Too many requests? (rich:Calendar)

[jeric]

Hello everyone,

I'm having a question about the usage of the rich:calendar component --

I have a table that is filled whenever I choose another date on the calendar. This seems to work, but when I view the logging, I see the following events:

• table 'getters' are called, filling the table with the old data
• setter is called
• table 'getters' are called again, this time with the updated data

Every table getter currently fires a query to a database, and what I want to achieve is only one query, after the date is updated.

I'm using the latest version of Richfaces, and JSF 2.0. The application is deployed on Tomcat 6 (We're currently migrating to jBoss though ;-))

My current code looks like this:

main.jsp

<rich:panel styleClass="panel">

   <h:outputLabel for="calendar" value="Date:" />

   <a4j:outputPanel id="calendar" layout="block" >

      <rich:calendar value="#{mainBean.selectedDate}" popup="true"

         datePattern="yyyy-MM-dd" showApplyButton="false" cellWidth="24px" cellHeight="22px" >

         <a4j:support event="onchanged" reRender="curDate" />

      </rich:calendar>

   </a4j:outputPanel>

   <h:outputText id="curDate" value="#{mainBean.selectedDate}" />

</rich:panel>

MainBean.java (the relevant methods)

public class MainManagedBean extends ManagedBean {

  private Date selectedDate;

  public List<DashBoardBean> getMockUpDashboard() {

    System.out.println("Getting mockup data");

    return mockUpDashboard;

  }

  public void changeSendDate(CurrentDateChangeEvent event) {

    System.out.println("ValueChangeEvent: " + event.getCurrentDate());

    FacesContext.getCurrentInstance().renderResponse();     // This doesn't seem to fix my problem    

  }

  public Date getSelectedDate() {

    return selectedDate;

  }

  public void setSelectedDate(Date selectedDate) {

    System.out.println("Date set: " + selectedDate);

    this.selectedDate = selectedDate;

  }

}

Richfaces related items in my web.xml:

     <context-param>

          <param-name>javax.faces.STATE_SAVING_METHOD</param-name>

          <param-value>client</param-value>

     </context-param>

     <context-param>

          <param-name>org.richfaces.SKIN</param-name>

          <param-value>blueSky</param-value>

     </context-param>

     <context-param>

          <param-name>org.richfaces.CONTROL_SKINNING</param-name>

          <param-value>enable</param-value>

     </context-param>

     <filter>

          <display-name>RichFaces Filter</display-name>

          <filter-name>richfaces</filter-name>

          <filter-class>org.ajax4jsf.Filter</filter-class>

     </filter>

     <filter-mapping>

          <filter-name>richfaces</filter-name>

          <servlet-name>Faces Servlet</servlet-name>

          <dispatcher>REQUEST</dispatcher>

          <dispatcher>FORWARD</dispatcher>

          <dispatcher>INCLUDE</dispatcher>

     </filter-mapping>

When I change the date, this is what I see in my log:

Getting mockup data
Date set: Thu May 20 00:00:00 CEST 2010
Getting mockup data

I also tried using the following support tags, but then I only received the date that I selected *before*, besides the problem I described above...

<a4j:support event="ondateselected" reRender="curDate" />

<a4j:support event="ondateselect" reRender="curDate" />

I've been searching for a long time now, so I really hope someone can help me with this.

Kind regards and thanks in advance!

[ilya_shaikovsky]

Getters called a few times during lifecycle according for JSF specification and this behavior valid for any component. You could check without RichFaces using standard inputs. (old value get first time in this case in order to rise ValueChangeEvent on decode, and then get during rendering in order to encode component).

[jeric]

Hi Ilya,

You're right, how could I forget

Thanks!