Tailoring for Performance › Construct Resolution in Code › Selecting the Proper User Points

Selecting the Proper User Points

When you need to add functionality to an action diagram, study the appropriate function structure chart and information on user points and select the user point to execute at the correct time for your needs.

Using the incorrect user point in an action diagram can make the repetition of code at another user point unnecessary.

Assume the following:

• An EDTFIL is required to maintain Customers
• Customers who have a negative balance need to be highlighted when the EDTFIL presents Customer records to the user
• The WRK context field HIghlight Customer is used to indicate that the Customer record should be highlighted

In order for the appropriate Customer records to be highlighted when the records are initially loaded, the following processing could be placed in the USER: Initialize subfile record (existing record) user point:

  .  > USER: Initialize subfile record ( existing record)
  . .—
  . . WRK.Highlight Customer = CND.No
  . . .-CASE
  . . | -RCD.Customer balance is LT 0
  . . |  WRK.Highlight Customer = CND.Yes
  . . '-ENDCASE
  . '—

To further ensure that the records continue to be highlighted after the records are loaded, the same processing would also need to be inserted in the USER: Validate subfile record fields user point.

The duplication of logic in both these user points can be avoided by placing the processing in the USER: Validate subfile record relations user point. This user point is executed both at function load and later when the records are revalidated.

The selection of this user point reduces the amount of code generated thereby improving the efficiency of the resulting program.