<?xml version="1.0" encoding="UTF-8"?>
<chapter>
     <table>
	  <title>Component identification parameters </title>
      <tgroup cols="2">
	  <thead>
            <row>
                  <entry>Name</entry>
                  <entry>Value</entry>
            </row>
        </thead>
        <tbody>
		
          <row>
            <entry>listener-class</entry>
            <entry>org.ajax4jsf.framework.ajax.AjaxListener</entry>
          </row>
		  <row>
            <entry>event-class</entry>
            <entry>org.ajax4jsf.framework.ajax.AjaxEvent</entry>
          </row>
          
          <row>
            <entry>tag-class</entry>
            <entry>org.ajax4jsf.taglib.html.jsp.AjaxListenerTag</entry>
          </row>
		  
        </tbody>
      </tgroup>
    </table>
	

  <section>
    <title>Creating on a page</title>
    <para>Simple Component definition on a page:</para>

  <para>
      <emphasis role="bold">Example:</emphasis>
 </para>

	<programlisting role="XML"><![CDATA[...
	<a4j:ajaxListener type="demo.Bean"/>
...
]]></programlisting> 
  </section>
 
  <section>
    <title>Dynamical creation of a component from Java code</title>
	  <para>
		  <emphasis role="bold">Example:</emphasis></para>		
	  <programlisting role="JAVA"><![CDATA[package demo;
	  
public class ImplBean implements import org.ajax4jsf.component.html.AjaxListener{
	...
}
]]></programlisting>

	  <programlisting role="JAVA"><![CDATA[
import demo.ImplBean;
...
ImplBean myListener = new ImplBean();
...
]]></programlisting>
		
  </section>  
  
  <section>
    <title>Key attributes and ways of usage</title>
	<para>
Additional to the listeners provided by JSF specification, RichFaces add one more: ajax Listener (
	<emphasis role="bold"><property>&lt;a4j:ajaxListener&gt;</property>
	</emphasis>).
Ajax Listener is invoked before the Render Response phase. Instead of action Listener of Value Change Listener which are not
invoked when Validation of Update Model phases failed, ajax Listener is guarantied to be invoked for each Ajax response. Thus, it is
a good place for update the list of re-rendered components, for example.
Ajax Listener is not invoked for non-Ajax request and when RichFaces works in "Ajax Request generates 
Non-Ajax Response" mode. Therefore, ajax Listener invocation is a good indicator that Ajax response is going to be processed. 
Attribute &quot;type&quot; described in <link linkend="ajaxListener attributes">the following chapter</link>. defines the fully qualified Java class name for listener.This class should implement org.ajax4jsf.framework.ajax.ajaxListener
interface. You can access to the source of the event (Ajax component) using event.getSource() call. 
	</para>

 </section>
 <section>
  <para>
      <emphasis role="bold">Example:</emphasis>
 </para>

    <programlisting role="XML"><![CDATA[...
	<a4j:commandLink id="cLink" value="Click it To Send Ajax Request">
		<a4j:ajaxListener type="demo.Bean"/>
	</a4j:commandLink>
...
]]></programlisting> 

<para>
      <emphasis role="bold">Example:</emphasis>
 </para>

    <programlisting role="JAVA"><![CDATA[package demo;

import org.ajax4jsf.framework.ajax.AjaxEvent;

public class Bean implements org.ajax4jsf.framework.ajax.AjaxListener{
...	
	public void processAjax(AjaxEvent arg0){
		//Custom Developer Code 
	}
...
}
]]></programlisting> 
  </section>  

  <section>
    <title>Relevant resources links</title>
	<para>
	  Some additional information about usage of component can be found 
	  <ulink url="http://livedemo.exadel.com/richfaces-demo/richfaces/ajaxListener.jsf?c=ajaxListener">here.
	</ulink>
	</para>
  </section>
  
</chapter>