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From Jesper Rasmussen ...@weburb.net>
Subject caching
Date Fri, 30 Nov 2001 13:18:05 GMT
Hi all,
I have a system where i have a servlet generating xml from some ejb's
I use cocoon to apply xsl to the xml and produce the various outputs.
I have tried two methods, and both works fine, but i need to cache the
result ans the servlet is QUITE slow and rarely changes its output.

i have tried this:

  <map:match pattern="test">
    <map:generate src="http://server/genXML"/>
    <map:transform src="stylesheets/transform.xsl"/>
    <map:serialize/>
   </map:match>

and this
  <map:match pattern="readXML">
    <map:read src="http://server/genXML"  mime-type="text/xml"/>
   </map:match>

  <map:match pattern="test2">
    <map:generate src="readXML"/>
    <map:transform src="stylesheets/transform.xsl"/>
    <map:serialize/>
   </map:match>

as stated it all work fine but is not cached as far as i can tell.
Is there a way for me to monitor the cache. but im quite sure it is not
cached as it is still very slow.

I have striped my sitemap.xmap to the minimum and is deploying the
application with all the libs from cocon. so im not as such using
cocoon.war

I guess my problem is that i need something more in either sitemap og
xconf

sitemap:

 <map:components>

  <map:generators default="file">
   <map:generator  name="file"
src="org.apache.cocoon.generation.FileGenerator"
                   pool-max="32" pool-min="16" pool-grow="4"/>
  </map:generators>

  <map:transformers default="xslt">
   <map:transformer     name="xslt"
src="org.apache.cocoon.transformation.TraxTransformer"
                        pool-max="32" pool-min="16" pool-grow="4">
    <use-store>true</use-store>
    <use-request-parameters>false</use-request-parameters>
    <use-browser-capabilities-db>false</use-browser-capabilities-db>
   </map:transformer>
  </map:transformers>

  <map:readers default="resource">
   <map:reader name="resource"
src="org.apache.cocoon.reading.ResourceReader"/>
  </map:readers>

  <map:serializers default="html">
      <map:serializer  name="html"
       mime-type="text/html"
      src="org.apache.cocoon.serialization.HTMLSerializer"/>
      </map:serializer>
  </map:serializers>

and the pipline with the above lines.


in cocoon.xconf i have:

  <stream-pipeline
class="org.apache.cocoon.components.pipeline.CachingStreamPipeline"
                   pool-max="32" pool-min="16" pool-grow="4"/>

  <stream-cache
class="org.apache.cocoon.components.store.MRUMemoryStore">
     <parameter name="freememory" value="1000000"/>
     <parameter name="heapsize" value="60000000"/>
     <parameter name="cleanupthreadinterval" value="10"/>
     <parameter name="maxobjects" value="100"/>
     <parameter name="usecleanupthread" value="true"/>
     <parameter name="threadpriority" value="5"/>
     <parameter name="filesystem" value="true"/>
  </stream-cache>


  <event-pipeline
class="org.apache.cocoon.components.pipeline.CachingEventPipeline"
                   pool-max="32" pool-min="16" pool-grow="4"/>

  <event-cache
class="org.apache.cocoon.components.store.MRUMemoryStore">
     <parameter name="freememory" value="1000000"/>
     <parameter name="heapsize" value="60000000"/>
     <parameter name="cleanupthreadinterval" value="10"/>
     <parameter name="maxobjects" value="100"/>
     <parameter name="usecleanupthread" value="true"/>
     <parameter name="threadpriority" value="5"/>
     <parameter name="filesystem" value="true"/>
  </event-cache>

I have read the docs on caching, an i think what i do is right, but i
dont quite understand the xmlserilization part, but i have tried to
include
<xml-serializer
    class="org.apache.cocoon.components.sax.XMLByteStreamCompiler"/>

<xml-deserializer
    class="org.apache.cocoon.components.sax.XMLByteStreamInterpreter"/>

but to no avail.

The bedst would be if it was cached at the html setilization step, but
at xml generation step would be ok. I have also tried to generate the
xml with generate / xml seriliaze instead of read.

Thanks alot for any inputs. Thanks.
I really hope to solve this, as the system cant go live till i have
solved the performance problem.

thanks again
Jesper



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