I've committed a new filter dispatcher strategy that aims to:
* Make it crystal clear to users how to deploy Struts
* Make it crystal clear to developers what filters are doing what processes
* Better enable customizations and overrides by advanced users
This first cut is more about tackling the first two issues, and I'd
like to get some feedback on them. There are a number of tickets that
are caused by buggy and confusing filter dispatchers and their
deployments, as well as I have a need to have our dispatch process be
more flexible to support things like native operation in OSGi or in a
plugin system.
You'll notice that there is certainly more code in this new design,
however, I'm hoping it is self-documenting, brain-dead code that is
easier to read and follow. I've outlined how it would be used in the
package Javadocs:
Simple Dispatcher
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Deployment with Sitemesh
<filter>
<filter-name>struts2-prepare</filter-name>
<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareFilter</filter-class>
</filter>
<filter>
<filter-name>sitemesh</filter-name>
<filter-class>com.opensymphony.module.sitemesh.filter.PageFilter</filter-class>
</filter>
<filter>
<filter-name>struts2-execute</filter-name>
<filter-class>org.apache.struts2.dispatcher.filter.StrutsExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2-prepare</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>sitemesh</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>struts2-execute</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
So basically, a one-to-one, filter to usecase mapping. Please take a
look at the code as I'd like to get this finalized in the next few
days:
http://svn.apache.org/viewvc/struts/struts2/trunk/core/src/main/java/org/apache/struts2/dispatcher/filter/
Thanks,
Don
PS. We are 46% of the way to GA 2.1 release...
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