RE: Call a Java program from RPG or CL

Kelly Jones wrote:

 
We have a situation where we need to call a Java program, have it do
"it's thing", then pass a return code back to the calling program.  The
main point of the return code is to inform the calling program whether
everything went OK.  If the Java program bombs, we need to inform the
caller that something bad happened and stop.
 
Can someone provide an example how to do this?

When we need to do this, we create a Java Stored Procedure. The procedure can 
define the input and output parameters like this:

CREATE PROCEDURE Libray.ProcName ( 
        IN SomeVariable VARCHAR(25) , 
        OUT ErrorCode Integer ) 
        LANGUAGE JAVA 
        NOT DETERMINISTIC 
        MODIFIES SQL DATA 
        EXTERNAL NAME 'com.yourcompany.ClassName!methodName' 
        PARAMETER STYLE JAVA ; 

Your class goes in the /UserData/OS400/SQLLib/Function/ directory or is 
available through the classpath.

Then your CL or RPG (or whatever) can call the stored procedure in a SQL 
statement just like it would any other stored procedure.

This works well for us. The Java program can catch exceptions or handle 
different types of problems and return an appropriate error code. We always 
return 0 if there were no problems.
**************************************************************************************************
The contents of this email and any attachments are confidential.
They are intended for the named recipient(s) only.
If you have received this email in error please notify the system manager or  
the 
sender immediately and do not disclose the contents to anyone or make copies.

** eSafe scanned this email for viruses, vandals and malicious content. **
**************************************************************************************************