RE: AS400 Toolbox problems - ServiceProgramCall -- JAVA400-L

CL,

Strange - I'm sure I'd tried passing by reference before, and it hadn't
worked. However I made the changes as you specified, and it worked. Guess I
must had had something else wrong originally.

I worked out why the return value doesn't come out by running it in debug -
It was only declared as a short (5I) in the rpg. I changed it to int (10I)
and changed the converter to an AS400Bin4 and it worked fine.

Thanks for your help (and everybody else's...)

I'm not sure I'm going to persevere with the ServiceProgramCall class. The
restrictions on the number & types of parameter supported mean that very few
of our existing RPG procedures could be called. Are there any plans to
enhance this further, or is this as good as it gets? Is the problem in the
underlying API?


Chris.

-----Original Message-----
From: Chanh_Le@countrywide.com [mailto:Chanh_Le@countrywide.com]
Sent: 22 August 2001 16:58
To: java400-l@midrange.com
Subject: RE: AS400 Toolbox problems - ServiceProgramCall




1/ I remove the keyword "Value" of the parameter "String" in the service
program.
2/ Change the parameter property ProgramParameter.PASS_BY_VALUE to
ProgramParameter.PASS_BY_REFERENCE
3/ The service program runs fine.


However the class Temp can not receive the correct returned value - it only
displays either -1 or 0.  I do not know where to download the redbook to
set the service program to accept the returned value.  In Dave sample, it
sets for ServiceProgramCall.NO_RETURN_VALUE.  In the Temp class, the
parameter property is not setup.

sPGMCall =  new ServiceProgramCall(system,"/QSYS.LIB/QTOCNETSTS.SRVPGM",
"QtocLstNetIfc",
ServiceProgramCall.NO_RETURN_VALUE,parms);


CL






"Price, Chris" <chris_price@nsb.co.uk>@midrange.com on 08/22/2001 03:12:36
AM

Please respond to java400-l@midrange.com

Sent by:  java400-l-admin@midrange.com


To:   "'java400-l@midrange.com'" <java400-l@midrange.com>
cc:

Subject:  RE: AS400 Toolbox problems - ServiceProgramCall


Dave,

No - due to time pressures I couldn't wait for answers, so I've converted
my
service program call to a regular program call. This is not a long-term
solution however, as we cannot create program objects for every RPG
procedure, just so they can be called by Java clients.

As I said in my original post, I couldn't get passing by reference to work
either (this was my first choice!)

It would helpful if restrictions like "ServiceProgramCall supports pass by
value only for integer values" was mentioned in the toolbox documentation.

In general I have found the toolbox documentation for ProgramCall &
ServiceProgramCall to be very poor - none of the "examples" will compile,
and even if they did, cannot be run on anyold AS400, as the example
programs
are not shipped in the ADTSLAB library, as they are for other examples in
the toolbox.

Soldiering on...

Chris.

-----Original Message-----
From: Dave Wall [mailto:dawall@us.ibm.com]
Sent: 21 August 2001 17:05
To: 'JAVA400-L@midrange.com'
Subject: RE: AS400 Toolbox problems - ServiceProgramCall


Chris, were you able to get your example working?  My RPG contacts finally
returned by note and they were able to get your example to work by changing
your RPG code to say the character parameter is pass by reference.

It turns out that Toolbox ServiceProgramCall supports pass by value only
for integer values.  I found out that with RPG, large structures / strings
can be pass by value.  These parameters will not work through the Toolbox
object.  They must be changed to be pass by reference.

David Wall
AS/400 Toolbox for Java

----- Forwarded by Dave Wall/Rochester/IBM on 08/14/2001 03:18 PM -----

                    "Price, Chris"
                    <chris_price@nsb.c       To:
"'JAVA400-L@midrange.com'" <JAVA400-L@midrange.com>
                    o.uk>                    cc:
                    Sent by:                 Subject:     RE: AS400 Toolbox
problems - ServiceProgramCall
                    owner-java400-l@mi
                    drange.com


                    08/14/2001 10:18
                    AM
                    Please respond to
                    JAVA400-L





Thanks for your example.

Unfortunately it didn't work on my system as we don't seem to have a
QTOCNETSTS service program.

I'm trying to call my own service program, written in RPG IV.
The Java class sets the String input parameter to a test value, and calls
the procedure. The procedure compares the passed in string to a value, and
if the same returns 99, otherwise returns -1. If written as a service
program, the return value is always -1. Yet if I convert the service
program
into a program, making the nessesscary changes to the class, the return
value is 99.


Here's a sample of my Java & RPG code:


public class Temp
{
public static void main(String[] parameters) {

    AS400 as400 = new AS400();

    QSYSObjectPathName sprogramName =
        new QSYSObjectPathName("R1005DVOBJ", "CJPTEST", "SRVPGM");

    ServiceProgramCall spgm = new ServiceProgramCall(as400);

    //Service Program Call
    try {
        // One Parameter - String in. Returns short

        ProgramParameter[] parmlist = new ProgramParameter[1];

        AS400Text text1 = new AS400Text(10, as400);
        byte[] text = text1.toBytes("CHRISPRICE");
//        parmlist[0] = new ProgramParameter(text);
        parmlist[0] = new ProgramParameter();
        parmlist[0].setInputData(text);
        parmlist[0].setParameterType(ProgramParameter.PASS_BY_VALUE);

        //run the serivce program
        spgm.setProgram(sprogramName.getPath(), parmlist);
        spgm.setProcedureName("CJPTEST_PROC");
        if (spgm.run() != true) {
            AS400Message[] msgList = spgm.getMessageList();
            System.out.println("The program did not run.  AS/400
messages:");
            for (int i = 0; i < msgList.length; i++) {
                System.out.println(msgList[i].getText());
            }
        } else {
            AS400Bin2 as400Int = new AS400Bin2();
            byte[] as400Data = spgm.getReturnValue();
            short result = as400Int.toShort(as400Data, 0);
            System.out.println("Service Program Call Result is : " +
result);

        }

    } catch (Exception e) {
        System.out.println("Service Program call failed");
        System.out.println(e);
    }

    System.exit(0);
}
}

The very simple RPG module:
D CJPTEST_PROC    PR             5I 0
D  String                       10     Value

P CJPTEST_PROC    B                    Export
D                 PI             5I 0
D String                        10     Value
C                   If        String = 'CHRISPRICE'
C                   Return    99
C                   Else
C                   Return    -1
C                   Endif

-----Original Message-----
From: Dave Wall [mailto:dawall@us.ibm.com]
Sent: 14 August 2001 15:45
To: JAVA400-L@midrange.com
Subject: Re: AS400 Toolbox problems - ServiceProgramCall



Here is code to call entry point QtocLstNetIfc in service program
QTOCNETSTS.  The entry point takes three parameters -- two strings (passed
by reference) and the error code.  The strings are converted from Unicode
to EBCDIC before being sent to the server.  When calling programs or
service programs, pay particular attention to lengths.  The Toolbox client
passes data to the program call server who dumps the data in one big
buffer.  It then passes pointers to that buffer or pulls data out of the
buffer when calling the service program.  If a length is off the wrong data
will be passed, but since all data comes out of one big buffer you may not
get a addressing errors (trying to get to memory you don't own).  You will
just get bad data.

Are you trying to call an OS/400 service program or one of your own?  Some
Toolbox objects are implemented by calling OS/400 service programs via
ServiceProgramCall so I know it can work.

        AS400 system = new AS400();

        // The first parm is 20 characters, 10 chars of user space followed
by 10 chars of library.
        // Create a converter for 20 chars.
        AS400Text char20 = new AS400Text(20, system);

        // The second parm is the format name (8 chars).  Create a
converter.
        AS400Text char8  = new AS400Text(8, system);

        // Create program parameters
        ProgramParameter[] parms = new ProgramParameter[3];

        // First parm is qualified user space CHAR(20)
        //   CHAR(0-9) is the user space name
        //   CHAR(10-19) is the library name
        String qSpace = "DAW       DAW       ";

        // First parm is the library qualified UserSpace
        parms[0] = new ProgramParameter(char20.toBytes(qSpace));
        parms[0].setParameterType(ProgramParameter.PASS_BY_REFERENCE);

        // Second parm is the format
        parms[1] = new ProgramParameter(char8.toBytes("NIFC0100"));
        parms[1].setParameterType(ProgramParameter.PASS_BY_REFERENCE);

        // Last parm is the error code.  We pass an array of 0x00s so
messages are returned.
        byte[] bytes = new byte[32];
        parms[2] = new ProgramParameter(bytes, 32);
        parms[2].setParameterType(ProgramParameter.PASS_BY_REFERENCE);

        ServiceProgramCall sPGMCall = null;

        System.out.println("About to create the program");
        sPGMCall =  new ServiceProgramCall(system,
                                           "/QSYS.LIB/QTOCNETSTS.SRVPGM",
                                           "QtocLstNetIfc",

ServiceProgramCall.NO_RETURN_VALUE,
                                           parms);

        System.out.println(sPGMCall.run());

        AS400Message[] ml = sPGMCall.getMessageList();

        for (int i=0; i<ml.length; i++)
           System.out.println(ml[i].getID() + ": " + ml[i].getText());

David Wall
553-5329
AS/400 Toolbox for Java





                    "Price, Chris"

                    <chris_price@nsb.c       To:
"'java400-l@midrange.com'" <java400-l@midrange.com>
                    o.uk>                    cc:

                    Sent by:                 Subject:     AS400 Toolbox
problems - ServiceProgramCall
                    owner-java400-l@mi

                    drange.com





                    08/14/2001 05:31

                    AM

                    Please respond to

                    JAVA400-L









Has anyone successfully managed to call a procedure in a service program,
using the ServiceProgramCall class?

I'm having major problems getting this to work:

Passing by reference doesn't work at all - get null pointer errors in the
procedure.

Passing by value works for integers, but Strings get garbled. I thought
this
might be a CCSID problem, but the same code works fine for a ProgramCall.

Does anyone have any working examples using this class, there aren't any
that I can find in the toolbox documentation.

Confused,
Chris.




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