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Chapter 1 Section 1.2
Introducing the SAP BAPI eWay About the SAP BAPI eWay
eWay™ Adapter for SAP BAPI User’s Guide 9 Sun Microsystems, Inc.
The meta data for a BAPI/RFC in SAP R/3 is extracted by the BAPI wizard, which uses
it to build the BAPI/RFC OTD. This OTD is used in Java Collaborations and eInsight
Business Processes to invoke or receive the BAPI/RFC call.
1.2.2 The SAP BAPI eWay Data Flows
When the SAP BAPI eWay communicates with the SAP R/3 software, it uses the RFC
protocol. The list below shows the RFC types of communication used:
Outbound (Java CAPS to SAP R/3): non-transactional (regular) RFC and
transactional RFC (tRFC)
Inbound (SAP R/3 to Java CAPS): non-transactional and transactional RFC (tRFC)
Outbound Data Flow: Java CAPS to SAP R/3
Outbound communications occur when the eWay receives data from Java CAPS and
sends it to SAP R/3 by calling a specific BAPI or RFM. The figure below shows a non-
transactional outbound process.
Figure 3 Outbound Data Flow: Java CAPS to SAP R/3
The figure above shows the following steps for the outbound data flow:
1 The Collaboration or Business Process populates the appropriate BAPI or RFC
Import, Changing, and Table parameter nodes on the BAPI/RFC OTD with data
from an inbound OTD.
2 The eWay logs onto the SAP R/3 application using preconfigured properties.
3 The eWay calls the BAPI OTD's execute() method. Any work performed is
immediately committed by SAP R/3 through autocommit.
4 The SAP R/3 applications returns successfully.
Inbound Data Flow: SAP R/3 to Java CAPS
For the inbound data flow, the SAP BAPI eWay can receive data from SAP R/3 via RFC
or tRFC. The sections below describe each protocol.
To enable the SAP BAPI eWay to receive data from SAP R/3, configure the
Environment properties with an RFC destination created within SAP R/3. For
information, refer to “Creating the RFC Destination for the eWay” on page 48.
Collaboration
Business Process
SAP R/3
System
BAPI
OTD
BAPI
eWay
execute()
execute()
Call RFM
Return
Time
Call RFM