Re: How to set up Library list for servlet on AS400?

["Frances Stewart" <francess@xxxxxxxxxx>]

I believe you can specify more than by separating the entries with a colon
(:) much like the Java classpath. E.g.
-Djava.library/path=/QSYS.LIB/FSTEWART.LIB:/QSYS.LIB/MYAPP.LIB

Also, this property can only be used in WebSphere Application Server v3.5
and higher since the property did not exist prior to JDK 1.2. So if you are
using v3.0.2.x, it will not work.

Frances Stewart
WebSphere Application Server for iSeries 400
IBM Rochester


mandy.shaw@uk.catalyst-solutions.com@midrange.com on 03/13/2001 05:46:20 PM

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Subject:  Re: How to set up Library list for servlet on AS400?



Frances,
I need my library list set so that when I run stored procedures they pick
up the right library list (with about 22 libraries in, representing a
complicated BPCS environment). Will the technique suggested help with this,
or can you only specify one library with it?
Thanks a lot for all your help.
Mandy





"Bruce Jin" <brucej@MRC-PRODUCTIVITY.COM> on 13/03/2001 21:35:27

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To:   JAVA400-L@midrange.com
cc:    (bcc: Mandy Shaw/Pacific/UK)
Subject:  Re: How to set up Library list for servlet on AS400?




Yes, I just tried and it has not worked yet. I need to look into it more.
(I am on WAS 2 and Jai also had instructions for WAS 2)
Bruce


-----Original Message-----
From: Frances Stewart <francess@us.ibm.com>
To: JAVA400-L@midrange.com <JAVA400-L@midrange.com>
Date: Tuesday, March 13, 2001 1:59 PM
Subject: Re: How to set up Library list for servlet on AS400?


>
>Have you tried this method (Jai Goradia posted it to the WebSphere
>Application Server for iSeries newsgroup earlier in responce to Bruce's
>question):
>
>Bruce,
>        Here is what i would do. In the admin console find and click on
>your
>application server in the topology view.  On the general tab for the
>application server you will see a field where you can specify command line
>arguments for the Java Virtual Machine that will be created for use by the
>Application server. It is typically prefilled with a value for the java
>minimum heap size namely an entry like -ms32m. This field allows you to
>specify system properties for the JVM. add a property called
>java.library.path in there. So you would enter
>-Djava.library.path=/QSYS.LIB/MYLIB.LIB after separating the previous
value
>in that field with a space in between(ie. -ms32m
>-Djava.library.path=/QSYS.LIB/MYLIB.LIB).  This tells the JVM in the
>application server executing  the servlets where to look for the service
>programs that the servlet code references after doing a loadLibrary() in a
>static section in the code to load the service program native code into
>memory.  Once you add this property to the command line arguments you will
>need to restart the application server for it to take effect.  Try that.
>
>
>Frances Stewart
>WebSphere Application Server for iSeries 400
>IBM Rochester
>
>
>mandy.shaw@uk.catalyst-solutions.com@midrange.com on 03/13/2001 12:10:15
PM
>
>Please respond to JAVA400-L@midrange.com
>
>Sent by:  owner-java400-l@midrange.com
>
>
>To:   JAVA400-L@midrange.com
>cc:
>Subject:  Re: How to set up Library list for servlet on AS400?
>
>
>
>I should be very interested in the answer to this one also - the only way
I
>have come up with is using the WAS Admin Console to tell the WAS Web
>Application Server to run under a specific user profile that has the right
>library list on its job description. This also required me to go into the
>Ops Nav Application Admin thing to tell WAS that this user profile was
>allowed to be used for this purpose. I never actually finished testing
this
>so I don't even know whether it would have worked.
>Incidentally, when you compare performance with a Toolbox call, it would
be
>interesting to know whether you'd optimised the Toolbox to level 40 before
>the test or not.
>Mandy
>
>
>
>
>
>"Bruce Jin" <brucej@MRC-PRODUCTIVITY.COM> on 13/03/2001 17:26:17
>
>Please respond to JAVA400-L@midrange.com
>
>To:   JAVA400-L@midrange.com
>cc:    (bcc: Mandy Shaw/Pacific/UK)
>Subject:  Re: How to set up Library list for servlet on AS400?
>
>
>
>
>
>Hi Jim.
>
>Thanks for the response!
>I can now call JNI to RPG in Qshell or RUNJVA using java.library.path
>property.
>
>I found it is interesting that I can also add MYLIB to my library list
>before using RUNJVA or going to Qshell so that I don't have to use
>java.library.path property.
>
>Now my question is: I use JNI to call RPG in servlets which are invoked by
>WebSphere. How do I add MYLIB to the "library path" of the servlets or
>WebSphere?
>
>(BTW, it appears that JNI call is a lot faster than Toolbox program call
in
>Qshell or RUNJVA)
>
>TIA
>Bruce
>
>
>-----Original Message-----
>From: Jim Mason <JEMason@compuserve.com>
>To: INTERNET:JAVA400-L@midrange.com <JAVA400-L@midrange.com>
>Date: Tuesday, March 13, 2001 10:53 AM
>Subject: How to set up Library list for servlet on AS400?
>
>
>
>Hi Bruce.
>
>For JNI, a good way to specify the library list for an RPG program is:
>
>supply the list in the java.library.path property.
>You can modify the java.library.path property in QShell and from the
AS/400
>command line.
>
>From the Qshell command prompt, type in:
>java -Deja.library.path=/QSYS.LIB/MYLIB.LIB -Djava.version=1.2 myclass
>
>Or, from the AS/400 command line, type in:
>JAVA PROP((java.library.path '/QSYS.LIB/MYLIB.LIB') (java.version '1.2'))
>myclass
>
>Where /QSYS.LIB/MYLIB.LIB is the library that you wish to load using the
>'System.loadLibrary()' call,
>and myclass is the name of your Java application.
>
>see the AS/400 Java manual:
>AS/400 Developer Kit for Java for more on JNI...
>
>Other options than JNI to call RPG programs from Java include:
>1  JDBC stored procedures
>2  Java toolkit program call class
>3  Runtime.exec()
>
>JNI is very good if you need to call specific procedures in an ILE service
>program.  If you write RPG ILE service programs, you can call specific
>procedures nicely.  Any of the other methods are easier to do than JNI BUT
>only can call a program ( not a specific procedure ) passing parms and
>receiving updated parms back.
>
>JDBC stored procedures are excellent IF your RPG program should do some
>complex processing and return a simple result set of rows for a client
Java
>application to process....
>
>Hope this helps...
>
>Jim Mason
>
>
>Message text written by INTERNET:JAVA400-L@midrange.com
>>
>I am trying to use JNI to call RPG programs in servlet. I put the RPG
>service program in library MYLIB. How do I include MYLIB in the "library
>path" of the servlet so that servlets can find the service program?
>
>TIA.
>
>Bruce
><
>
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>      Regards,
>      Mandy Shaw
>
>      Catalyst Solutions plc
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      Regards,
      Mandy Shaw

      Catalyst Solutions plc
      Kingfisher House
      Frimley Business Park
      Camberley
      Surrey
      GU16 5SG
      UK

      http://www.catalyst-solutions.com
      Email: Mandy.Shaw@uk.catalyst-solutions.com

      Telephone: +44 (0)870 166 1000
      DDI: +44 870 166 1324
      Facsimile: +44 870 168 3920
      Mobile: +44 410 447966





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Catalyst Solutions plc.  Registered No 2918101.
Registered @ Kingfisher House, Frimley Business Park, Frimley,
Surrey. GU16 5SG   U.K.

NOTICE:
This message is intended only for the named addressee(s) and may
contain confidential and/or privileged information. If you are not the
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and any attachments accompanying it immediately.
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