hi, folks
Intro
as i could not make JSPEngine working under WLS6.1,
i choose a different approach which is more general and
ASFAIK servlet 2.3 conformant.
I implemented a servlet 2.3 filter CocoonFilterGeneratorImpl.
This filter processes all entries of the filter chain first, and
save the response in a local response.
As final step a cocoon servlet instance services the
original request, having the local response as request-attribute.
A RequestAttributeGenerator pipes the value of the request-attribute
into the Cocoon pipeline.
RequestAttributeGenerator is more or less like StreamGenerator.
The cocoon servlet instance uses the original response for sending
response to the client.
As a consequence each filter instance initializes/destroyes its own
cocoon servlet instance.
Now this kind of approach is not limited to processing JSP, but you may
define any servlet, or other filters as pre-processing steps of this filter.
I think this is the only Servlet 2.3 conformant way to process JSP
output in Cocoon.
Names & Commits
I will commit the filter as
org.apache.cocoon.servlet.CocoonFilterGeneratorImpl,
and org.apache.cocoon.generation.RequestAttributeGenerator into scratchpad.
Moreover CocoonFilterGeneratorImpl explains how-to setup your web.xml,
and your
sitemap.xmap.
Configuration snippet for web.xml
...
<filter>
<filter-name>CocoonFilterGenerator</filter-name>
<display-name>CocoonFilterGenerator</display-name>
<description>Run JSP/Servlet processing before feeding into
Cocoon</description>
<filter-class>org.apache.cocoon.servlet.CocoonFilterGeneratorImpl</filter-class>
<init-param>
<param-name>cocoon-servlet-class-name</param-name>
<param-value>org.apache.cocoon.servlet.CocoonServlet</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CocoonFilterGenerator</filter-name>
<url-pattern>*.jsp</url-pattern>
</filter-mapping>
<servlet>
...
<!--
<servlet-mapping>
<servlet-name>Cocoon2</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>
-->
Note by default jsp files are handled by the JSP servlet.
Cocoon servlet does not need to get mapped to *.jsp anymore.
Configuration snippet for sittemap.xmap:
...
<map:match pattern="docs/samples/jsp/*">
<map:generate type="req-attr"/>
<!--map:generate src="docs/samples/jsp/{1}.jsp" type="jsp"/-->
<map:transform src="stylesheets/page/simple-page2html.xsl">
<map:parameter name="view-source" value="docs/samples/jsp/{1}.jsp"/>
<!--
Run-time configuration is done through these
<map:parameter/> elements. Again, let's have a look at the
javadocs:
"[...] All <map:parameter> declarations will be made
available in the XSLT stylesheet as xsl:variables. [...]"
-->
</map:transform>
<map:transform type="log"/>
<map:serialize/>
</map:match>
...
Note: You must use the request URI, as matching is already done by the
servlet container,
thus the original sitemap JSP sample matching="jsp/*" will not work.
bye bernhard
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