Calling zRule Execution Server for z/OS from a batch application

You can execute rulesets on zRule Execution Server for z/OS from a z/OS® application (COBOL or PL/I application) that runs as a batch application.

Before you begin

In the ++HBRWORKDS++.SHBRPARM(HBRBATCH) data set member, verify that the HBRSSIDLIST variable specifies the server group where the ruleset is to execute.

The value of HBRSSIDLIST is set when you run the HBRUUPTI job in Step 5: Creating the working datasets.

Procedure

  1. Add zRule Execution Server for z/OS API calls to your application.
  2. Include the zRule Execution Server for z/OS API code either statically or dynamically to resolve the API calls.
  3. In the JCL to run your application, add the following HBRENVPR DD statement to point to the HBRBATCH dataset member: 
    //HBRENVPR DD DISP=SHR,DSN=++HBRWORKDS++.SHBRPARM(HBRBATCH)
    For a COBOL example, see the ++HBRWORKDS++.SHBRJCL(HBRMINB) dataset member, which contains the JCL used to run the COBOL Miniloan sample application.
    Note: Alternatively, you can use HBRMINBM instead of HBRMINB. The HBRMINBM sample is a version of the COBOL Miniloan sample that is designed to illustrate just the means of calling Operational Decision Manager from COBOL, without the additional complexities of reading in sample data.

    For a PL/I example, see the ++HBRWORKDS++.SHBRJCL(HBRMINBP) data set member, which contains the JCL used to run the PL/I Miniloan sample application.