Program Structure Overview in Monarch Apps

IBM i Programs written in RPG and CL are Migrated as C# classes derived from ASNA.QSys.HostServices.Program (which we will refer in this document as a QSys Program - for short -).

In order for a QSys Program class to support the IBM i Developer’s model, it must rely on other classes such that it may :

• Use Display Pages.
• Perform record-at-time File Access logic: SetLL, Chain, Update, Delete, etc.
• Send and Receive Messages described externally.
• Condition logic based on Indicators.
• Deal with operations involving Fixed types.
• Belong to a stateful work environment or Job. Including Local Data Area.

In this section the Concepts behind the implementation of such framework will be presented.