org.apache.flink.state.api.input.operator

Class KeyedStateReaderOperator<KEY,OUT>

java.lang.Object

org.apache.flink.state.api.input.operator.StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,VoidNamespace,OUT>

org.apache.flink.state.api.input.operator.KeyedStateReaderOperator<KEY,OUT>

Type Parameters:

KEY - The key type read from the state backend.

OUT - The output type of the function.

All Implemented Interfaces:

Serializable, AutoCloseable, KeyContext

@Internal
public class KeyedStateReaderOperator<KEY,OUT>
extends StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,VoidNamespace,OUT>

A StateReaderOperator for executing a KeyedStateReaderFunction.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.state.api.input.operator.StateReaderOperator

function, namespaceSerializer

Constructor Summary

Constructors

Constructor and Description
KeyedStateReaderOperator(KeyedStateReaderFunction<KEY,OUT> function, TypeInformation<KEY> keyType)

Method Summary

Modifier and Type	Method and Description
CloseableIterator<Tuple2<KEY,VoidNamespace>>	getKeysAndNamespaces(SavepointRuntimeContext ctx)
void	open()
void	processElement(KEY key, VoidNamespace namespace, Collector<OUT> out)

Methods inherited from class org.apache.flink.state.api.input.operator.StateReaderOperator

close, getCurrentKey, getInternalTimerService, getKeyedStateBackend, getKeyType, getSerializerFactory, setCurrentKey, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyedStateReaderOperator

public KeyedStateReaderOperator(KeyedStateReaderFunction<KEY,OUT> function,
                                TypeInformation<KEY> keyType)

Method Detail

open

public void open()
          throws Exception

Overrides:

open in class StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,VoidNamespace,OUT>

Throws:

Exception

processElement

public void processElement(KEY key,
                           VoidNamespace namespace,
                           Collector<OUT> out)
                    throws Exception

Specified by:

processElement in class StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,VoidNamespace,OUT>

Throws:

Exception

getKeysAndNamespaces

public CloseableIterator<Tuple2<KEY,VoidNamespace>> getKeysAndNamespaces(SavepointRuntimeContext ctx)
                                                                  throws Exception

Specified by:

getKeysAndNamespaces in class StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,VoidNamespace,OUT>

Throws:

Exception