RichMapPartitionFunction (Flink : 2.0-SNAPSHOT API)

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

Type Parameters:

I - Type of the input elements.

O - Type of the returned elements.

All Implemented Interfaces:

Serializable, Function, MapPartitionFunction<I,O>, RichFunction

Direct Known Subclasses:

AssignRangeIndex, RangeBoundaryBuilder
```
@Public
public abstract class RichMapPartitionFunction<I,O>
extends AbstractRichFunction
implements MapPartitionFunction<I,O>
```
Rich variant of the MapPartitionFunction. As a RichFunction, it gives access to the RuntimeContext and provides setup and teardown methods: RichFunction.open(OpenContext) and RichFunction.close().

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

RichMapPartitionFunction()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract void`	`mapPartition(Iterable<I> values, Collector<O> 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
  - RichMapPartitionFunction
```
public RichMapPartitionFunction()
```
- Method Detail
  - mapPartition
```
public abstract void mapPartition(Iterable<I> values,
                                  Collector<O> 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<I,O>
    
    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.