Hello Dan,
>
> Hi!
>
> I have been trying for a few days now to find out where (and
> if) Cocoon persists
> the cached XML chunks obtained from pipelines. Almost all of
> the pipelines I've
> written implement CacheableProccessingComponent.
You mean all your compoments in a pipeline implement
CacheableProccessingComponent. If one does not,
your cocoon caches untill the first not cacheable transformer (if the generator
does not cache,
nothing gets cached. Also, implementing CacheableProccessingComponent is no
garantuee for a proper working
cache of your component. The cachekey and validity object do have to make
sense! [1] )
> I read
> something about a
> <persistent-store> tag in cocoon.xconf, but I didn't
> understand much.
A persistent-store...just to be sure, means that you want a cache that is
persistent between JVM restarts, right? If you are using EHCache,
you can see in this code snippet where it stores the cached responses (if you
use EHCache):
try {
if (parameters.getParameterAsBoolean("use-cache-directory", false))
{
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("Using cache directory: " + cacheDir);
}
setDirectory(cacheDir);
}
else if (parameters.getParameterAsBoolean("use-work-directory",
false)) {
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("Using work directory: " + workDir);
}
setDirectory(workDir);
}
else if (parameters.getParameter("directory", null) != null) {
String dir = parameters.getParameter("directory");
dir = IOUtils.getContextFilePath(workDir.getPath(), dir);
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("Using directory: " + dir);
}
setDirectory(new File(dir));
}
else {
try {
// Legacy: use working directory by default
setDirectory(workDir);
} catch (IOException e) {
}
}
} catch (IOException e) {
throw new ParameterException("Unable to set directory", e);
}
in cocoon.xconf, you can set in the ehcache store configuration, <parameter
name="diskpersistent" value="true"/>
> Can you
> please tell me how, or at least where is Cocoon persisting
> its cache and is
> there a way to redirect this persistence (say to a DB)?
To a DB....I would use a Cache which is capable of persisting in a DB (JCS can,
I suppose EHCache also)
>
> And another thing... Can you please tell me what parameters
> do I need to modify
> in order to temper with Cocoon's cache performance.
?? what do you mean? Anyway, the cache parameters are in cocoon.xconf in
<store>. You can find this on the wiki
>
> P.S. By Cocoon's cache, I understand cached versions of a XML
> generated
> response. Is this correct? Maybe I got it all wrong...
Hmmm, more or less you could see it that way (though it is more subtle, look at
CachedResponse if you want to know more...also look at your
localhost:port/status page to see which cachekeys are created)
>
> Many thanks!
Regards Ard
[1] http://cocoon.zones.apache.org/daisy/cdocs/g1/g1/g7/690.html
>
> Dan
>
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