org.apache.flink.state.api.output

Class MergeOperatorStates

java.lang.Object

org.apache.flink.state.api.output.MergeOperatorStates

All Implemented Interfaces:

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

@Internal
public class MergeOperatorStates
extends Object
implements org.apache.flink.api.common.functions.GroupReduceFunction<org.apache.flink.runtime.checkpoint.OperatorState,org.apache.flink.runtime.checkpoint.metadata.CheckpointMetadata>

A reducer that aggregates multiple OperatorState's into a single CheckpointMetadata.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MergeOperatorStates(Collection<org.apache.flink.runtime.checkpoint.MasterState> masterStates)

Method Summary

Modifier and Type	Method and Description
void	reduce(Iterable<org.apache.flink.runtime.checkpoint.OperatorState> values, org.apache.flink.util.Collector<org.apache.flink.runtime.checkpoint.metadata.CheckpointMetadata> out)

Methods inherited from class java.lang.Object

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

Constructor Detail

MergeOperatorStates

public MergeOperatorStates(Collection<org.apache.flink.runtime.checkpoint.MasterState> masterStates)

Method Detail

reduce

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

Specified by:

reduce in interface org.apache.flink.api.common.functions.GroupReduceFunction<org.apache.flink.runtime.checkpoint.OperatorState,org.apache.flink.runtime.checkpoint.metadata.CheckpointMetadata>