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From "Costin Manolache" <>
Subject Re: Tomcat-Lite - part 1
Date Tue, 02 Sep 2008 15:20:07 GMT
On Tue, Sep 2, 2008 at 3:57 AM, Tim Funk <> wrote:

> Costin Manolache wrote:
> Cool. In a nutshell - I like all the ideas.
> But while I like the idea of ditching Valves/LifecycleListeners - how does
> this work when the component needs to work across multiple ServletContext's?
> The only reason I see that Valves/LifecycleListeners need to yet exist is to
> handle those kind of issues.  Examples: AccessLogValve or any Valve which
> needs to act on an the entire Container or a single virtual host.

Using Filter interface doesn't mean we need to restrict it to a single
ServletContext or not have access to internal objects,
it should be possible to set them at container level. In tomcat-lite I tried
either using the ROOT context, or using a super-context
that comes before root - the filter chain in this context will replace the
existing catalina valve chain.

There is also a package - java/o.a.tomcat.servlets.addon ( like everything
else in tomcat-lite, name and interfaces are subject to review and
change ) with an attempt to abstract common interfaces that a filter could
use to get extra-access to the container internals.
The interfaces can be implemented by catalina, the new tomcat-lite - and
maybe other containers if the choose so.
Ideally, an extension will check if the container supports the extra
interfaces and if not degrade to single-context mode if not.


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