org.apache.flink.state.api.output

类 OperatorSubtaskStateReducer

java.lang.Object

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

org.apache.flink.api.common.functions.RichGroupReduceFunction<TaggedOperatorSubtaskState,org.apache.flink.runtime.checkpoint.OperatorState>

org.apache.flink.state.api.output.OperatorSubtaskStateReducer

所有已实现的接口:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.GroupReduceFunction<TaggedOperatorSubtaskState,org.apache.flink.runtime.checkpoint.OperatorState>, org.apache.flink.api.common.functions.RichFunction

@Internal
public class OperatorSubtaskStateReducer
extends org.apache.flink.api.common.functions.RichGroupReduceFunction<TaggedOperatorSubtaskState,org.apache.flink.runtime.checkpoint.OperatorState>

A reducer that aggregates all OperatorSubtaskState's for a particular operator into a single OperatorState.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
OperatorSubtaskStateReducer(org.apache.flink.runtime.jobgraph.OperatorID operatorID, int maxParallelism)

方法概要

限定符和类型	方法和说明
void	open(org.apache.flink.api.common.functions.OpenContext openContext)
void	reduce(Iterable<TaggedOperatorSubtaskState> values, org.apache.flink.util.Collector<org.apache.flink.runtime.checkpoint.OperatorState> out)

从类继承的方法 org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

从类继承的方法 java.lang.Object

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

构造器详细资料

OperatorSubtaskStateReducer

public OperatorSubtaskStateReducer(org.apache.flink.runtime.jobgraph.OperatorID operatorID,
                                   int maxParallelism)

方法详细资料

open

public void open(org.apache.flink.api.common.functions.OpenContext openContext)
          throws Exception

抛出:

Exception

reduce

public void reduce(Iterable<TaggedOperatorSubtaskState> values,
                   org.apache.flink.util.Collector<org.apache.flink.runtime.checkpoint.OperatorState> out)

指定者:

reduce 在接口中 org.apache.flink.api.common.functions.GroupReduceFunction<TaggedOperatorSubtaskState,org.apache.flink.runtime.checkpoint.OperatorState>

指定者:

reduce 在类中 org.apache.flink.api.common.functions.RichGroupReduceFunction<TaggedOperatorSubtaskState,org.apache.flink.runtime.checkpoint.OperatorState>