Configuring Servlet Result Cache

Question

Greetings.
I am trying to configure the iAS servlet result cache feature under iAS 6.0 SP2. I have the following entry for a servlet in my ias-web.xml file:
<servlet>
<servlet-name>MessageRouter</servlet-name>
<guid>{CAC10848-06B4-1C5F-848B-08002085745B}</guid>
<validation-required>false</validation-required>
<servlet-info>
<sticky>false</sticky>
<encrypt>false</encrypt>
<number-of-singles>10</number-of-singles>
<disable-reload>false</disable-reload>
</servlet-info>
     <caching>
          <cache-timeout>300</cache-timeout>
          <cache-size>10</cache-size>
          <cache-criteria>Xml</cache-criteria>
          <cache-option>TIMEOUT_LASTACCESS</cache-option>
     </caching>
</servlet>
However, it does not appear to be caching the results of this servlet because my request takes about 10 seconds to run (it's a database query). I would expect that subsequent requests would return results much faster than 10 seconds if the servlet results are in fact cached.
So, I am hoping that someone can help me with the following questions:
1. An example ias-web.xml with a cached servlet.
2. Any instructions on how to monitor from iASTAT or logs or something so I can see that the servlet result is read from iAS cache.
Thanks
Jeffery Cann

Answer 1

Check out the samples included with the appserver. There is a servlet caching sample that includes four different examples of deployment descriptors.
Here is the servlet tag from the default:
<servlet>
<servlet-name>ServCache</servlet-name>
<guid>{DD6402C6-CC11-1AA1-CF6F-080020CFEAC8}</guid>
<validation-required>false</validation-required>
<error-handler></error-handler>
<servlet-info>
<sticky>true</sticky>
<encrypt>false</encrypt>
<number-of-singles>10</number-of-singles>
<disable-reload>false</disable-reload>
<caching>
<cache-timeout>900</cache-timeout>
<cache-size>64</cache-size>
<cache-criteria>inputtext</cache-criteria>
<cache-option>TIMEOUT_CREATE</cache-option>
</caching>
</servlet-info>
</servlet>
The KXS log (assuming that you have info messages) will report servlet cache hits.
David
Shameless plug for my iAS book : http://www.amazon.com/exec/obidos/ASIN/076454909X/
P.S.
I just realized that the caching sample was only added in sp3. Even if you don't upgrade your server (the functionality is unchanged) you may want to download sp3 so that you can check out the sample. The sample goes into a reasonable amount of depth about this feature.