Installing Generated Clients

Prerequisites:

• iSeries 7.1 or newer (1).
• ILE C compiler.
• ILE COBOL compiler.
• HTTPApi (<https://www.scottklement.com/httpapi/>) is required Follow the link above. Download and follow installation instructions
• Compile and OLCBLAPIC.c as a service program - This will be a C interface between the COBOL client and HttpApi. This Class will be referenced by the clients we generate from CLI
  AS/400

  CRTCMOD MODULE(<some Library>/OLCBLAPIC)
  SRCSTMF('/<somePath>/OLCBLAPIC.c')

  To download the OLCBLAPIC.c, please go to OpenLegacy Download Portal, the file is under Adapters -> AS400 Reverse API. For user access, please reach out to your OpenLegacy Customer Success representative.

Integrating the Generated COBOL Client into Your Application

The generated COBOL client includes four essential components. Follow these steps to adapt and incorporate it into your program:

Key Components of the COBOL Client

1. Working Storage Section:

   • HTTP-REQUEST: Contains the parameters for invoking the remote web service.
   • HTTP-RESPONSE: Contains the response from the remote web service.
   • WS-API-CALLER-VARS: Includes the following fields:
     • WS-URL: The target remote web service URL, which may need updating with the correct endpoint.
     • WS-API-KEY: A HUB-generated API key that may need updating. (TODO: Investigate how to generate this key).
     • WS-RESULT: Holds the result of the API call, with possible response values.

2. Procedure Division:

   • Use the CALL statement to invoke the C interface.

Instructions for COBOL Developers

• Incorporate the Components: Add these sections to your COBOL program, or create a sub-program that can be called as needed.
• Program Creation: Create the program using the components as described.

Steps to Compile and Link the Program with Required Modules

1. Create the Module: Compile the COBOL program and create a module using CRTCBLMOD or CRTSQLCBLI.

2. Create the Program (PGM): Link the COBOL module with the C interface module. Use the following command, adjusting the parameters to match your libraries and program names:

   COBOL

   CRTPGM PGM(<pgm-lib>/<pgm-name>)
   MODULE(<module-lib>/<module-name> <c-intf-lib>/OLCBLAPIC <other-modules>)
   BNDSRVPGM((<http-api-lib>/HTTPAPIR4 *IMMED))

   • Parameters:
     • <pgm-lib>: Target library for the program.
     • <pgm-name>: Name of the program.
     • <module-lib>: Library where the compiled module resides.
     • <module-name>: Name of the program’s module.
     • <c-intf-lib>: Library containing the COBOL/C interface module.
     • <other-modules>: Any additional modules required by your program.
     • <http-api-lib>: Location of the HTTPApi service module. Use *LIBL if it is already in your library list.

These steps will allow COBOL developers to effectively integrate the generated client into their application, ensuring compatibility with the remote web service and C interface.