Communication Between the J2EE Server and the SAP ECC System 

Schedule

The graphic shows an example of the communication between the J2EE server and one or more SAP ECC systems:

...

       1.      An employee accesses a Human Resources ESS application (service) in the Web browser.

       2.      The J2EE server’s User Management Engine (UME) checks whether the user is authorized to log on to the server.

In the example in the diagram, the user administration is in the SAP ECC system. This is only one of several options available for user administration.

       3.      The J2EE server starts a general service that determines the configuration of the ESS menu and the employee's name in the SAP ECC system. The system that is specified in the SAP_R3_SelfServiceGenerics JCo connection is used.

       4.      The SAP ECC system that is specified in the SAP_R3_HumanResources JCo connection checks whether the employee is authorized to use the service.

Steps 3 and 4 refer to “the JCo connection." In actual fact, two JCo connections are required for each of the steps: one for the metadata and one for the application data. Fore more information, see Setting Up SAP Java Connector (JCo) Connections.