Metric

```
@Retention(value=RUNTIME)
 @Target(value={METHOD,FIELD,PARAMETER,ANNOTATION_TYPE})
public @interface Metric
```
An annotation requesting that a metric be injected or registered. The metric will be registered in the application MetricRegistry. Given an injected field annotated with @Metric like this:
```
      @Inject
      @Metric(name="histogram")
     public Histogram histogram;
 
```
A meter of the field's type will be created and injected into managed objects. It will be up to the user to interact with the metric. This annotation can be used on fields of type Meter, Timer, Counter, and Histogram.
This may also be used to register a metric.
```
      @Produces
      @Metric(name="hitPercentage")
      @ApplicationScoped
     Gauge<Double> hitPercentage = new Gauge<Double>() {
 
        @Override
       public Double getValue() {
           return hits / total;
       }
     };
 
```
Examples (en):

mp-metrics-histogram

Examples (es):

mp-metrics-histogram

Examples (pt):

mp-metrics-histogram

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element and Description
`boolean`	`absolute` Denotes whether to use the absolute name or use the default given name relative to the annotated class.
`java.lang.String`	`description` The description of the metric.
`java.lang.String`	`displayName` The display name of the metric.
`java.lang.String`	`name` The name of the metric.
`java.lang.String[]`	`tags` The tags of the metric.
`java.lang.String`	`unit` The unit of the metric.

- Element Detail
  - name
```
public abstract java.lang.String name
```
    The name of the metric.
    
    Returns:
    
    The name of the metric.
    
    Default:
    
    ""
- - tags
```
public abstract java.lang.String[] tags
```
    The tags of the metric.
    
    Returns:
    
    The tags of the metric. Each String tag must be in the form of 'key=value'. If the input is empty or does not contain a '=' sign, the entry is ignored.
    
    See Also:
    
    Metadata
    
    Default:
    
    {}
- - absolute
```
public abstract boolean absolute
```
    Denotes whether to use the absolute name or use the default given name relative to the annotated class.
    
    Returns:
    
    If true, use the given name as an absolute name. If false (default), use the given name relative to the annotated class.
    
    Default:
    
    false
- - displayName
```
public abstract java.lang.String displayName
```
    The display name of the metric.
    
    Returns:
    
    The display name of the metric.
    
    See Also:
    
    Metadata
    
    Default:
    
    ""
- - description
```
public abstract java.lang.String description
```
    The description of the metric.
    
    Returns:
    
    The description of the metric.
    
    See Also:
    
    Metadata
    
    Default:
    
    ""
- - unit
```
public abstract java.lang.String unit
```
    The unit of the metric.
    
    Returns:
    
    The unit of the metric. By default, the value is MetricUnits.NONE.
    
    See Also:
    
    Metadata, MetricUnits
    
    Default:
    
    "none"

Annotation Type Metric

Optional Element Summary

Element Detail

name

tags

absolute

displayName

description

unit