Designing and Configuring Mapping Lookups

Mapping lookups access values in a back-end system when the mapping program is executed (at runtime). By using a mapping lookup, a mapping program can call functions from other application systems while a mapping program is being executed. The data transfer between mapping runtime and application systems is accomplished by means of a lookup programming interface (API). The API provides methods for accessing application systems using the RFC, JDBC, and SOAP adapter.

To set up a mapping lookup scenario, you have to perform a combination of activities at design and configuration time:

1. At design time (in the ES Repository), you define the mapping program.

   You can define lookups for message mappings, Java mappings, and XSLT mappings with Java enhancements.

   At design time, you have to perform the following steps:

   1. Provide an import function parameter (of type Adapter)

   2. Implement the call to the application system (using the import parameter)

      More information:

      • Using the Lookup API in a Java Mapping Program

      • Using the Lookup API in an XSLT Program

      • Using the Lookup API in a Message Mapping

   Note

   When setting up lookups using the JDBC or the RFC adapter with a message mapping, you can perform this step graphically.

   More information:

   • Defining JDBC Lookups Graphically

   • Defining RFC Lookups Graphically

2. At configuration time (in the Integration Directory), you have to perform the following steps:

   1. Configure the corresponding adapter in a (receiver) communication channel.

      More information: Defining Communication Channels

   2. Assign the corresponding operation mapping (that refers to the mapping program) in an interface determination.

      You have to do this to ensure that the ID of the receiver channel is transferred to your mapping program at runtime.

      More information: Defining an Interface Determination

More information: Adding Lookups to Mapping Programs