Some basics about OAF

1. On click of a button, Process Form Request is executed.
2. Process Request is similar to When-New-Form Trigger in Oracle Form
3. OA Page is loaded using XML Importer
4. In the method processFormRequest of the Controller, you can access the values of the page by using notation pageContext.getParameter("")
5. Application Module is like a connection manager which maintains state of the application.
6. Inside the controller, all the Database Related interactions for example interaction with View Objects happens via Application Module.
OAApplicationModuleImpl oaapplicationmoduleimpl = (OAApplicationModuleImpl)oapagecontext.getApplicationModule(oawebbean);
OADBTransaction oadbtransaction = (OADBTransaction)oaapplicationmoduleimpl.getDBTransaction();

7. processFormRequest
This method is commonly used to react/respond to the event that has taken place, for example click of a button.

8. processRequest
In this method, usually page rendering related code is written. Effectively, each GUI component is a bean that gets initialised duringprocessRequest.

As a start up, identify the VO associated to ur page by using "About this page" link which is enabled through a profile value. Then download all the files from the $JAVA_TOP/oracle/apps//.... to ur local drive.

1. Create a new project and set the classpath of the project to the downloaded files above.
2. Extend the standard VO identified above and change the query associated with it & create a new VO.
3. Use substitutions to replace the original VO with the extended VO.
4. Migrate ur files to the apps server.