@Retention(value=RUNTIME) @Target(value={FIELD,METHOD}) public @interface Probe
MetricsRegistry.scanAndRegister(Object, String)
is called.
The MetricsRegistry will automatically scan all interfaces and super classes of an object (recursively). So it is possible to define a Probe on e.g. an interface or an abstract class.
Field
provides access to the actual field
without the need for autoboxing. With the Method
a wrapper object is created when a primitive is returned by the method.
Therefore, fields produce less garbage than methods.
A Probe can be placed on fields or methods with the following (return) type:
AtomicInteger
AtomicLong
Counter
Byte
Short
Integer
Float
Double
Collection
: it will return the sizeMap
: it will return the sizeSemaphore
: it will return the number of
available permitspublic abstract String name
public abstract ProbeLevel level
public abstract ProbeUnit unit
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