RE: Help needed with RPG prototypes and POI

["John King" <jking@xxxxxxxxxxx>]

Scott,

 Many thanks, your correction to my prototype made the RPG compiler happy,
but I had to upgrade from POI-1.5 to POI-2.0 in order to make the runtime
work. I dunno, if the CLASSPATH points to POI-2.0 it works, if it points to
POI-1.5 it fails everytime.

 I'd seen and studied Kevin Vandever's series of articles before, but had
not seen Giuseppe Costagliola's excellent "Excel on the Fly" utility. I even
liberated some of his code that sets the CLASSPATH inside the RPG.

JK


> ------------------------------
>
> message: 8
> date: Thu, 6 Nov 2003 15:03:28 -0600
> from: "Scott Johnson" <sjohnson@xxxxxxxxxxxxx>
> subject: RE: Help needed with RPG prototypes and POI
>
> Your PR should be:
>
>       * // writeWB(java.io.OutputStream)
>      D writeWB         PR                  EXTPROC(*JAVA
>      D
> :'org.apache.poi.hssf.usermodel-
>      D                                     .HSSFWorkbook'
>      D                                     :'write')
>      D parm                            O   CLASS(*JAVA
>      D                                     :'java.io.OutputStream')
>
> Call it this way:
>          writeWB(wb:outFile);
>
> You do not need to prototype the first parm(wb) in the 'call'.
> It is the object
> that the writewb will operate on.
>
>
> Create a CL wrapper and call your RPG module from there:
>
>             MONMSG     MSGID(CPFA980)
>             ADDENVVAR  ENVVAR(CLASSPATH) +
>                          VALUE('/javalib/jakarta-poi-1.5.1.jar')
>
>             CALLPRC    PRC(POIMSAMP)
>
> Getting the classpath to work is very important.  If you call
> your RPG program
> interactively, your classpath/JVM is set until you sign off.  So
> it is best to
> create the cl wrapper to set the classpath and submit it to
> batch.  Took me
> quite a while before I got that worked out.  Once I did
> everything fell into
> place.
>
> Here is a different example to check out:
> http://www.mcpressonline.com/mc/1@xxxxxxxxxxxxxxxx@.6ae8269f!more=1#more
>
> One thing I found in both examples is that they do not close the
> file when they
> are done.  This can leave a lock on the excel file. Add the
> following to your
> source:
>
>       * // closeFile(java.io.OutputStream)
>      D closeFile       PR                  EXTPROC(*JAVA
>      D                                     :'java.io.FileOutputStream'
>      D                                     :'close')
>
> After the writeWB add:
>
>         // Close file
>         closeFile(outFile);
>
>
>
> Other References:
> http://www.midrangeserver.com/mpo/mpo022802-story06.html
> http://www.midrangeserver.com/mpo/mpo013102-story02.html
> http://www.midrangeserver.com/mpo/mpo041003-story01.html
> http://www.midrangeserver.com/mpo/mpo042403-story04.html
>
>
> -- Scott J.