10 Replies Latest reply on Jun 15, 2006 6:00 AM by liudan2005

method defined in pages.xml can't start a converstaion

liudan2005 Jun 12, 2006 8:07 AM

I have a conversational stateful bean that has a start() method annotated with @Begin(join=true). However, when this method is triggered from a page that's define in pages.xml, the converstation doesn't get started.

<page view-id="/booking.xhtml">#{booking.start}</page>

Is this a bug, or a limitation in Seam?

1. Re: method defined in pages.xml can't start a converstaion

davidatkinsuk Jun 12, 2006 2:44 PM (in response to liudan2005)
I think you want to try

<page view-id="/booking.xhtml" action="#{booking.start}">my conversation name</page>

The element value (which you used in your above fragment) is for providing the conversation name.

hope that works

dave
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2. Re: method defined in pages.xml can't start a converstaion

gavin.king Jun 12, 2006 3:52 PM (in response to liudan2005)

Right.
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3. Re: method defined in pages.xml can't start a converstaion

liudan2005 Jun 13, 2006 8:56 AM (in response to liudan2005)

how do I define a conversation name in this case? I thought converstations are identified by IDs but not names. So I don't know what name I should specify here.
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4. Re: method defined in pages.xml can't start a converstaion

theute Jun 13, 2006 10:18 AM (in response to liudan2005)
You don't need to specify any if you don't use the workspace management. (Otherwise you can put any name)

In your case:
<page view-id="/booking.xhtml" action="#{booking.start}"/>

is probably enough for what you want to achieve
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5. Re: method defined in pages.xml can't start a converstaion

liudan2005 Jun 13, 2006 11:14 AM (in response to liudan2005)

I've tried it but it doesn't work. Here is what I get in console when trying to any method of booking class after page is displayed:
no long-running conversation for @Conversational bean: booking
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6. Re: method defined in pages.xml can't start a converstaion

davidatkinsuk Jun 13, 2006 2:14 PM (in response to liudan2005)
I think this is because you have annoted your conversational bean as a nested conversation
@Begin(join=true)

try dropping the join = true
@Begin

and it should work fine
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7. Re: method defined in pages.xml can't start a converstaion

liudan2005 Jun 13, 2006 4:28 PM (in response to liudan2005)
Removing "join=true" doesn't help. I still get the same error. Here is my bean:
@Stateful @Name("booking") @Scope(CONVERSATION) @Interceptors(SeamInterceptor.class) @LoggedIn @Conversational(ifNotBegunOutcome = "home") public class BookingActionimplements Booking, Serializable { ... @Begin public String start() { em.refresh(user); return "booking"; } public String confirm() { ... return "confirmed"; } }

my pages.xml
<page view-id="/booking.xhtml" action="#{booking.start}"/>

When user click confirm button in booking.seam page, the confirm is not called. Instead, the user gets redirected to home page because no conversation exists.
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8. Re: method defined in pages.xml can't start a converstaion

gavin.king Jun 15, 2006 3:37 AM (in response to liudan2005)

Probably you are calling some other method of the bean before you call the start() method.
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9. Re: method defined in pages.xml can't start a converstaion

gavin.king Jun 15, 2006 3:37 AM (in response to liudan2005)

ie. try removing @Conversational
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10. Re: method defined in pages.xml can't start a converstaion

liudan2005 Jun 15, 2006 6:00 AM (in response to liudan2005)

I've simplified my code and tried everything i can but still no luck. Here is my code list in full

MyStuffAction.java

@Stateful
@Name("myStuff")
@Scope(CONVERSATION)
public class MyStuffAction implements MyStuff
{

 @In(required=false,scope=ScopeType.CONVERSATION)
 @Out(required=false,scope=ScopeType.CONVERSATION)
 private String name;

 @Begin
 public String sayHello()
 {
 name="James";
 System.out.println("Hello:"+name);

 return null;
 }

 public String sayBye(){
 System.out.println("Bye:"+name);

 return "main";
 }
 @Destroy
 @End
 @Remove
 public String end()
 {
 return null;
 }

}

pages.xml

<pages>
 <page view-id="/mypage.xhtml" action="#{myStuff.sayHello}" />
</pages>

mypage.xhtml

<body id="pgHome">
<h:form>
 <div id="document">

 <div id="container">
 <div id="sidebar">
 <h:commandButton action="#{myStuff.sayBye}" value="sayBye" />

 </div>
</div>

 </div>
</h:form>
</body>

Here is what I get from console(name is null when sayBye is invoked):
Hello:James
Bye:null

Is there anything I'm doing wrong?

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