Re: Call Java program from RPGLE

[David Gibbs <david@xxxxxxxxxxxx>]

Thorbjørn Ravn Andersen wrote:
> As a curious byseer, is there any who have worked with this who can say 
> how well it works in terms of speed, maintainability (how fragile is 
> this?) and general usefulness?

I've used it, but don't recommend it.

The cost of starting up a JVM is very high.  Plus only one JVM can be 
started per job ... and I think there are significant issues if you need 
a different classpath used (not 100% sure about that though).

Personally, I prefer to run a server in a batch subsystem (or on a PC) 
that stands ready to answer requests sent to it via a data queue.

I've got a really nice system setup that uses externally described data 
structures, keyed data queues, and the RecordFormat object in JT400, to 
pass structured bulk information between RPG programs and Java code.

david