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To Phase Listener or not to Phase Listener that is the question!

 
John Lark
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Hey Guys,

My latest Project is in JSF and involves a Phase Listener! My intention is that when I click on one of 4 buttons on the screen, its going to call the listener which is going to perform a function involving calling out to a service for information using an HTTP Protocal. Is a Phase Listener appropriate here? Is it possible to implement it to only one button?
 
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