Samplers

java.lang.Object
- io.opencensus.trace.samplers.Samplers

```
public final class Samplers
extends java.lang.Object
```
Static class to access a set of pre-defined Samplers.

Since:

0.5

Field Summary

Fields
Modifier and Type Field Description

private static Sampler ALWAYS_SAMPLE

private static Sampler NEVER_SAMPLE

Constructor Summary

Constructors
Modifier Constructor Description

private Samplers()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Sampler`	`alwaysSample()`	Returns a `Sampler` that always makes a "yes" decision on `Span` sampling.
`static Sampler`	`neverSample()`	Returns a `Sampler` that always makes a "no" decision on `Span` sampling.
`static Sampler`	`probabilitySampler(double probability)`	Returns a `Sampler` that makes a "yes" decision with a given probability.

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

- Field Detail
  - ALWAYS_SAMPLE
```
private static final Sampler ALWAYS_SAMPLE
```
  - NEVER_SAMPLE
```
private static final Sampler NEVER_SAMPLE
```
- Constructor Detail
  - Samplers
```
private Samplers()
```
- Method Detail
  - alwaysSample
```
public static Sampler alwaysSample()
```
    Returns a Sampler that always makes a "yes" decision on Span sampling.
    
    Returns:
    
    a Sampler that always makes a "yes" decision on Span sampling.
    
    Since:
    
    0.5
  - neverSample
```
public static Sampler neverSample()
```
    Returns a Sampler that always makes a "no" decision on Span sampling.
    
    Returns:
    
    a Sampler that always makes a "no" decision on Span sampling.
    
    Since:
    
    0.5
  - probabilitySampler
```
public static Sampler probabilitySampler(double probability)
```
    Returns a Sampler that makes a "yes" decision with a given probability.
    
    Parameters:
    
    probability - The desired probability of sampling. Must be within [0.0, 1.0].
    
    Returns:
    
    a Sampler that makes a "yes" decision with a given probability.
    
    Throws:
    
    java.lang.IllegalArgumentException - if probability is out of range
    
    Since:
    
    0.5