thanks for your response,
But I still don't know why it always start and then stop immediately even I never set wrapper.listener.force_stop to True,
I indeed saw the service status changed to 'started' and resume to 'stop' soon.
My start function as below:

public Integer start( String[] args )
{

System.out.println(TAG + "start>>>>>>>>>>>>>>>>>>>>> ");
//appStart();
    System.out.println(TAG + "start<<<<<<<<<<<<<<<<<<<< ");
    return null;
}

I use the wrapper-windows-x86-32-3.5.15 (Community) and jre-6u33-windows-i586

Could you help to provide some troubleshooting steps to find my environment issue?

Thanks.
Hugo.

From: Christian Mueller [mailto:chr...@ta...<mailto:chr...@ta...>]
Sent: Monday, December 17, 2012 10:25 AM
To: wra...@li...<mailto:wra...@li...>
Subject: Re: [Wrapper-user] questions about "Method 3 - WrapperListener Integration"

Hello Hugo,

thank you very much for your interest in the Java Service Wrapper.

The start() function is being called from the WrapperManager during startup and is the place where you can initiate the startup of your application.

The return value of the start function indicates the result of the startup, whereas for instance, 'null' indicates a successful start-up and thereafter the state engine of the Wrapper will switch to 'started'. If any other value than null is returned then this indicates that the start-up has failed and the Wrapper will stop and initiate the shutdown return value also indicates the exit code of the Wrapper.

If the start method is not returning anything but calling for instance System.exit(), the JVM naturally will shutdown, trigger it's shutdown hooks etc. Since the JVM is already shutting down, the stop() function of your WrapperListener implantation won't be called unless wrapper.listener.force_stop isn't set to TRUE.

Please let me know if you have any further questions.

Thank you,

Christian Mueller
Tanuki Software, Ltd.
On Fri, Dec 14, 2012 at 6:11 PM, hug...@tr...<mailto:hug...@tr...> <hug...@tr...<mailto:hug...@tr...>> wrote:
Dears,
I am a new guy of the Java Service Wrapper,
I would like to ask some questions about "Method 3 - WrapperListener Integration",

I created a main class like this sample code:
http://wrapper.tanukisoftware.com/doc/english/integrate-listener.html#mainMethod

but It always launch wrapper start and then stop immediately even if I do nothing in start() function just return null,
Is this normal process?

And I saw the following info:
http://wrapper.tanukisoftware.com/doc/english/prop-listener-force-stop.html

When FALSE, the stop method will be called only if the start method returned a value of "NULL" prior to the shutdown process being started.
Are there any relationship with the wrapper.listener.force_stop property?

Could I only launch the start() function without calling stop function immediately?
And keep the windows service status in "started"
Thanks.

Best Regards
Hugo.

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