Seam+RichFaces fileUpload should incite reRender

Question

I am using RichFaces 3.3 and Seam 2 to develop a web application.

I have a page with the following:

<h:form>
<s:div id="myPanel">
  <h:messages/>
  <rich:fileUpload fileUploadListener="#{service.uploadEvent}" maxFilesQuantity="1">
    <a:support event="onuploadcomplete" reRender="myPanel"/>
  </rich:fileUpload>
</s:div>
</h:form>

In the service.uploadEvent method, I receive the file and add a FacesMessage to let the user know the file uploaded succesfully.

What actually happens is this:

1. The browser requests the page
   • The server starts temporary conversation #1
   • The server renders the page
   • The server sends the completed page and kills conversation #1
2. The client launches an AJAX fileUpload call
   • The server starts temporary conversation #2
   • The server calls service.fileUpload(). This method adds a FacesMessage to the Conversation-scoped FacesMessages seam component.
   • The server returns the response for the AJAX request and kills conversation #2, including all queued FacesMessages.
3. The 'onuploadcomplete' event is received, the client requests a reRender of 'myPanel'
   • The server starts temporary conversation #3
   • The server renders the page, creates a new empty FacesMessages for conversation #3
   • The server returns the response for the AJAX request (which contains an empty <h:messages/>) and kills conversation #3

I can solve this in a number of ways:

1. By creating a new FacesMessages component which is PAGE-scoped.
2. By marking the conversation as long-running in service.fileUpload() and ending it upon doing fileUploadComplete().

The proper way would be to reRender the page in the same conversation as service.fileUpload(). Is this possible?

Answer 1

This can only be solved by using a custom StatusMessages component and scoping it to a context which will still be available on Rerender (e.g. PAGE or longrunning CONVERSATION).