Package org.apache.beam.runners.flink.translation.wrappers.streaming

Class WorkItemKeySelector<K,V>

java.lang.Object

org.apache.beam.runners.flink.translation.wrappers.streaming.WorkItemKeySelector<K,V>

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.java.functions.KeySelector<WindowedValue<org.apache.beam.runners.core.KeyedWorkItem<K,V>>,FlinkKey>, org.apache.flink.api.java.typeutils.ResultTypeQueryable<FlinkKey>

public class WorkItemKeySelector<K,V>
extends Object
implements org.apache.flink.api.java.functions.KeySelector<WindowedValue<org.apache.beam.runners.core.KeyedWorkItem<K,V>>,FlinkKey>, org.apache.flink.api.java.typeutils.ResultTypeQueryable<FlinkKey>

KeySelector that retrieves a key from a KeyedWorkItem. This will return the key as encoded by the provided Coder in a ByteBuffer. This ensures that all key comparisons/hashing happen on the encoded form.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
WorkItemKeySelector(Coder<K> keyCoder)

Method Summary

Modifier and Type	Method	Description
FlinkKey	getKey(WindowedValue<org.apache.beam.runners.core.KeyedWorkItem<K,V>> value)
org.apache.flink.api.common.typeinfo.TypeInformation<FlinkKey>	getProducedType()

Methods inherited from class java.lang.Object

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

Constructor Details

WorkItemKeySelector

public WorkItemKeySelector(Coder<K> keyCoder)

Method Details

getKey

public FlinkKey getKey(WindowedValue<org.apache.beam.runners.core.KeyedWorkItem<K,V>> value)
                throws Exception

Specified by:

getKey in interface org.apache.flink.api.java.functions.KeySelector<K,V>

Throws:

Exception

getProducedType

public org.apache.flink.api.common.typeinfo.TypeInformation<FlinkKey> getProducedType()

Specified by:

getProducedType in interface org.apache.flink.api.java.typeutils.ResultTypeQueryable<K>