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POExposing Hibernate (cache) statistics through JMX with Spring in Tomcat
 

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    <p>Collecting Hibernate/Ehcache statistics and exposing them through JMX in Spring-based setups seems easy. The Internet has lots of resources that help e.g. <a href="http://snippets.dzone.com/posts/show/11159" rel="nofollow">http://snippets.dzone.com/posts/show/11159</a></p> <p>However, all those articles assume one is working with a Hibernate session factory of some sort. I'm not - my entities are JPA annotated and I use a <code>javax.persistence.EntityManager</code>. If I were deploying to a Java EE container I might have been able to obtain a Hibernate session factory through JNDI as described here <a href="http://internna.blogspot.com/2007/08/hibernate-statistics-in-enterprise-5.html" rel="nofollow">http://internna.blogspot.com/2007/08/hibernate-statistics-in-enterprise-5.html</a> but I'm on Tomcat...</p> <p>How to go about this? I haven't come up with a solution yet.</p> <p>If I had a reference to the Ehcache <code>CacheManager</code> I could try something like:</p> <pre><code>&lt;context:mbean-server /&gt; &lt;bean class="net.sf.ehcache.management.ManagementService" init-method="init"&gt; &lt;constructor-arg ref="..myCacheManager.."/&gt; &lt;constructor-arg ref="mbeanServer"/&gt; &lt;constructor-arg value="true"/&gt; &lt;constructor-arg value="true"/&gt; &lt;constructor-arg value="true"/&gt; &lt;constructor-arg value="true"/&gt; &lt;/bean&gt; </code></pre> <p>Since the cache manager is created by Hibernate (i.e. it's not a Spring bean) it won't work. I tried replacing that ref with </p> <pre><code>&lt;constructor-arg&gt;&lt;bean id="cacheManager" class="net.sf.ehcache.CacheManager" factory-method="getInstance"/&gt;&lt;/constructor-arg&gt; </code></pre> <p>hoping I'd somehow catch the right instance. Won't work either as this would in fact create a new cache manager instance.</p>
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    1. USArjan Tijms
    1. USMarcel Stör
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    1. COWhat version of EhCache are you using? I see no `getInstance()` method on `CacheManager`.
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      1. USskaffman
    2. CO@skaffman, it's in ehcache-core 2.3.1.
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      1. USMarcel Stör
 

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