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From "Grzegorz Kossakowski (JIRA)" <>
Subject [jira] Commented: (COCOON-2044) servlet: protocol URIs have to be globally unique for use as cache-keys
Date Thu, 19 Apr 2007 15:35:15 GMT


Grzegorz Kossakowski commented on COCOON-2044:


I'm glad to see that you still investigate this issue but I fear that you try to fix in wrong
way and I guess it's my fault. In my humble opinion, we don't need to perform so significant
changes in servlet-service that you propose.
Servlets can still be resovled by their shorthand names, only getURI() method need to be changed
so it returns "absolute" URIs instead of "relative" (containing shorthand names). This way,
everything should work correctly because only value returned by getURI() method must be unique.

> servlet: protocol URIs have to be globally unique for use as cache-keys
> -----------------------------------------------------------------------
>                 Key: COCOON-2044
>                 URL:
>             Project: Cocoon
>          Issue Type: Bug
>          Components: - Servlet service framework
>    Affects Versions: 2.2-dev (Current SVN)
>            Reporter: Alexander Klimetschek
>         Assigned To: Grzegorz Kossakowski
>            Priority: Critical
> All servlet protocol URIs like servlet:/some/thing or servlet:super:/foo/bar or servlet:myblock:/another/path
have to be globally unique because they are used in the cache, of which there is only one
global with globally acting keys.
> There are two caches in standard Cocoon configuration (the only ones I know of ;-), both
with a different key generation. Here are ideas how to make the keys global:
> a) EHDefaultStore for caching resources of caching pipelines: they use the uriPrefix
of the Enviroment in the key, so providing a uriPrefix (eg. the mount path of the servlet)
works here.
> b) DefaultTransientStore which caches XSLT and JX generator sources (don't know why this
is different from a)): they do not use the uriPrefix and much worse, they need correct URIs
because they are read by the XSLT processor, who does not like things like servlet:uniqueID34:/xsl/stylesheet.xsl
containing arbitrary schemes at the beginning. Appending an ID via a query parameter seems
the only working solution (tried it already): servlet:/xsl/stylesheet.xsl?servlet-services-id=12345
> Another solution would be to have one cache per sitemap, so that the keys don't have
to be unique anymore. But I don't know how to configure that and if this is feasible.

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