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Q: 

Long poll for JSF - what are the choices?

I need to implement long-poll for a notification system, I current using Primefaces ajax framework but currently does not support long poll. I just wondering what is available for JSF developer if they want to implement long poll? Another question: between long poll and web push, for notification system, which one is prefer?

Note: I am using JSF 2.0, Java EE 6 and Glassfish 3.0.1

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