SAP Java Connector (SAP JCo) is a Java-based component that supports communication with an SAP Server in both directions. InterSystems provides components that you can add to a production to enable the production to communicate with SAP JCo, and thus with an SAP Server. The following picture shows the architecture:
The architecture includes the Java Gateway, which must be running.
To communicate with SAP JCo, the production must include the following items:
EnsLib.SAP.OperationOpens in a new window, which communicates via TCP/IP with the Java Gateway.
EnsLib.JavaGateway.ServiceOpens in a new window, which starts and stops the Java Gateway.
This business host performs an additional function: its settings indicate the location of the Java Gateway. When correctly configured, the EnsLib.SAP.OperationOpens in a new window business host retrieves those settings and uses them. Thus it is not necessary to set any environment variables.
Unlike most business hosts in a production, EnsLib.JavaGateway.ServiceOpens in a new window does not handle any production messages.
It is not necessary to manually create message classes to carry the SAP requests within the production. InterSystems provides a CSP page that you can use to generate the message classes.