I have purchased the book Tomcat: The Definitive Guide. (Tomcat 6.0 2nd Edition)
I believe it is missing mention of a useful Tomcat configuration setting:
It does not mention the use of the crossContext="true/false" switch which can be used in the Tomcat server.xml file Host Context, to allow cross-context use of resources. For instance, crossContext must be set to "true" if you need to specify an external context in the c:import JSTL tag used in JSP pages.
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Thanks for your feedback regarding the missing Tomcat configuration setting: crossContext="true/false".
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There are a couple included references to CrossContex, but I'm sure listing this in an index would be helpful.
add a few lines to the server.xml configuration file:...
pg 277 Table 7-8
crossContext Should ServletContext.
getContext("otherWebApp") succeed (true) or return null (false).
false, for generally good security reasons.a
Tomcat: The Definitive Guide, 2E
O'Reilly Media Inc.