Building Extensible Composite Applications for SAP

... Introduction ... 9

1 ... Design Principles of Modern Java Applications ... 17
... 1.1 ... Application Architecture and Design ... 17
... 1.2 ... Summary ... 27

2 ... Fundamentals of Extensibility Concepts ... 29
... 2.1 ... Basic Concept ... 29
... 2.2 ... Extensibility Implications and Non-Functional Prerequisites ... 35
... 2.3 ... Application Componentization ... 43
... 2.4 ... Typical Use-Cases ... 44
... 2.5 ... Exemplary Business Scenario ... 46

3 ... Extensibility Based on Java Class Loading ... 47
... 3.1 ... Use-Case Introduction ... 47
... 3.2 ... Creating the Example Application ... 49
... 3.3 ... Creating the Custom Implementation ... 72

4 ... Extensibility Based on Enterprise JavaBeans ... 81
... 4.1 ... Use-Case Introduction ... 81
... 4.2 ... Creating the Example Composite Application ... 82
... 4.3 ... Developing the Extension Points ... 102
... 4.4 ... Developing a Custom Implementation ... 109
... 4.5 ... Summary ... 114

5 ... Extensibility Based on WebServices ... 115
... 5.1 ... Use-Case Introduction ... 116
... 5.2 ... Creating the Example Application ... 116
... 5.3 ... Introduction to Enterprise Services ... 118
... 5.4 ... Creating the Service Provider ... 122
... 5.5 ... Creating the Service Consumer ... 130
... 5.6 ... Creating an Alternative Web Service Provider ... 138
... 5.7 ... Summary ... 141

6 ... Introducing an Extensibility Framework ... 143
... 6.1 ... Architecture and Capabilities ... 144
... 6.2 ... Implementing the Extensibility Framework ... 157
... 6.3 ... Testing and Debugging the Extended Application ... 162
... 6.4 ... Summary ... 163

7 ... Summary ... 165
... 7.1 ... Extensibility Based on Java Class Loading ... 166
... 7.2 ... Extensibility Based on EJBs ... 167
... 7.3 ... Extensibility Based on Web Services ... 168
... 7.4 ... Implicit Extensibility Based on Interceptors ... 169
... 7.5 ... Comparison ... 170

... Appendices ... 175
... A ... Further Reading