UniformReservoir (Metrics Core 4.2.15 API)

java.lang.Object
- com.codahale.metrics.UniformReservoir

All Implemented Interfaces:

Reservoir
```
public class UniformReservoir
extends Object
implements Reservoir
```
A random sampling reservoir of a stream of longs. Uses Vitter's Algorithm R to produce a statistically representative sample.

See Also:

Random Sampling with a Reservoir

Constructor Summary

Constructors
Constructor	Description
`UniformReservoir()`	Creates a new `UniformReservoir` of 1028 elements, which offers a 99.9% confidence level with a 5% margin of error assuming a normal distribution.
`UniformReservoir(int size)`	Creates a new `UniformReservoir`.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Snapshot`	`getSnapshot()`	Returns a snapshot of the reservoir's values.
`int`	`size()`	Returns the number of values recorded.
`void`	`update(long value)`	Adds a new recorded value to the reservoir.

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

- Constructor Detail
  - UniformReservoir
```
public UniformReservoir()
```
    Creates a new UniformReservoir of 1028 elements, which offers a 99.9% confidence level with a 5% margin of error assuming a normal distribution.
  - UniformReservoir
```
public UniformReservoir(int size)
```
    Creates a new UniformReservoir.
    
    Parameters:
    
    size - the number of samples to keep in the sampling reservoir
- Method Detail
  - size
```
public int size()
```
    Description copied from interface: Reservoir
    
    Returns the number of values recorded.
    
    Specified by:
    
    size in interface Reservoir
    
    Returns:
    
    the number of values recorded
  - update
```
public void update(long value)
```
    Description copied from interface: Reservoir
    
    Adds a new recorded value to the reservoir.
    
    Specified by:
    
    update in interface Reservoir
    
    Parameters:
    
    value - a new recorded value
  - getSnapshot
```
public Snapshot getSnapshot()
```
    Description copied from interface: Reservoir
    
    Returns a snapshot of the reservoir's values.
    
    Specified by:
    
    getSnapshot in interface Reservoir
    
    Returns:
    
    a snapshot of the reservoir's values