How to invoke a method from Managed Bean when JSPX Page Loads in ADF

Scenario: In order to restrict the number displayed rows in the table, I have to set the View Criteria on the Iterator before the page loads.

Solution: I have created a method (fetchSourceRecords()) in the Managed bean (Attachments.java) in which I’m setting the View Criteria on the iterator. In order to call this method (fetchSourceRecords()) on Page loads

1) You have to add the below code into your Managed bean (Attachments.java).

public void beforePhase(PagePhaseEvent pagePhaseEvent) {
if (pagePhaseEvent.getPhaseId() == Lifecycle.PREPARE_MODEL_ID) {
onPageLoad();
}
}

public void afterPhase(PagePhaseEvent pagePhaseEvent) {
if (pagePhaseEvent.getPhaseId() == Lifecycle.PREPARE_RENDER_ID) {
// onPagePreRender();
}
}

public void onPageLoad() {
if (!AdfFacesContext.getCurrentInstance().isPostback()) {
// add your onPageLoad event here

// to set the View Criteria on the Iterator
fetchSourceRecords();
}
}

2) Your Managed bean should implements PagePhaseListener as shown below –

public class Attachments implements PagePhaseListener{ }

You have to Import “oracle.adf.controller.v2.lifecycle.PagePhaseListener;”

3) Next, in your JSPX page defination make sure you add the ControllerClass that points to the managed bean that handles the onPageLoad event.

/* PageDef file */
<pageDefinition xmlns=”http://xmlns.oracle.com/adfm/uimodel&#8221;
version=”11.1.1.51.88″ id=”SamplePageDef” Package=”com.sample.view”
ControllerClass=”#{Attachments}”>
…
</pageDefinition>

In the Page definition file specify the package path in “Package” attribute and Managed bean class name in “ControllerClass” attribute.

By this whenever you page loads, the onPageLoad() method gets invoked which inturn invokes the fetchSourceRecords() method. You can even call multiple methods in onPageLoad() method.