Re: Free Java objects in RPG

[Barbara Morris <bmorris@xxxxxxxxxx>]

Giuseppe Costagliola wrote:
> 
> Hi,
> 
>  I'm a little confused about freeing java objects created within RPG.
> 
>  Rpg ref v5r2 says that if we code:
> 
> >  string = createString(myString);
> >  string = trimString(string);
> 
>  we actually have 2 java objects to free and suggests how to correct the
> code.
> 
> However suppose we have coded something like this:
> 
> >  for i = 1 to 100;
> >    string = createString(myString);
> >    newObject = someMethod(string);
> >    . . . .
> >  endfor;
> 
>  At the end of the loop:
> 
> > FreeLocalRef(String);
> > FreeLocalRef(newObject);
> 
>  should be enough ?
> 
>  Or we have 200 objects to free ?

You have 200 objects to free, but you only have the ability to free 2 of
them.  But it turns out there's a much easier way to free your objects. 
Look here http://faq.midrange.com/data/cache/282.html for the source for
an RPG module that will allow you to free many objects at once, even if
you haven't got the ability to free them individually.

In your case, you would code this:

| D env            s         *
|  /free
|   env = getJniEnv();  
|   beginObjGroup (env : 10000);  // guess the maximum number of objects
you 
                                  // would ever need in this loop
    for i = 1 to 100;
      string = createString(myString);
      newObject = someMethod(string);
     . . . .
    endfor;
|   endObjGroup (env);