I have been using the actionErrors and actionMessage features of Struts2 for
some time and they have worked well for providing user feedback, (e.g.;
"Business Center deleted successfully", "User already exists with this ID",
etc.). I add the error or the message in the action class like so:


  public String add() throws Exception {
   
   try {
   service.addUser(user);
   users = service.getAllUsers();
     
   } catch(PersistenceExistsException ee) {
     addActionError(getText("user.alreadyExists"));
     return Action.INPUT;
     
   } catch(PersistenceNotFoundException nfe) {
     this.addActionError(getText("global.unableToProcessRequest"));
     return Action.INPUT;
   }
 addActionMessage(getText("user.addSuccess"));
    return SUCCESS;
  }

This had the effect of deleting a user, refreshing the list of all users,
and sending a success message if all went well.
If something went wrong, a descriptive error would be displayed just above
the list of users.

It worked well until I began to incorporate the AJAX tags into the mix. I
use a s:div to display the list of users:

<tr>
 <td colspan="2">
   <s:div id="users" theme="ajax" href="userAdmin.do" listenTopics="delete"
>loading...</s:div>
 </td>
</tr>

The JSP fragment that is returned to this div contains the list of users.
This also worked well. But the JSP also contains the actionError and
actionMessage tags:

<tr>
 <td colspan="4" class="PageStatus">
   <font color="#FF0000"><s:actionerror/></font>
 </td>
</tr>
<tr>
 <td colspan="4" class="PageStatus">
   <font color="#00FF00"><s:actionmessage/></font>
 </td>
</tr>

The problem is that these tags are never populated while using the AJAX
feature. Neither errors nor messages are displayed at any time. If I use
the same url that the s:div tag uses, and key it into the browser address,
the row is added or deleted and the message displays correctly, (using the
exact same jsp). When I use an ajax link:

<s:url id="removeUrl" action="removeUser">
 <s:param name="userId" value="userId" />
</s:url>
<s:a href="%{removeUrl}" theme="ajax" notifyTopics="delete" ><s:text
name="global.delete"/></s:a>

the correct user is deleted, the div is refreshed with the new list of
users, but no message displays.


Are the message tags handled differently when using AJAX?


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