RE: [Wrapper-user] RE: JNI on Win 2000

[Lakshmanan R. <LRa...@Pr...>]

Hi,

The First output is when I run the application as service and the second
output is when I run it as a stand alone program.  In both the instances , I
run it integrated with java wrapper.

The JNI is written in c++ and the exact code is 

		return (*env)->NewStringUTF(env, pTransferStr);

	where pTransferStr is defined as 'unsigned char pTransferStr[362];'

Thanks for the quick reply
Lakshmanan

-----Original Message-----
From: Leif Mortenson [mailto:le...@ta...]
Sent: Friday, February 20, 2004 7:02 AM
To: wra...@li...
Subject: Re: [Wrapper-user] RE: JNI on Win 2000


Lakshmanan,
Thanks for the output.  But I am afraid this does not really help me to 
narrow down
the problem.   You say that the string is being obtained from a call 
your your JNI
library correct?   What is the native call returning.  Is it a String 
object, a byte[],
or a char[]?

Could you describe in more detail the differences between the two 
programs below?
The first one says, when run as a DLL.   What are you referring to?   Is 
this the case
that your native code is being run as a JNI library being accessed by Java?

What about the second where you say running as a stand alone program?   
Is this
referring to a standalone C program?  Or are you still referring to a 
Java / JNI
configuration?

I want to confirm that you have this working in a Java program that has 
not yet
integrated with the Java Service Wrapper?  I need this kind of info to 
be able to
help you narrow down the problem.

If it is working in a standalone Java program but not working in the 
same program
running under the Wrapper then we need to narrow down at which point things
are breaking down for you.  The text appears to be quite simple standard 
ASCII.
I work with various double byte Japanese encodings all the time and the 
console
logging features all work flawlessly.  My current thinking is that this 
is a problem
actually getting the string from JNI into the JVM.  That is why I am 
interested in
exactly how you are doing that.   Code fragments may be helpful in 
explaining
things.

Cheers,
Leif


Lakshmanan Ramakrishnan wrote:

>Hi,
>
>	When i run it as a dll this is the output that is recorded
>
>[19 Feb 2004 14:49:06,578 DEBUG] IOL class
>com.pa.iol.rating.quote.ULCRatingHelper:String from CADB
>:???????????????????????????@???K??@???K?????????@@@@@@@@@@@@@@@@@@@??????@
@
>@@@????@@@???K??@???????@@@@@@@@@@@???????@?????K??@@?????K????????????????
?
>????@?????K??@?????K??@@?????K??@@?????K???@?????K??@?????K???@?????K??@@??
?
>??K??@???K??@???K??@@@???????@???????????@?????K??????@?????K????????@@@@@@
@
>@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
>
>When i run it a standalone program this is the output i get from the dll
>
>[19 Feb 2004 14:54:02,734 DEBUG] IOL class
>com.pa.iol.rating.quote.ULCRatingHelper:String from CADB
>:VLSNBA0257N20040927WA200004 000.00 000.001000CSL                   500CSL
>0500   000.00 0000000           0000000 00000.00
>00000.00WAT3TKLGH600100117X 00406.17 00128.33  00000.00  00000.00X 00016.50
>00000.00X 00006.17  00000.00 000.00 000.00   0000000 00000000000
>00000.000000 00000.00INTRT3                       GRSUCCESSFUL CALL
>COMPLETED               
>
>What could be wrong?
>
>Thanks in advance
>Lakshmanan
>
>-----Original Message-----
>From: Lakshmanan Ramakrishnan
>[mailto:LRa...@Pr...]
>Sent: Friday, January 30, 2004 9:34 AM
>To: wra...@li...
>Subject: [Wrapper-user] RE: JNI on Win 2000
>
>
>Hi,
>
>	I will send a detailed output tomm.
>
>Thanks,
>Lakshmanan
>
>
>
>By: mortenson ( Leif Mortenson ) 
> RE: JNI on Win 2000   
>2004-01-28 18:13  
>
> Lakshman,
>I am not aware of any such problems with the Wrapper. The Wrapper itself
>makes use of JNI calls and I have not seen any string related problems on
my
>2k system. What does the string contain? Are they standard characters or
>extended?
>
>How are you returning the string to the JVM? I always use byte arrays and
>then decode them into strings in the JVM. It makes it much easier to deal
>with various character sets.
>
>I can't think of any reason why the app would work standalone but fail
under
>the wrapper however.
>
>What is the thread that you are referring to?
>
>Is the JNI library something that you developed? Would it be possible to
add
>some debug output to it just before returning the string to the JVM?
>
>Rereading your post, you say that it works when running in a console. This
>is under the Wrapper correct. But it is failing when running as a service.
>When run as a service, the Wrapper is run using the SYSTEM user. Is it
>possible that there are some environment differences between the user
>running the console version vs the SYSTEM user?
>
>By the way, could we move this over to the wrapper-user mailing list? The
>posts are more visible and others may have some useful feedback.
>
>Cheers,
>Leif  
>  
>



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