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In JSF 2.0 or later it is better to create a custom ResourceHandler wrapper and use FacesServlet instead. In that way, JSF will create FacesContext instance.

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We used several servlets and filters to drive external content into our JSF apps. In particular we use this approach to generate Jasper Reports, JFreeChart images and generate PDFs on the fly using iText. The same code is also used in a filter to manage sessions.

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This is simple to use and extend and, as I stated earlier, has been handed around several lists. We provide convienience methods for access to managed beans and to the Application. Concrete classes extend the base class and provide getters for session-managed components etc.

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In closing, I'm sure there may be better ways for doing this but more importantly, there are probably good reasons for not doing this at all and changing to Phase Listeners and staying within the JSF framework which I think is an important topic for continued discussion.

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