title: Ehcache with tomcat simple example
body: <p>I want to include Ehcache in a Java web application hosted in Tomcat. What I want to do is check  my cache for a key and if the key exists then retrieve it, if not then add it to the cache for later retrieval (just like the memcached usage scenario).</p>
  
  <p>I searched the documentation and couldn't find useful information on how to implement this simple example. I only found out that I need to put ehcache-core.jar and slf4j*.jar in my classpath along with ehcache.xml. Then what ? I can see an Ehcache cache object in the examples - but where should I instantiate that in order to be accessible from my servlets / JSPs ? Also, can you recommend a very simple cache configuration to put in ehcache.xml ? Is the default </p>
  
  <pre>
      &lt;defaultCache
             maxEntriesLocalHeap="0"
             eternal="false"
             timeToIdleSeconds="1200"
             timeToLiveSeconds="1200"&gt;
      &lt;/defaultCache&gt;
  </pre>
  
  <p>ok ?</p>