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RPG Open Access Print E-mail
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Written by Chamara Withanachchi   
RPG Open Access

What is open Access

Open Access is a full-featured version of the limited support provided by RPG SPECIAL files. It provides a way for RPG programmers to use the simple and well-understood RPG I/O model to access devices that are not directly supported by RPG.


When the HANDLER keyword is specified on a File specification, the RPG compiler will generate code to use the specified handling procedure for I/O operations to the file rather than generating code to call the system's data management functions.


The HANDLER keyword can be used for any RPG device, DISK, PRINTER, or WORKSTN. The provider of the handling procedure can choose the RPG device-type that best fits the function that the handler provides. For example, a user-interface application could map to a WORKSTN file, an Excel document could map to a PRINTER file, and a Web service could map to a keyed DISK file.


To obtain the runtime enablement for these capabilities, customers should order IBM Rational Open Access: RPG Edition (5733-OAR). Which means you have to purchase as a separate Product.


Simply RPG Open Access mean, for example, instead of doing an EXFMT to the green screen you could do it to a web browser.


What is a HANDLER

A HANDLER is the interface/method which handle the communication with the wide range of available resources and devices


Some of the Providers are (for Open Access Handlers)

IBM Lab Services

looksoftware

Profound Logic

VAI



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