Blog - IAP

22 Mar Design Pattern in OO ABL – Part 1 of 3

Posted at 15:36h in Software design

In a larger project design patterns help to keep the code reusable, readable, and to avoid problems in the long term. E.g. using the "Builder Pattern" allows changing and adding parameters of often used objects late in a project.
This article will describe how to implement some of the patterns in OpenEdge Object Oriented ABL – shortly named OO ABL. The chosen patterns are very common and often used. The view to the patterns is driven by daily, practical work....

18 Jan Basic OpenEdge DB Tuning Part II: BI Cluster Size

Posted at 15:28h in Database tuning

Abstract: In an OpenEdge DB the BI Cluster changes (checkpoints) are write intensive and costly. Increase BI Cluster size, so that a cluster needs 5 minutes or longer to fill up....

14 Dec Basic OpenEdge DB Tuning: -B / Cache

Posted at 14:57h in Database tuning

Tuning an OpenEdge DB on basic level requires only a few parameters to be considered. The -B is the most valuable parameter. When set to 100 000 (one hundred throusand) the DB will use 100000 times the size of a DB block as a cache. Often enough the -B parameter is not set or much too small. See the -B documentation here ...

18 May OpenEdge: Soft Migration Strategy – Transform during ongoing Maintenance

Posted at 15:39h in Migration

This article describes a strategy to migrate OpenEdge (Progress Software) applications, e.g. from CHAR UI to .NET UI, or classic OpenEdge UI to HTML5 UI. This method is known as 'Soft Migration', 'Step-by-Stop Migration' or 'Soft Transformation'. The description uses OF-1 as example, but it is not bound to OF-1, it can be used with all OpenEdge development systems. The earlier article about OpenEdge Hard Migration can be found here....

02 Mar Set up PCase for macro development

Posted at 12:00h in Updates

PCase is the leading Case Tool for OpenEdge. The user can extend PCase with macros. These macros are ABL programs, mostly used for code generation or data import and export.

PCase comes with a bunch of predefined macros, these can be used as examples.

This article describes how to join a project (OpenEdge Architect / Studio) with PCase, so that everything for macro development is ready. For preparation PCase must be downloaded and installed for the version of OpenEdge which will be used for the work.

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15 Jan Hard Migration – Copy, Paste and Change

Posted at 12:00h in Migration

The hard migration is useful, when the goal is, to migrate an OpenEdge application the fastest way, let's say from ADM to HTML5 UI. The copy, paste and change approach keeps the work flow and logic of existing programs, so the migration risks are low.

This migration strategy is based on the unique structure of OF-1, where any source code is ABL. To program data fetching or handle user interactions - so called client logic or screen logic - you can use more or less the same code as is use in an ADM/2 or GUI Builder / Appbuilder....