variable on-exception handling

[pluimpje]

Hello,

If an error occurs I want to go back to the screen I came from and display the error on it in a special format.
transforming error into usable beans works. (done in a listener exceptionThrown method)
putting the state to go to in requestScope also works (done also in a listener).

redirecting to this scope does not work. webflow won't resolve the ${...} in the to of the transition. The error states that state ${...} is not found in the list of possible states.

the system of using ${...} in to works for a normal transition.

Is there something I'm missing?

<global-transitions>
<!-- this works -->
<transition on="reload" to="${flashScope.reloadTo}" />
<!-- this does not -->
<transition on-exception="java.lang.Exception" to="${requestScope.reloadTo}" />
</global-transitions>

hans

[Rossen Stoyanchev]

It seems on-exception does not resolve transitions dynamically. You could go to an action state (e.g. "backToLastViewState") and transition from it to the last view state. It sounds you've a listener to keep track of the last view state. If not check this:
http://opensource.atlassian.com/proj...browse/SWF-238

[pluimpje]

Thank you,

I applied following sollution:

* I used the listener you said (already had it for other reasons) http://opensource.atlassian.com/proj...browse/SWF-238

* added the following to global-transitions

<transition on-exception="java.lang.Exception" to="backToLastViewState" />

* added following state to the flow

<decision-state id="backToLastViewState">
    <if test="${flowScope.previousViewStateId == null}" then="defaultState"
            else="${flowScope.previousViewStateId}" />
</decision-state>

Where 'defaultState' is the state to go to when an error occurred before the first view state is shown.

I think this is a quite proper solution to redirect a user to the screen he came of when an error occurres.

hans

[klr8]

It seems on-exception does not resolve transitions dynamically.

That's an oversight. I've created a JIRA issue:
http://opensource.atlassian.com/proj...browse/SWF-269

Erwin

[klr8]

This was indeed an issue. It's fixed now and will be released with SWF 1.0.2.

Erwin

[strider]

Thank for fixing this issue! Need an update soon.