enable creation of custom "onException" event handler
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Key: TAPESTRY-2653
URL: https://issues.apache.org/jira/browse/TAPESTRY-2653
Project: Tapestry
Issue Type: Improvement
Components: tapestry-core
Affects Versions: 5.0.14
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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