Re: [Wrapper-user] Using WrapperStartStopApp with JBoss

[Rob M. <rob...@ya...>]

Thanks, Leif. Very cool. That information would be a nice addition to 
the site. I think it would help explain when you'd want to use one kind 
of wrapper class vs. another.

Gracias!

Rob

Leif Mortenson wrote:

> Rob,
>
>    Starting with Java 1.3, a feature called shutdown hooks were added
> to Java.  A
>
> method was added to the java.lang.Runtime class which allows you to
> register a
>
> Thread which will be started when the JVM starts to shutdown.   This 
> can be
>
> triggered by either hitting CTRL-C or by calling System.exit someplace
> in the
>
> code.
>
>    In the case of the Wrapper, a request by the Wrapper to shutdown the
>
> JVM results in System.exit being called from within the JVM.  This
> results in all
>
> registered shutdown hooks being executed before the JVM actually shuts 
> down.
>
> JBoss registers such a shutdown hook to handle the case where the user
> presses
>
> CTRL-C.  This makes it very easy to integrate with the Wrapper.
>
>    Tomcat on the other hand does not register any shutdown hooks and
> will this
>
> shutdown hard if you hit CTRL-C in the console.  In order to shut it
> down cleanly
>
> another class must be executed.  That is why its integration makes use
> of the
>
> WrapperStartStopApp helper class.
>
>
>
>    As a note, if you want your application to exit the JVM without
> executing any
>
> shutdown hooks you can do so by calling Runtime.getRuntime.halt()
>
>
>
>    Cheers,
>
>    Leif
>
>
>
> Rob Moore wrote:
>
>
>
>> Hi, Leif,
>
>
>>
>
>> Thanks for your response. The WrapperSimpleApp is working fine, but I 
>
>
>> just had the understanding that I needed to notify JBoss to shut 
>
>
>> itself down properly. From what you are saying, this is the case by 
>
>
>> default. I'm just curious how this is communicated to JBoss -- is it 
>
>
>> equivalent to hitting control-c in the console window?
>
>
>>
>
>> Rob
>
>
>>
>
>> Leif Mortenson wrote:
>
>
>>
>
>>> Rob,
>>
>
>>>
>
>>>    I have never tried that integration method with JBoss.  Is there a
>>
>
>>> reason why the
>>
>
>>>
>
>>> WrapperSimpleApp method is not working for you?  JBoss shuts down 
>>
>
>>> normally
>>
>
>>>
>
>>> using its own shutdown hook so you shouldn't have to be calling a stop
>>
>
>>> method.
>>
>
>>>
>
>>>
>
>>>
>
>>>    When using the WrapperStartStopApp, both the start and stop classes
>>
>
>>> are loaded
>>
>
>>>
>
>>> using the same class path.  This will only work for applications which
>>
>
>>> allow that.
>>
>
>>>
>
>>>
>
>>>
>
>>>    Also what are the errors you are seeing so I can help you without
>>
>
>>> trying to
>>
>
>>>
>
>>> reproduce your configuration in the dark.
>>
>
>>>
>
>>>
>
>>>
>
>>> Cheers,
>>
>
>>>
>
>>> Leif
>>
>
>>>
>
>>>
>
>>>
>
>>> Rob Moore wrote:
>>
>
>>>
>
>>>
>
>>>
>
>>>> Has anybody been able to get WrapperStartStopApp to work successfully
>>>
>
>>>
>
>>>
>
>>>
>
>>>> with JBoss?
>>>
>
>>>
>
>>>
>
>>>
>
>>>>
>
>>>
>
>>>> I would like to use the WrapperStartStopApp with JBoss, but I get
>>>
>
>>>
>
>>>
>
>>>
>
>>>> errors when I attempt to do so (I don't see the errors using
>>>
>
>>>
>
>>>
>
>>>
>
>>>> WrapperSimpleApp) that appear to be related to the classpath. It looks
>>>
>
>>>
>
>>>
>
>>>
>
>>>> like the problem results from the fact that I have to include all of
>>>
>
>>>
>
>>>
>
>>>
>
>>>> the jars needed for startup and shutdown. So I was curious if there is
>>>
>
>>>
>
>>>
>
>>>
>
>>>> a way to specify some jars in the classpath to be used for start and
>>>
>
>>>
>
>>>
>
>>>
>
>>>> others to be used for stop. 
>>>
>
>>>
>
>
>
>
>
>
>
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