1.3 Job control function of JP1/AJS3 for EAP
An R/3 system usually executes a program in interactive mode (online). However, when a program is to be executed at a specific time (or at periodic intervals) or a large quantity of data is to be printed, the processing is executed as a batch process (background job) by the R/3 system.
By using the job control function of JP1/AJS3 for EAP, you can control the background jobs of the R/3 system from a non-R/3 system.
JP1/AJS3 for EAP uses the XBP interface, which is an external management interface for the R/3 system, to control the background jobs of the R/3 system. The XBP interface is an open interface provided by SAP for controlling the background jobs of the R/3 system from a non-R/3 system.
The background jobs of the R/3 system that can be controlled by JP1/AJS3 for EAP are those that can be defined and executed using transaction code SM36.
Figure 1-3 shows the status transition of a background job within an R/3 system.
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![[Figure]](GRAPHICS/ZU010200.GIF)
JP1/AJS3 for EAP allows you to use commands to control the status transition of a background job shown in Figure 1-3 . To change the job status from scheduled to released, for instance, use the jr3bjrel command, which releases an R/3 system background job.
Note that a background job consists of one or more job steps. The following two types of job steps can be used in background jobs:
R/3 system background job control that can be executed from JP1/AJS3 for EAP is explained below with reference to the transition sequence of the background job status.
For details of the commands used with JP1/AJS3 for EAP, see 4. Commands.
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