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Status Delivered
Workspace IBM Rational Business Developer
Categories EGL Language
Created by Guest
Created on Dec 14, 2009

RELATED IDEAS

Fast access to global constants in COBOL

The only way we know to define global constants in EGL is by defining public, i.e. non-private, consts in a library. We are concerned that this does not perform well in COBOL since constants defined in EGL libraries are translated to a COBOL external method invocation.
Access to global variables should be cheap, both in COBOL and Java.
We are satisfied with libraries as a container for constants and would be reluctant to change from libraries to another vehicle. It should take no longer to access a global constant in an EGL library than it does a global constant in a native COBOL program.

Idea priority Medium
  • Guest
    Reply
    |     Sep 14, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Programming Languages
    Product - Business Developer

    For recording keeping, the previous attributes were:
    Brand - Rational
    Product family - Design & development
    Product - Business Developer

  • Guest
    Reply
    |     Mar 24, 2010

    The following solution is implemented in 7.1.0.4 and 7.5.1.4:

    If a library variable is defined with CONST, then a flag (and logic) is added to the variable in the programs that access it (the non-library ones). The accessing of the variable on the 1st time will still cause the external method invocation, but from that point on (2nd through N accesses in that same program), the flag will indicate that the value has already been obtained, and will simply cause the code to reuse the previously-obtained value.

    We still need to call the library on the 1st occurrence, because we need to get its value.

    This implementation gives good performance when a constant is used repeatedly, but still preserves the ability to change the constant value in the library without requiring regeneration of every program that uses the constant.

    If this implementation is not enough to meet your requirements, please open another RFE.

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