Hi Lloyd,
It's part of our monitoring design. All the stats are retrieved from a
TreeNode structure. I'm creating a MethodInvoker TreeNode
"loadedClassCount" so that getLoadedClassCount() will get invoked and
return a value when a client asks for node.getValue().
TreeNode tn = TreeNodeFactory.createMethodInvoker(nodeName, clBean,
"jvm", method);
public static TreeNode createMethodInvoker (String name, Object instance,
String category, Method m){
I don't want to store the clBean.getLoadedClassCount() on the treeNode
as it is because that value is dynamic.
Jennifer
Lloyd Chambers wrote:
> Jennifer,
>
> Why are you introspecting the method?
>
> java.lang.management.ClassLoadingMXBean clBean =
> ManagementFactory.getClassLoadingMXBean();
> int count = clBean.getLoadedClassCount();
>
> ?
>
> Lloyd
>
>
>
> On Sep 4, 2008, at 4:17 PM, Jennifer Chou wrote:
>
>> Hi,
>>
>> I'm trying use method.invoke(..) on the MXBeans but I'm getting
>> IllegalAccessException on some but not all the MXBeans. Anybody know
>> why? And how to get around this problem?
>>
>> java.lang.management.ClassLoadingMXBean clBean =
>> ManagementFactory.getClassLoadingMXBean();
>> java.lang.reflect.Method method =
>> clBean.getClass().getMethod("getLoadedClassCount", (Class[]) null);
>> method.invoke(clBean, (Object[]) null);
>>
>> These get IllegalAccessException:
>> ClassLoadingMXBean
>> CompilationMXBean
>> GarbageCollectorMXBean
>> MemoryMXBean
>> MemoryMXBean
>>
>> These allow me to use method.invoke():
>> OperatingSystemMXBean
>> MemoryUsage
>>
>> Jennifer
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: admin-unsubscribe_at_glassfish.dev.java.net
>> For additional commands, e-mail: admin-help_at_glassfish.dev.java.net
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: admin-unsubscribe_at_glassfish.dev.java.net
> For additional commands, e-mail: admin-help_at_glassfish.dev.java.net
>