title: Partial rendering via FacesContext
body: <p>actually I got a inputText and some ajax Request to render a datatable when a keyup event appears.</p>
  
  <p>mypage.xhmtl:</p>
  
  <pre><code> &lt;h:form id="form"&gt;
  
      &lt;h:inputText id="number_in" value="#{bean.number}" redisplay="false" &gt;
           &lt;f:ajax event="keyup" render=":form:dataTable" /&gt;
      &lt;/h:inputText&gt;
  
      &lt;h:dataTable id="dataTable" ...&gt;
      ...
      &lt;/h:dataTable&gt;
  
   &lt;h:form&gt;
  </code></pre>
  
  <p>I don't want to render the dataTable from the jsf page anymore. I want to render the dataTable in a MangedBean by FacesContext when a listener method is invoked.  </p>
  
  <p>mypage.xhtml:</p>
  
  <pre><code>&lt;h:form id="form"&gt;
  
      &lt;h:inputText id="number_in" value="#{bean.number}" redisplay="false" &gt;
           &lt;f:ajax event="keyup" listener="#{bean.onKeyup}" /&gt;
      &lt;/h:inputText&gt;
  
      &lt;h:dataTable id="dataTable" ...&gt;
      ...
      &lt;/h:dataTable&gt;
  </code></pre>
  
  <p>mybean.java:</p>
  
  <pre><code>  @ManagedBean(name="bean")
    @SessionScoped
    public class Bean {
       ...
       public void onKeyUp(AjaxBehaviorEvent event) {
          //Here I want to render the dataTable
       }
       ...
    }
  </code></pre>
  
  <p>How can I achieve that?</p>