private Object invoke(final ObjectName objectName, final String method)
      throws InstanceNotFoundException, IOException, MBeanException, ReflectionException {
    return server.invoke(objectName, method, PARAMS, SIGNATURE);
  }
Invokes an operation on the specified MBean.

@param objectName identifies the MBean
@param method the name of the operation method invoke

@return the result of invoking the operation on the MBean specified or null

@throws InstanceNotFoundException if the specified MBean is not registered in the MBean server
@throws IOException if a communication problem occurred when talking to the MBean server
@throws MBeanException if the MBean operation throws an exception
@throws ReflectionException if the MBean does not have the specified operation
geode-core/src/main/java/org/apache/geode/internal/process/MBeanProcessController.java