Storing Objects in Request Scope

Question

Hello,
I'm trying to pass an object in the request scope between a JSPDynPage and the associated JSP however the object is always null. If I store it in the session I am able to retrieve it.
Could anyone assist in how to do this?
My code is as follows, thanks and regards.
public class MyClass extends PageProcessorComponent {
  private String redirectToPage = "";
  private static final String INITAL_PAGE = "initialpage.jsp";
  private static final String SECONDARY_PAGE = "secondarypage.jsp";
  private static final String BEAN_ALIAS = "myBean";
  public void doProcessBeforeOutput() throws PageException {
    if (redirectToPage == null || redirectToPage.equals("")) {
      this.setJspName(INITAL_PAGE);
    } else {
      this.setJspName(redirectToPage);
  public void onMyButtonEvent (Event event) {
    redirectToPage = SECONDARY_PAGE;
    MyBeanClass myBean = new MyBeanClass();
    IPortalComponentRequest componentRequest = (IPortalComponentRequest)getRequest();
    componentRequest.putValue(BEAN_ALIAS, myBean);
secondarypage.jsp:
<%@ page session = "true"%>
<%@ taglib uri="tagLib" prefix="hbj" %>
<jsp:useBean id="myBean" scope="request" class="MyBeanClass " />
<hbj:content id="myContent">
  <hbj:page title="myTitle">
   <hbj:form id="myForm">
     <% if (myBean != null) {
          out.println("null");
        } else {
          out.println("not null");
     %>
   </hbj:form>
  </hbj:page>
</hbj:content>
output on the page is always "null" ??

Answer 1

Hi,
Thanks for your posts... the null logic was actually a typo.
I've solved the problem myself - basically I think the <jsp:useBean doesn't work as I expect it (that is automatically obtain the handle to the bean):
MyDynPage.java:
package com.my;
import com.sapportals.htmlb.*;
import com.sapportals.htmlb.enum.*;
import com.sapportals.htmlb.event.*;
import com.sapportals.htmlb.page.*;
import com.sapportals.portal.htmlb.page.*;
import com.sapportals.portal.prt.component.*;
public class MyDynPage extends PageProcessorComponent {
  public DynPage getPage(){
    return new MyDynPageDynPage();
  public static class MyDynPageDynPage extends JSPDynPage{
    public void doInitialization(){
    public void doProcessAfterInput() throws PageException {
    public void doProcessBeforeOutput() throws PageException {
          IPortalComponentRequest componentRequest = (IPortalComponentRequest)getRequest();
          componentRequest.putValue("myRequestParam", "My Request Param Value");
          MyBean myBean = new MyBean("My Bean Title Value");          
          componentRequest.putValue("myBean", myBean);
         this.setJspName("myJSP.jsp");
MyBean.java:
package com.my;
import java.io.Serializable;
public class MyBean implements Serializable {
     private String txtTitle;
     //setters
     public void setTxtTitle(String txtTitle) { this.txtTitle = txtTitle; }
     //getters
     public String getTxtTitle() { return this.txtTitle; }
     public MyBean(String txtTitle) { //constructor
          this.txtTitle = txtTitle;
myJSP.jsp:
<%@ page session = "true"%>
<%@ taglib uri="tagLib" prefix="hbj" %>
<jsp:useBean id="myBean" scope="request" class="com.my.MyBean" />
<hbj:content id="myContext" >
  <hbj:page title="PageTitle">
   <hbj:form id="myFormId" >
    <%
           String myRequestParam = (String)componentRequest.getValue("myRequestParam");
          out.println("myRequestParam: " + myRequestParam + "<br>");
          if (myBean == null) {
               out.println("myBean is null<br>");
          } else {
               out.println("myBean is not null<br>");
               out.println(myBean.getTxtTitle() + "<br>");
          com.my.MyBean myOtherBean = (com.my.MyBean) componentRequest.getValue("myBean");
          if (myOtherBean == null) {
               out.println("myOtherBean is null");
          } else {
               out.println("myOtherBean is not null<br>");
               out.println(myOtherBean.getTxtTitle() + "<br>");
    %>
   </hbj:form>
  </hbj:page>
</hbj:content>
The output is:
myRequestParam: My Request Param Value
<b>myBean is null</b>
myOtherBean is not null
My Bean Title Value
It appears that you can save objects in the request scope however you need to manually retrieve them. I'm pretty sure that this is not the case in other J2EE servers as the <jsp:useBean tag should imply that I want the bean retrieved from the scope automatically or created if it's null.
However the use of the <jsp:useBean appears to work correctly/as expected when using the session scope.
Thanks for your assistance.
DSR