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Posted to users@cocoon.apache.org by Jörn Nettingsmeier <ne...@apache.org> on 2006/10/14 15:22:12 UTC

inner functions and continuations...

hi everyone!


i'm trying to add local functions to a flowscript in order to make it 
more maintainable.

the code looks like this:

      function executeUsecase() {

        var someLocalVar;

        function foo() {
          ...
        }

        foo();
        sendPageAndWait("/some/pipeline");
        foo();
      }


the second call to "foo" results in an error ("foo is undefined").
so it appears that those functions are not stored with the continuation. 
is this expected behaviour?

so i changed the function declaration to

        var foo = function() {
            ...
        }

it seems to work - the function is still available after the 
continuation. is this the correct approach?

for the record, i'm using cocoon 2.1 (svn HEAD) with sun java 1.5 on 
linux/x86_64.


regards,

jörn




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RE: inner functions and continuations...

Posted by Geert Josten <ge...@daidalos.nl>.
I am not sure, but I somehow recall that the execution thread is not literally saved, but that the variables in the context are saved and restored and that the function is re-executed, but with a special flag that makes it jump to the position where the previous request left off..

So I think saving the function in a (local) variable is sensible.

Kind regards,
Geert

> 
   
 
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> Van: Jörn Nettingsmeier [mailto:nettings@apache.org] 
> Verzonden: zaterdag 14 oktober 2006 15:22
> Aan: users@cocoon.apache.org
> Onderwerp: inner functions and continuations...
> 
> hi everyone!
> 
> 
> i'm trying to add local functions to a flowscript in order to 
> make it more maintainable.
> 
> the code looks like this:
> 
>       function executeUsecase() {
> 
>         var someLocalVar;
> 
>         function foo() {
>           ...
>         }
> 
>         foo();
>         sendPageAndWait("/some/pipeline");
>         foo();
>       }
> 
> 
> the second call to "foo" results in an error ("foo is undefined").
> so it appears that those functions are not stored with the 
> continuation. 
> is this expected behaviour?
> 
> so i changed the function declaration to
> 
>         var foo = function() {
>             ...
>         }
> 
> it seems to work - the function is still available after the 
> continuation. is this the correct approach?
> 
> for the record, i'm using cocoon 2.1 (svn HEAD) with sun java 
> 1.5 on linux/x86_64.
> 
> 
> regards,
> 
> jörn
> 
> 
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
> For additional commands, e-mail: users-help@cocoon.apache.org
> 
>

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