org.apache.flink.state.api

类 OperatorTransformation

java.lang.Object

org.apache.flink.state.api.OperatorTransformation

@PublicEvolving
public final class OperatorTransformation
extends Object

This class provides the entry point for building BootstrapTransformations, which represents procedures to bootstrap new operator states with a given DataSet.

Example usage

   DataSet<StateData> stateData = ...;

   // to bootstrap non-keyed state:
   BootstrapTransformation<StateData> nonKeyedStateBootstrap = OperatorTransformation
       .bootstrapWith(stateData)
       .transform(new StateBootstrapFunction<StateData>() {...})

   // to bootstrap keyed state:
   BootstrapTransformation<StateData> keyedStateBootstrap = OperatorTransformation
       .bootstrapWith(stateData)
       .keyBy(new KeySelector<StateData, KeyType>() {...})
       .transform(new KeyedStateBootstrapFunction<KeyType, StateData>() {...})
 

The code example above demonstrates how to create BootstrapTransformations for non-keyed and keyed state. The built bootstrap transformations can then be registered with your ExistingSavepoint or Savepoint prior to writing it.

另请参阅:

OneInputOperatorTransformation, KeyedOperatorTransformation, BootstrapTransformation

方法概要

限定符和类型	方法和说明
static <T> OneInputOperatorTransformation<T>	bootstrapWith(org.apache.flink.api.java.DataSet<T> dataSet) Create a new OperatorTransformation from a DataSet.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

bootstrapWith

public static <T> OneInputOperatorTransformation<T> bootstrapWith(org.apache.flink.api.java.DataSet<T> dataSet)

Create a new OperatorTransformation from a DataSet.

类型参数:

T - The type of the input.

参数:

dataSet - A dataset of elements.

返回:

A OneInputOperatorTransformation.