org.apache.flink.runtime.operators.udf

Class RangeBoundaryBuilder<T>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.api.common.functions.RichMapPartitionFunction<T,Object[][]>

org.apache.flink.runtime.operators.udf.RangeBoundaryBuilder<T>

Type Parameters:

T -

All Implemented Interfaces:

Serializable, Function, MapPartitionFunction<T,Object[][]>, RichFunction

public class RangeBoundaryBuilder<T>
extends RichMapPartitionFunction<T,Object[][]>

Build RangeBoundaries with input records. First, sort the input records, and then select the boundaries with same interval.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RangeBoundaryBuilder(TypeComparatorFactory<T> comparator, int parallelism)

Method Summary

Modifier and Type	Method and Description
void	mapPartition(Iterable<T> values, Collector<Object[][]> out) A user-implemented function that modifies or transforms an incoming object.

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

RangeBoundaryBuilder

public RangeBoundaryBuilder(TypeComparatorFactory<T> comparator,
                            int parallelism)

Method Detail

mapPartition

public void mapPartition(Iterable<T> values,
                         Collector<Object[][]> out)
                  throws Exception

Description copied from interface: MapPartitionFunction

A user-implemented function that modifies or transforms an incoming object.

Specified by:

mapPartition in interface MapPartitionFunction<T,Object[][]>

Specified by:

mapPartition in class RichMapPartitionFunction<T,Object[][]>

Parameters:

values - All records for the mapper

out - The collector to hand results to.

Throws:

Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail and may trigger recovery.