SAP Java Connector — Operation and Development

Ilja-Daniel Werner is technical development leader SAP at Oce Document Technologies GmbH, Konstanz. He has been working with SAP interfaces for five years and had already collected experience with interfaces to other critical systems (air traffic control, large databases). He used to be an author for a professional IT magazine.

1. Introduction and Prerequisites ... 3 ... 1.1 Goal of This Book ... 3 ... 1.2 Preparations ... 4 ... 1.3 Variants of the SAP RFC Interface ... 5 ... 1.4 Components of the RFC Layer ... 8 2. Getting Started with Java Connector ... 11 ... 2.1 Java Calls ABAP ... 11 ... 2.2 SAP Calls Java ... 14 ... 2.3 The Right Connection ... 21 3. Error Handling with SAP Java Connector ... 25 ... 3.1 Handling ABAP Exceptions in Java ... 25 ... 3.2 Using Java to Trigger ABAP Exceptions ... 26 ... 3.3 Using the SAP Application Log for Java Exceptions and Other Messages ... 26 4. Debugging Between Two Worlds ... 37 ... 4.1 Start of a Long Debugging Session ... 38 ... 4.2 ABAP Debugger Starts Automatically ... 39 5. JCO.Server for Advanced Learners ... 41 ... 5.1 Monitoring JCO.Server Closely ... 41 ... 5.2 Transactional Extension of JCO.Server ... 42 ... 5.3 SAP Enterprise Connector and JCO.Server ... 45 ... 5.4 Tables, Structures, and Binary Data ... 46 6. Securing Communication ... 51 ... 6.1 Multiple JCo.Server Instances ... 51 ... 6.2 Starting Multiple JCO.Server Threads ... 51 ... 6.3 Transactional RFC with Callback ... 56 ... 6.4 Using a Parallel Workfl ow and Events ... 67 7. Database Synchronization via IDocs ... 69 ... 7.1 Administering the ALE Layer ... 69 ... 7.2 Receiving IDocs in the Java System ... 73 ... 7.3 Sending IDocs from the Java System ... 74 ... 7.4 Permitting the Reception of IDocs in the SAP System ... 81 8. Web Services Using SAP and Java Connector ... 83 ... 8.1 Web Services and SAP ... 83 ... 8.2 SAP Enterprise Connector Without NWDS ... 85 9. Summary and Outlook ... 89 Index ... 91