Reshuffle (core 2.44.0 API)

java.lang.Object
- org.apache.beam.sdk.transforms.PTransform<PCollection<KV<K,V>>,PCollection<KV<K,V>>>
- - org.apache.beam.sdk.transforms.Reshuffle<K,V>

Type Parameters:

K - The type of key being reshuffled on.

V - The type of value being reshuffled.

All Implemented Interfaces:

java.io.Serializable, HasDisplayData
```
@Internal
@Deprecated
public class Reshuffle<K,V>
extends PTransform<PCollection<KV<K,V>>,PCollection<KV<K,V>>>
```
Deprecated.
this transform's intended side effects are not portable; it will likely be removed

For internal use only; no backwards compatibility guarantees.
A PTransform that returns a PCollection equivalent to its input but operationally provides some of the side effects of a GroupByKey, in particular checkpointing, and preventing fusion of the surrounding transforms.
Performs a GroupByKey so that the data is key-partitioned. Configures the WindowingStrategy so that no data is dropped, but doesn't affect the need for the user to specify allowed lateness and accumulation mode before a user-inserted GroupByKey.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`Reshuffle.AssignShardFn<T>`	Deprecated.
`static class`	`Reshuffle.ViaRandomKey<T>`	Deprecated. Implementation of `viaRandomKey()`.

Field Summary
- Fields inherited from class org.apache.beam.sdk.transforms.PTransform
  name, resourceHints

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`PCollection<KV<K,V>>`	`expand(PCollection<KV<K,V>> input)`	Deprecated. Override this method to specify how this `PTransform` should be expanded on the given `InputT`.
`static <K,V> Reshuffle<K,V>`	`of()`	Deprecated.
`static <T> Reshuffle.ViaRandomKey<T>`	`viaRandomKey()`	Deprecated. Encapsulates the sequence "pair input with unique key, apply `of()`, drop the key" commonly used to break fusion.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform
compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate, validate

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

- Method Detail
  - of
```
public static <K,V> Reshuffle<K,V> of()
```
    Deprecated.
  - viaRandomKey
```
@Experimental
public static <T> Reshuffle.ViaRandomKey<T> viaRandomKey()
```
    Deprecated.
    
    Encapsulates the sequence "pair input with unique key, apply of(), drop the key" commonly used to break fusion.
  - expand
```
public PCollection<KV<K,V>> expand(PCollection<KV<K,V>> input)
```
    Deprecated.
    
    Description copied from class: PTransform
    
    Override this method to specify how this PTransform should be expanded on the given InputT.
    NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.
    Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).
    
    Specified by:
    
    expand in class PTransform<PCollection<KV<K,V>>,PCollection<KV<K,V>>>