XEO Web Components - Viewer Events

Viewer Events is a mechanism that allows to interact at the bean level during the life-cycle of a server request. The request life-cyle is depicted in figure 1. There are several points in the request life-cycle in which you can interact, the list is in the following table:

All these properties (events) accept an EL Expression to a method with the following signature:

public void myEventMethod( PhaseEvent e);

Let's see an example:

Viewer Declaration:

<xvw:viewer beanClass='MyBean'
    beanId='viewBean'
        afterUpdateModelPhase= '#{viewBean.afterUpdateModel}'
        afterRenderPhase= '#{viewBean.phaseEvent}'
>

Bean:

public class MyBean {
    public void afterUpdateModel( PhaseEvent e ) {
         System.out.println( "After update Model!!" );
    }
    public void afterRender( PhaseEvent e ) {
         System.out.println( "Before update Model!!" );
    }

}

The life-cycle of a server request is depicted in figure 1, bellow:

Figure 1 - The life-cycle of a server request

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