Error while accessing cache through wrapper

[madhavsapre]

Hi,
I have configured JBoss Cache 2.0 to run as MBean in JBoss AS 4.05 as follows in the jboss-service.xml

mbean code="org.jboss.cache.pojo.jmx.PojoCacheJmxWrapper" name="jboss.cache:service=POJOCache"


In my code, I try to get reference to the POJOCache as follows.

server = MBeanServerLocator.locateJBoss();
cacheWrapper = (org.jboss.cache.jmx.CacheJmxWrapperMBean) MBeanProxyExt.create(CacheJmxWrapperMBean.class, "jboss.cache:service=POJOCache", server);

CacheStatus status = cacheWrapper.getCacheStatus();
System.out.println("Cache Status is " + status);
cache = (PojoCache)cacheWrapper.getCache();

I see from the log that MBean gets deployed without any exception. Also, the CacheStatus is shown as STARTED. But when getCache() method is called on the cacheWrapper, I get following exception

Exception occurred during cache initialization Unable to find operation getCache()
2007-07-03 13:04:31,765 ERROR [RMI TCP Connection(2)-172.26.41.141]
[STDERR] LoggerStream.java:write():152 java.lang.IllegalArgumentException: Unable to find
operation getCache()
2007-07-03 13:04:31,812 ERROR [RMI TCP Connection(2)-172.26.41.141] [STDERR]
LoggerStream.java:write():152 at org.jboss.mx.server.AbstractMBeanInvoker.invo
ke(AbstractMBeanInvoker.java:231)

Can anybody help me understand why I'm getting this exception? I checked API documentation @ http://labs.jboss.com/file-access/default/members/jbosscache/freezone/docs/2.0.0.CR2/api/index.html

and found the operation defined on the CacheJmxWrapperMBean interface.

[brian.stansberry]

You registered a PojoCacheJmxWrapper, not a CacheJmxWrapper.

You need to do this:

cacheWrapper = (PojoCacheJmxWrapperMBean) MBeanProxyExt.create(PojoCacheJmxWrapperMBean.class, "jboss.cache:service=POJOCache", server);
CacheStatus status = cacheWrapper.getCacheStatus();
System.out.println("Cache Status is " + status);
cache = cacheWrapper.getPojoCache();

BTW, you can never cast from Cache to PojoCache.

[madhavsapre]

Thanks a lot.
It worked.