Re: [Wrapper-user] How to catch other system events

[Richard L. <ric...@ms...>]

Leif,

Thanks for your response.  Sorry my response is somewhat late, however 
this project's priority was shifted around for me.

You are correct in that Windows doesn't throw any signal for a use 
login.  What I have is a dll, that hooks onto the windows login service 
and basically sends my java thread custom signals.  My thread will then 
return an integer as a response.  At least that's the plan.

My question is, how do I reply to a system event?  I see from your code 
sample below, that your wrapperConsoleHandler returns an int.  And that 
int is true.  That method then passes it to the JVM's controlEvent 
method, which returns void.  Is there anyway that I can return my own 
custom code?  Thanks.

Richard.

> Subject:
> Re: [Wrapper-user] How to catch other system events
> From:
> Leif Mortenson <le...@ta...>
> Date:
> Thu, 08 Jan 2004 18:59:21 +0900
> To:
> wra...@li...
> 
> To:
> wra...@li...
> 
> 
> Richard,
> Sorry I never answered you did I.
> 
> The Wrapper currently catches system events in the native code,
> Wrapper.DLL. It is taking any signal except the CTRL_BREAK_EVENT, which
> is used to generate thread dumps.
> What is the actual system signal that your card is throwing? Normally
> windows does not throw any signals that I know of when a user logs in. I am
> interesting in finding out how your card works because I have been looking
> for a nice clean way of telling when a user logs on for a while. The next
> version of the Wrapper allows you to poll for this information, but there is
> no signal that I could find that is fired when a user logs on to a
> Windows system.
> 
> Here is the native code that parses the signals. Note that I am passing any
> unknown signals off to the JVM as well so the controlEvent method of your
> WrapperListener should get them if they are thrown.
> 
> ---
> int wrapperConsoleHandler(int key) {
> int event;
> 
> /* Call the control callback in the java code */
> switch(key) {
> case CTRL_C_EVENT:
> event = org_tanukisoftware_wrapper_WrapperManager_WRAPPER_CTRL_C_EVENT;
> break;
> case CTRL_BREAK_EVENT:
> /* This is a request to do a thread dump. Let the JVM handle this. */
> return FALSE;
> case CTRL_CLOSE_EVENT:
> event = org_tanukisoftware_wrapper_WrapperManager_WRAPPER_CTRL_CLOSE_EVENT;
> break;
> case CTRL_LOGOFF_EVENT:
> event = org_tanukisoftware_wrapper_WrapperManager_WRAPPER_CTRL_LOGOFF_EVENT;
> break;
> case CTRL_SHUTDOWN_EVENT:
> event =
> org_tanukisoftware_wrapper_WrapperManager_WRAPPER_CTRL_SHUTDOWN_EVENT;
> break;
> default:
> event = key;
> }
> if (wrapperJNIDebugging) {
> printf("Got Control Signal %d->%d\n", key, event);
> flushall();
> }
> 
> wrapperJNIHandleSignal(event);
> 
> if (wrapperJNIDebugging) {
> printf("Handled signal\n");
> flushall();
> }
> 
> return TRUE; /* We handled the event. */
> }
> ---
> 
> Please most back with as much info as you can make available even if you
> get this working.
> 
> Cheers,
> Leif
> 
> Richard Luong wrote:
> 
> 
>>I want to hook onto the Windows Login (Gina.dll) so that I can login
>>through an ID card. I can do the JNI stuff to talk from Java to the C
>>dll. But I would like the C code to be able to talk back to the Java
>>code through throwing events to my NT Service.
>>
>>My question is, does the Java Service Wrapper catch all events and
>>pass them on? If that's so, then problem solved.
>>
>>If not, does it only pass on specific control events such as windows
>>logoff, shutdown and ctr+C ?
>>
>>If so, can I modify the code to pass on all events? I know that I will
>>have to use Integration Method #3, which is not a problem for me.
>>However, any pointers to the code that is catching and possibly
>>ignoring/passing on events would be helpful.
>>
>>Thanks.
>>
>>_________________________________________________________________
>>Expand your wine savvy ?and get some great new recipes ?at MSN Wine.
>>http://wine.msn.com
>>
>>
>>
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> 
> 
> 
> 
> 
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