SampleWithFraction (Flink : Java 1.18.1-cp2 API)

java.lang.Object
- org.apache.flink.api.common.functions.AbstractRichFunction
- - org.apache.flink.api.common.functions.RichMapPartitionFunction<T,T>
  - - org.apache.flink.api.java.functions.SampleWithFraction<T>

Type Parameters:

T -

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.MapPartitionFunction<T,T>, org.apache.flink.api.common.functions.RichFunction
```
@Internal
public class SampleWithFraction<T>
extends org.apache.flink.api.common.functions.RichMapPartitionFunction<T,T>
```
A map partition function wrapper for sampling algorithms with fraction, the sample algorithm takes the partition iterator as input.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor	Description
`SampleWithFraction(boolean withReplacement, double fraction, long seed)`	Create a function instance of SampleWithFraction.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

void mapPartition(Iterable<T> values, org.apache.flink.util.Collector<T> out)
- Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction
  close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SampleWithFraction
```
public SampleWithFraction(boolean withReplacement,
                          double fraction,
                          long seed)
```
    Create a function instance of SampleWithFraction.
    
    Parameters:
    
    withReplacement - Whether element can be selected more than once.
    
    fraction - Probability that each element is selected.
    
    seed - random number generator seed.
- Method Detail
  - mapPartition
```
public void mapPartition(Iterable<T> values,
                         org.apache.flink.util.Collector<T> out)
                  throws Exception
```
    Specified by:
    
    mapPartition in interface org.apache.flink.api.common.functions.MapPartitionFunction<T,T>
    
    Specified by:
    
    mapPartition in class org.apache.flink.api.common.functions.RichMapPartitionFunction<T,T>
    
    Throws:
    
    Exception