[jboss-user] [JBoss Seam] - clarification about propagation=

codelion do-not-reply at jboss.com
Fri Mar 30 08:07:08 EDT 2007

First, that propagation="end" was hard to find.  There was no example in the reference doc.  I think only recently it mentions for s:link that propagation accepts "end" as option.

Pete mentioned a while ago that "none" leaves the conversation sitting around, while "end" disposes of it.  So I'd like to use "end" more often, not to leave conversations around.

What's puzzling though is the following:

If in a my.page.xml for good reasons I have

  |  <begin-conversation join="true" />
  | </page>

and then in that page I also have an "exit" with

<s:link view="/myOther.xhtml" value="Outta Here" propagation="end" />

then what happens if when I get to myOther.xhtml the conversation is still there.  Actually I see its id passed in the URL with cid=1 even though in the URL there also is a conversationPropagation=end.

Now you folks who wrote that might think that's ok, but let's look at it as users of Seam.

That seems to be in contradiction to these ideas:  begin-conversation promotes when entering the page.  Then it is a long-running conversation.  Propagation="end" should be effective on its way out of the page, leave the conversation behind.

I'm sure there is a reason.  I've been looking at figure 9-3 in the The Java EE 5 Tutorial by Ball et al. when reading Seam reference section 6.1.  This still puzzles me.

I'm getting used to the fact that the there are requests (that I knew well from writing servlets) and responses trying hard to help give the appearance of objects in the UI, and there can be a redirect that makes things complicated.

But can I please have a begin-conversation and then offer the user a link outta there where he ends that conversation?  Simply?

For now I'll stick with propagation="none" though I think I want "end", no conversations lying around after "none".

Using a build from around March 15th.

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