RE: Calling Java from RPG take 2

Hooray, it works. Amazingly, it worked the first time after I got it compiled successfully. Basically, my code consists of 4 lines.

jTokenKey = makeString(KeyV);
jTokenExpireMinutes = 2;
TokenRet = getUniversalToken( jTokenKey : jTokenExpireMinutes);
Token = getBytes(TokenRet);

Do I need to worry about garbage collection if the process is called multiple times within a job or is that handled for me? From what I understand, a new string object would be created each time the program is called. Should I set on LR each time it is called or doesn't that make any difference other than from a performance standpoint?

Dean Eshleman,
Everence Financial

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Barbara Morris
Sent: Wednesday, September 19, 2012 7:10 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Calling Java from RPG take 2

On 2012/9/19 4:47 PM, Dean Eshleman wrote:

String tokenValue = cincom.eloquence.exits.gsm.token. UniversalToken.
getUniversalToken(Mykey, expireMinutes)
...
What I am struggling with is how do I move data between a Java string
variable and an RPG character variable?

You'd use the String constructor to create a Java string from an RPG
character variable, and you'd use the getBytes method from the Java
String class to get the Java string data into an RPG character variable.

The RPG/Java trouble-shooting guide http://ibm.biz/BdxjTE, in the RPG
Cafe, has the code for a program JAVAPROP that has something very
similar to what you would be doing.

It's calling Java method
String System.getProperty (String);
so it has to build the String parameter, and then get the value back
from the returned value.

beginObjGroup (env : 100);
str = newString (prop);
str = getProperty (str);
if str = *null;
result = 'That property was not found';
else;
result = getBytes (str);
endif;
endObjGroup (env);

The RPG Cafe also has a savefile with source for the JNI utilities in
the ILE RPG Programmer's Guide, to make it easy to call JNI functions
like BeginObjGroup and endObjGroup which are essential for enabling Java
garbage collection. Find the article called "JNI utilities from the RPG
Programmer's Guide" in the left-hand navigation of the wiki that you'll
get to from the trouble-shooting link.