Gauge (MicroProfile Metrics API)

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 Number>
extends Metric
```
A gauge metric is an instantaneous reading of a particular value. To instrument a queue's depth, for example:
```
 
 final Queue<String> queue = new ConcurrentLinkedQueue<String>();
 final Gauge<Integer> queueDepth = new Gauge<Integer>() {
     public Integer getValue() {
         return queue.size();
     }
 };
 
 
```

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  T getValue()
  Returns the metric's current value.

- Method Detail
  - getValue
```
T getValue()
```
    Returns the metric's current value.
    
    Returns:
    
    the metric's current value