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  1.  Home
  2. JAVA400-L
  3. March 2004

RE: Mixed RPG/Java performance (EXAMPLE CODE)

Dieter,

That is also down to design to handle that

Cheers
Colin.W

-----Original Message-----
From: Dieter Bender [mailto:dieter.bender@xxxxxxxxxxxx] 
Sent: 12 March 2004 14:09
To: Java Programming on and around the iSeries / AS400
Subject: Re: Mixed RPG/Java performance (EXAMPLE CODE)


Colins,

that might cause problems, if the programm does not get closed (exception
for 
example or coding error). The server Jobs get receycled and another job
might 
get unpredictable results.

Dieter

On Freitag, 12. März 2004 14:32, Colin Williams wrote:
> Nigel,
>
> One answer to this is to call your RPG from java as a stored 
> procedure, and just pass a parameter to indicate when you want to do a 
> close, just as you would from RPG.
>
> I believe that you should be able to achieve this without registering 
> the RPG as a stored proedure, as long as you keep your as400 server 
> job open between calls, and pass it the relevant parameter.
>
> Cheers
> Colin.W
>
> -----Original Message-----
> From: NGay@xxxxxxxxxxxxx [mailto:NGay@xxxxxxxxxxxxx]
> Sent: 12 March 2004 12:22
> To: Java Programming on and around the iSeries / AS400
> Subject: RE: Mixed RPG/Java performance (EXAMPLE CODE)
>
>
>
> Joe,
>
> What about when the RPG has a few tables to open up and access?  If 
> you called the same RPG program say 100 times, and the RPG program 
> accessed say 5 DB2/400 tables, wouldn't it re-open those tables on 
> every call?  With an RPG program calling another RPG program you can 
> get it to keep the tables open so you don't have this overhead each 
> time but when calling from Java isn't a totally new RPG environment on 
> each call and so there'd be a huge overhead every time of opening up 
> all the tables?  This is the kind of thing which worries me about 
> calling RPG from Java - not the speed of the program call itself.
>
> Thanks,
>
> Nigel Gay.
>
> |---------+------------------------------>
> |
> |         |           "Joe Pluta"        |
> |         |           <joepluta@plutabrot|
> |         |           hers.com>          |
> |         |           Sent by:           |
> |         |           java400-l-bounces@m|
> |         |           idrange.com        |
> |         |
> |         |
> |         |           11/03/2004 13:27   |
> |         |           Please respond to  |
> |         |           Java Programming on|
> |         |           and around the     |
> |         |           iSeries / AS400    |
> |
> |---------+------------------------------>
> |
> >---------------------------------------------------------------------
> >-----
> >-
>
> -----------------------------------|
>
>   |       To:       "'Java Programming on and around the iSeries / AS400'"
>
> <java400-l@xxxxxxxxxxxx>              |
>
>   |       cc:
>   |
>   |       Subject:  RE: Mixed RPG/Java performance (EXAMPLE CODE)
> >
> >---------------------------------------------------------------------
> >-----
> >-
>
> -----------------------------------|
>
> > You have a problem.  I can call a program hundreds of times a 
> > second, and that's from my PC to my little model 270.  I included 
> > the RPG program, the Java program and the results at the end of this 
> > post.
>
> CODE FOR EXAMPLE:
>
> Program SB0001 in library SANDBOX
>
> d xidata          ds
> d   counter                      5  0
> d xwcount         s              5  0
>
> C     *entry        plist
> C                   parm                    xidata            5
> C
> C                   eval      xwcount = xwcount + 1
> C                   eval      counter = xwcount
> C                   return
>
>
> Java class CallSB0001
>
> public class CallSB0001 {
>
>              private static AS400Text at5 = new AS400Text(5);
>
>              public static void main(String[] args)
>                          throws Exception
>              {
>                          AS400 sys = new AS400();
>
>                          ProgramCall pc = new ProgramCall(
>              new AS400(),
>                                      "/QSYS.LIB/SANDBOX.LIB/SB0001.PGM",
>                                      new ProgramParameter[] {
>                                                  new ProgramParameter(5)
>                                      });
>
>                          SimpleDateFormat sdf = new 
> SimpleDateFormat("hh:mm:ss.SSS");
>
>                          for (int x = 0; x < 100; x++)
>                          {
>                                      pc.run();
>                                      String data = (String)
>
> at5.toObject(pc.getParameterList()[0].getOutputData());
>                                      String date = sdf.format(new Date());
>                                      System.out.println(date + " " +
data);
>                          }
>
>                          sys.disconnectAllServices();
>                          System.exit(0);
>              }
> }
>
>
> Selected Results:
>
> 10:32:24.938 00001
> 10:32:24.938 00002
> 10:32:24.938 00003
>
> 10:32:25.016 00049
> 10:32:25.016 00050
> 10:32:25.016 00051
>
> 10:32:25.125 00098
> 10:32:25.125 00099
> 10:32:25.125 00100
>
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>
>
>
>
>
>
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-- 
mfG

Dieter Bender


DV-Beratung Dieter Bender
Wetzlarerstr. 25
35435 Wettenberg
Tel. +49 641 9805855
Fax +49 641 9805856
www.bender-dv.de
eMail dieter.bender@xxxxxxxxxxxx

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This message, and any attachments, are intended solely for the addressee and 
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If you believe that you have received this email in error, please contact the 
sender immediately. Opinions, conclusions and statements of intent in this 
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unless confirmed in writing by a director independently of this message. 
Although we have taken steps to ensure that this email and any attachments are 
free from any virus, we advise that in keeping with good computing practice the 
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