RowSampler (Apache Accumulo Core 2.0.1 API)

java.lang.Object
- org.apache.accumulo.core.client.sample.AbstractHashSampler
- - org.apache.accumulo.core.client.sample.RowSampler

All Implemented Interfaces:

Sampler
```
public class RowSampler
extends AbstractHashSampler
```
Builds a sample based on entire rows. If a row is selected for the sample, then all of its columns will be included.
To determine what options are valid for hashing see AbstractHashSampler. This class offers no addition options, it always hashes on the row.
To configure Accumulo to generate sample data on one thousandth of the rows, the following SamplerConfiguration could be created and used to configure a table.
```
 
 new SamplerConfiguration(RowSampler.class.getName()).setOptions(
   ImmutableMap.of("hasher","murmur3_32","modulus","1009"));
 
 
```
Since:

1.8.0

Constructor Summary

Constructors
Constructor Description

RowSampler()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`hash(DataOutput hasher, Key k)`	Subclass must override this method and hash some portion of the key.

Methods inherited from class org.apache.accumulo.core.client.sample.AbstractHashSampler
accept, init, isValidOption

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

- Constructor Detail
  - RowSampler
```
public RowSampler()
```
- Method Detail
  - hash
```
protected void hash(DataOutput hasher,
                    Key k)
             throws IOException
```
    Description copied from class: AbstractHashSampler
    
    Subclass must override this method and hash some portion of the key.
    
    Specified by:
    
    hash in class AbstractHashSampler
    
    Parameters:
    
    hasher - Data written to this will be used to compute the hash for the key.
    
    Throws:
    
    IOException