Execute application module method automatically from uix page

Question

Hi,
We are developping an application using Jheadstart 10.1.2.2 (build 32) with UIX pages as a view.
We have build a custom method on our application module class that creates and saves in a directory a chart in function of a parameter we pass to this method.
We would like to execute this method every time we acces a form page since this pages has to show the chart that our method creates. We would like to know if it is possible to execute this method automatically every time we acces this form page without having to press a button each time.
Thanks in advanced.
Xavier

Answer 1

Xavier,
I am not sure UIX works as JSPX and JHS 10.1.2 as 10.1.3, but that is what I would do if I wanted to execute a method on page load:
1. Create a new managed bean(MyBean) in your faces-config which implements oracle.adf.controller.v2.PagePhaseListener interface
2. Go to the pagedef file of your page, right click it in structure pane and set the controller class to 'MyBean'
3. in MyBean and in beforePhase() method access App Module and call your function [see 4]. I quote this from ADF Dev.Guide 10.1.3 for how you can get App Module and call your function on it:
// 1. Access the FacesContext
FacesContext fc = FacesContext.getCurrentInstance();
// 2. Create value binding for the #{data} EL expression
ValueBinding vb = fc.getApplication().createValueBinding("#{data}");
// 3. Evaluate the value binding, casting the result to BindingContext
BindingContext bc = (BindingContext)vb.getValue(fc);
// 4. Find the data control by name from the binding context
DCDataControl dc = bc.findDataControl("SRServiceDataControl");
// 5. Access the application module data provider
ApplicationModule am = (ApplicationModule)dc.getDataProvider();
// 6. Cast the ApplicationModule to its client interface
SRService service = (SRService)am;
// 7. Call a method on the client interface
service.doSomethingInteresting();
4. Check the phase and call your function in beforePhase method of your MyBean (implementing PagePhaseListener)
public void beforePhase(PagePhaseEvent event) {
FacesPageLifecycleContext ctx =(FacesPageLifecycleContext)event.getLifecycleContext();
if (event.getPhaseId() == MY_DESIRED_PHASE) service.doSomethingInteresting();
Probably, there is a shortcut to all these, or an alternative approach, which I myself will be happy to know about.