At 3:03 PM +0100 12/5/05, Nicolas De Loof wrote:
Hello,
I'm using token to avoid multiple submits in this flow :
"/commande.do" creates an empty form-bean, saves a token and
forwards to "tile:commande.new"
"/commande/create.do" checks for token and creates datas in the database.
If an exception occurs, an exceptionHandler is used to display an
error message. I'm using it to catch Data integrity exception when
user try to create an allready-existing entry. In this case, no
token is saved anymore and user cannot change it's input and
resubmit.
How can I setup struts to have a new token beeing saved when an
exception occurs, to allow the user to correct the form and submit ?
The easiest thing I can think of would be to drop the declarative
exception handling; catch the exception in the action mapped to
/commande/create.do instead, where you can save a new token and
return the user to "tile:commande.new".
Of course, you could extend the base ExceptionHandler, perhaps adding
a configuration element that tells it to reset the token when the
config is in a certain state. In Struts 1.2 you can extend
ExceptionConfig and add arbitrary bean properties like you might with
ActionMapping, and in Struts 1.3 ExceptionConfig participates in the
arbitrary property-map model so that you don't even need to extend
it. But I think that may be too much behavior for an exception
handler. I am not inclined to use exceptions to route control flow.
Joe
Nico.
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Joe Germuska
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