[jira] Updated: (TAP5-44) enable creation of custom "onException" event handler

["Howard M. Lewis Ship (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-44?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship updated TAP5-44:
-------------------------------------

    Issue Type: Improvement  (was: Bug)

> enable creation of custom "onException" event handler
> -----------------------------------------------------
>
>                 Key: TAP5-44
>                 URL: https://issues.apache.org/jira/browse/TAP5-44
>             Project: Tapestry 5
>          Issue Type: Improvement
>    Affects Versions: 5.0.15
>            Reporter: Kristian Marinkovic
>
> make it possible to create custom "onException" event handler that are fired when custom Exceptions are thrown.
> i have the use case saying, that when an optimistic lock exception is thrown the same page with the newly loaded entity and an error message has to be displayed. Although it is possible to use the "onException" event it would be much nicer to have a "onExceptionFromOptimisticLocking" exception where the developer can put the exception handling into this specific method. In the near future we will have multiple other exceptions that need to be handled in a similar way. 
> i prefer specific event handler to a bunch of instanceof  statements 

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