Ivan Lou

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since Oct 08, 2008
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Recent posts by Ivan Lou

Tim Holloway wrote:Yes and no. It depends on how "single" you want it.

An application-scope managed bean is truly single. Only one of them per copy of the deployed webapp per server VM.

A session-scope managed bean is singleton on a per-user basis, but with multiple users, each user gets a unique and separate bean instance.

A request-scope bean is singleton on a per-request basis, but there can be lots of requests.

The "single"-ness of managed beans is determined by the fact that each bean ID in faces-config must be unique, so only one bean with that ID may exist in the context of its defined scope.

Only application scope is really singleton, the rest, like I said are unique, but only withing their contexts.



Thank you, Tim Holloway.
15 years ago
JSF
I'm beginner of learning jsf. I want to know whether the managed bean is singleton
15 years ago
JSF