Implementing and Exposing a Background Callable Object 

Purpose

In Guided Procedures (GP) you can encapsulate any function that does not expose a user interface as a callable object for background execution. For example, if you need to implement a certain logic that should remain hidden from the end user, you can create a Java class that is executed transparently in background mode at runtime.

In this tutorial, you will learn how you implement a simple callable object that retrieves user details by a given user ID.

Prerequisites

●     You have basic knowledge of Java programming.

●     You are familiar with the SAP NetWeaver Development Infrastructure. For more information, see Working with the SAP NetWeaver Development Infrastructure.

Process Flow

The implementation of a background callable object to the point where it is available for use in a process goes through the following phases:

...

       1.      You create and configure a Java development component (DC).

       2.      You implement your background callable object in the above component.

       3.      You create a J2EE library and deploy it to the SAP Web Application Server.

       4.      You expose the class as a callable object in the GP design time.

       5.      Finally, you test and activate the object.

 

 Your first step is to create a Java DC project.