java to rpg problem

["Jon Paris" <Jon.Paris@xxxxxxxxxxxxxx>]

 >> On the iSeries it would attempt to load a *PGM or *SRVPGM. However, even
then the program would have to be written to the JNI standard, which means
C.  You could write JNI "wrappers" in C that in turn call your RPG.

The phrase "which means C" is not correct as of V5R1 (in fact it was not
correct as of V4R5 but it was just plain ugly to do).  To make an RPG
subprocedure meet the JNI standard simply requires adding the keyword
information EXTPROC(*Java : 'ClassName' : 'MethodName' ) on the prototype.
Works beautifully and the compiler does all the work for you!  *PGM is not
an option though as far as I know - it has to be a service program.

If you wish the same subproc to be callable from RPG then  you simply write
a wrapper that use uses the above keywords around the "standard" RPG
version.

Couldn't get much easier and no nasty C to worry about!

Jon Paris
Partner400