[jboss-user] [JBoss Seam] - Another conversation question: how to correctly begin one??

[MSchmidke]

There are a lot of possibilities for starting a conversation, but I still am not sure which is the best for the most cases. What do you think?

1. Beginning a conversation by action method

  | public class MainMenuBean {
  | 
  |   @Begin(flushMode=FlushModeType.MANUAL)
  |   public String doUsecase1() {
  |     return "/pages/usecase1";
  |   }
  | 
  |   @Begin(flushMode=FlushModeType.MANUAL)
  |   public String doUsecase2() {
  |     return "/pages/usecase2";
  |   }
  | }
  | 

- violates DRY (specify flushmode everytime, for example)
- scatters business logic (why should my menu bean be aware of the flushmode my component intends to use?)

2. Beginning a conversation by <begin-conversation flush-mode="MANUAL"> in pages.xml.
- violates DRY
- scatters business logic (program logic details in a xml file? why??).
- impossible to reload the page ("begin called from long running ...")

3. Create a page action method annotated with @Begin(flushMode=MANUAL)
+ Parameters concerning program logic at the right place (in the class which makes use of their functionality)
+ DRY-aware (put page action method in a common base class)
- impossible to reload the page

4. Use #{conversation.begin}
- same as 2

5. Annotate the @Create method with @Begin
+ Parameters at the right place
+ DRY
+ possible to reload the page

Until yesterday, I feeled that (5) was the best possibility, but as you have probably read, I found out that this does not work with page parameters. In fact, (1) seems to be the only variant which works in that situation.

What do you use?


Marcus.

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