Histogram.Child

java.lang.Object
- io.prometheus.client.Histogram.Child

Enclosing class:

Histogram
```
public static class Histogram.Child
extends java.lang.Object
```
The value of a single Histogram.
Warning: References to a Child become invalid after using SimpleCollector.remove(java.lang.String...) or SimpleCollector.clear().

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class Histogram.Child.Value

Field Summary

Fields
Modifier and Type Field Description

private DoubleAdder[] cumulativeCounts

private DoubleAdder sum

private double[] upperBounds

Constructor Summary

Constructors
Modifier Constructor Description

private Child(double[] buckets)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Histogram.Child.Value`	`get()`	Get the value of the Histogram.
`void`	`observe(double amt)`	Observe the given amount.
`Histogram.Timer`	`startTimer()`	Start a timer to track a duration.
`double`	`time(java.lang.Runnable timeable)`	Executes runnable code (e.g.
`<E> E`	`time(java.util.concurrent.Callable<E> timeable)`	Executes callable code (e.g.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - upperBounds
```
private final double[] upperBounds
```
  - cumulativeCounts
```
private final DoubleAdder[] cumulativeCounts
```
  - sum
```
private final DoubleAdder sum
```
- Constructor Detail
  - Child
```
private Child(double[] buckets)
```
- Method Detail
  - time
```
public double time(java.lang.Runnable timeable)
```
    Executes runnable code (e.g. a Java 8 Lambda) and observes a duration of how long it took to run.
    
    Parameters:
    
    timeable - Code that is being timed
    
    Returns:
    
    Measured duration in seconds for timeable to complete.
  - time
```
public <E> E time(java.util.concurrent.Callable<E> timeable)
```
    Executes callable code (e.g. a Java 8 Lambda) and observes a duration of how long it took to run.
    
    Parameters:
    
    timeable - Code that is being timed
    
    Returns:
    
    Result returned by callable.
  - observe
```
public void observe(double amt)
```
    Observe the given amount.
  - startTimer
```
public Histogram.Timer startTimer()
```
    Start a timer to track a duration.
    Call Histogram.Timer.observeDuration() at the end of what you want to measure the duration of.
  - get
```
public Histogram.Child.Value get()
```
    Get the value of the Histogram.
    Warning: The definition of Histogram.Child.Value is subject to change.