Spring Ehcache MBean Monitoring

Question

I am using Spring 4.0.3.RELEASE and EHcache 2.8.1. on JBoss 7.1.1

With the following configuration in applicationContext.xml my caching is working good.

<cache:annotation-driven/>

<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
   <property name="cacheManager" ref="ehcache"/>
</bean>

<bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
   <property name="configLocation" value="/WEB-INF/ehcache.xml"/>
</bean>

Now I want to add the monitoring capabilities with MBean. I changed the configuration in applicationContext.xml as follows – added 2 new beans “managementService” and “mbeanServer”, no other change. This is the current configuration.

<cache:annotation-driven/>

<bean id="managementService"
        class="net.sf.ehcache.management.ManagementService"
        init-method="init"
        destroy-method="dispose">

        <constructor-arg ref="cacheManager"/>
        <constructor-arg ref="mbeanServer"/>
        <constructor-arg index="2" value="true"/>
        <constructor-arg index="3" value="true"/>
        <constructor-arg index="4" value="true"/>
        <constructor-arg index="5" value="true"/>
 </bean>

<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
   <property name="cacheManager" ref="ehcache"/>
</bean>

<bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
   <property name="configLocation" value="/WEB-INF/ehcache.xml"/>
</bean>    

<bean id="mbeanServer" class="org.springframework.jmx.support.MBeanServerFactoryBean">
    <property name="locateExistingServerIfPossible" value="true"/>
</bean>

With this configuration I get the following error on application server start up.

14:05:32,208 ERROR [org.springframework.web.context.ContextLoader] (MSC service thread 1-1) Context initialization failed: org.springframework.beans.factory.UnsatisfiedDependencyException: **Error creating bean with name 'managementService'** defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Unsatisfied dependency expressed through constructor argument with index 0 of type [net.sf.ehcache.CacheManager]: Could not convert constructor argument value of type [org.springframework.cache.ehcache.EhCacheCacheManager] to required type [net.sf.ehcache.CacheManager]: Failed to convert value of type 'org.springframework.cache.ehcache.EhCacheCacheManager' to required type 'net.sf.ehcache.CacheManager'; nested exception is java.lang.IllegalStateException: **Cannot convert value of type [org.springframework.cache.ehcache.EhCacheCacheManager] to required type [net.sf.ehcache.CacheManager]**: no matching editors or conversion strategy found

Related cause: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'managementService' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Unsatisfied dependency expressed through constructor argument with index 0 of type [net.sf.ehcache.CacheManager]: Could not convert constructor argument value of type [org.springframework.cache.ehcache.EhCacheCacheManager] to required type [net.sf.ehcache.CacheManager]: Failed to convert value of type 'org.springframework.cache.ehcache.EhCacheCacheManager' to required type 'net.sf.ehcache.CacheManager'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.cache.ehcache.EhCacheCacheManager] to required type [net.sf.ehcache.CacheManager]: no matching editors or conversion strategy found

Answer 1

You should pass the ehcache bean to the constructor of the managementService bean not cacheManager. If you look at the definition of cacheManager the ehcache bean is passed as cacheManager. The factory bean will provide an instance of net.sf.ehcache.CacheManager.