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Phase 2 - Pre-initialisation

Opposite are the links to the routines used to demonstrate some of the benefits of pre-initialisation of the LE environment.

The technique used here is not the same as that used in the SHARE presentation which influenced the production of this material.

The implication of the sample REXX snippet in the SHARE presentation is that program ASMPIPI built its own REXX environment so that it could pass variables back to REXX for use by ASMPIPIC.

Here the Assembler program takes different paths depending upon three values in a pre-defined REXX variable.

Phase 2 - Demonstrating pre-initialisation

Below are the links to the three elements used to exploit pre-initialisation.

• The REXX routine used as the driver.
  
  The REXX routine simply uses LINKPGM to invoke the program ASMPIPI once to build the LE enclave. It then invokes ASMPIPI multiple times to execute the same COBOL program as in Phase 1, before executing ASMPIPI one last time to close the LE enclave.
  
  
• The Assembler program invoked from REXX
  
  This is effectively middleware which builds an LE enclave, executes a COBOL program, and terminates the LE enclave, all based on a parameter passed to it.
  
  
• The Job Control Language (JCL) used for the test.
  
  Batch jobs were used for all test runs to aid debugging as and when necessary.