@Target(value=METHOD) @Retention(value=RUNTIME) public @interface MetricsValue
descriptor
 for a method on an MBean. The existence of this annotation on
 an MBean attribute indicates that the MBean attribute is mapped to
 a metrics value with the metrics name being value().
 By default, an MBean attribute is not mapped to a metrics value or
 MetricsTag.
 
 This annotation is only allowed to be put on MBean attribute type's of numeric primitives or numeric classes deriving from
 Number. Map non-numerics MBean attribute types to MetricsTag.
public static final String DEFAULT
@DescriptorKey(value="metrics.value") public abstract String value