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Reuse in adf applications
- 1. Reuse in ADFapplications June 2nd 2016. Matthieu de Graaf & Frank Houweling Write once, Use everywhere
- 2. 2 Content • Short introductioninto Oracle ADF • Reuse in Taskflows • Reuse in the UI layer – Crud actions – Dynamic Save/Rollback buttons • Reuse in the model layer – Selection of sequences – Executing database procedures – Make a screen readonly in seconds • Final example – Global search out of the box
- 3. Frank Houweling • PrincipalJava / ADF / SOA consultant - AMIS (Netherlands) • Focus on performance diagnosis & performance management • Frequent speaker at Kscope, UKOUG and OOW • Tech Lead of ADF Performance Monitor Frank.houweling@amis.nl
- 4. Matthieu de Graaf •Principal Java / ADF consultant - AMIS (Netherlands) • Focus on ADF/Database and .Net (WPF) Development • Not so frequent speaker Matthieu.de.graaf@amis.nl
- 5. 5 Short introduction intoOracle ADF Application Module ViewController Part Model Part Taskflow View Objects Entity Objects Application Module Page(fragments) Beans Database UI description Dynamic behavior of UI Business data, retrieves data Interface to the outside world Interface to the ViewController Transaction management 1:1 presentation of the database tables in the java world
- 6. 6 Reuse in theUI Layer: Taskflowtemplates • By means of taskflow templates • Default Structure • Error handling • Close actions for a popup
- 7. 7 Reuse in theUI layer: TaskflowBean Library Module TaskflowBean Taskflow ModuleBean taskflowBean Is instantiated in Is subclassed in
- 8. 8 TaskflowBean: Utility Functions •Contains general utility functions – Example refresh of UI components Page: Bean: this.refreshPageComponent(“buttonbarPanel");
- 9. 9 TaskflowBean: Container forbehaviour of declarative components • Container for (declarative) components
- 10. 10 Container for declarative components– pattern Library Module DeclCompBean Page TaskflowBean Binds to Declarative component Can be subclassed in ModuleDeclCompBean Binds to Is used in My Declarative component Default behavior Module specific behavior
- 11. 12 Example declarative component • CrudPanel:For Inserting, editing and deleting occurences – Edit link default not shown
- 12. 13 CrudBean: Add Partin the library
- 13. 14 Crud Actions: nondefault behavior
- 14. 15 TaskflowBean: Enabling/Disabling Save/Cancel buttons •Enabling/Disabling of save/cancel buttons depending on the dirty state of the Datacontrol associated with the taskflow No changes to be saved Changes
- 15. 16 TaskflowBean: Enabling/Disabling Save/Cancel buttons LibraryModule Taskflow PageLifeCycleBean Page RibbonSavePanel component Label Autosubmit is true Evaluates #{pageFlowScope.taskflowBea n.isDataControlDirty taskflowBean Refreshes the panel surrounding the save/Cancel buttons SaveBean
- 16. 17 Reuse in themodel layer • Generate sequence values • Call stored procedures/functions • Set page in readonly mode
- 17. 18 Reuse in demodel layer • Use Subclasses of the standard Entity/ViewObject/ApplicationModule classes Class Subclass of object Subclass of row of Object ApplicationModule ApplicationModuleImpl - Entity EntityImpl ViewObject ViewObjectImpl ViewObjectRowImpl
- 18. 19 Generate sequence inADF • Override EntityImpl: initDefaults method
- 19. 20 Call stored procedures •Override ApplicationModuleImpl
- 20. 21 Make a pagereadonly – Updatable – Readonly • Classic approach: Set an EL Expression on the readonly attribute of UI Components
- 21. 22 Make a pagereadonly Library Module ViewObjectRowImpl Taskflow taskflowBean page ViewObjectImpl UpdateMode Property attributeUpdatable Property Sets the attributeUpdatable Property UpdateMode prop. Iterator prop.
- 22. 23 Reuse in UIand Module layer working together: Global search • Purpose: 1 Search field queries all columns in a viewObject with wildcards
- 23. 24 Global search: Pattern LibraryModule Taskflow taskflowBean Calls the viewObject by iterator name View ObjectImpl Puts custom viewCriteria on the ViewObject and query searchBean IteratorName pageSearchPanel
- 24. 25 Conclusion • In OracleADF you can accomplish reuse in a lot of ways • Switch from declarative approach to a code approach • Your application – Will have consistent look and feel – Will take less time to develop – Can be maintained easier