Type Parameters:

T - the type of the metric's value. Must be numeric.

All Superinterfaces:

Metric

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Gauge<T extends java.lang.Number>
extends Metric

 
 final Queue<String> queue = new ConcurrentLinkedQueue<String>();
 final Gauge<Integer> queueDepth = new Gauge<Integer>() {
     public Integer getValue() {
         return queue.size();
     }
 };