Package 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,org.apache.flink.runtime.state.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, org.apache.flink.streaming.api.operators.KeyContext

@Internal
public class KeyedStateReaderOperator<KEY,OUT>
extends StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,org.apache.flink.runtime.state.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	Description
KeyedStateReaderOperator(KeyedStateReaderFunction<KEY,OUT> function, org.apache.flink.api.common.typeinfo.TypeInformation<KEY> keyType)

Method Summary

Modifier and Type	Method	Description
org.apache.flink.util.CloseableIterator<org.apache.flink.api.java.tuple.Tuple2<KEY,org.apache.flink.runtime.state.VoidNamespace>>	getKeysAndNamespaces(SavepointRuntimeContext ctx)
void	open()
void	processElement(KEY key, org.apache.flink.runtime.state.VoidNamespace namespace, org.apache.flink.util.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 Details

KeyedStateReaderOperator

public KeyedStateReaderOperator(KeyedStateReaderFunction<KEY,OUT> function,
 org.apache.flink.api.common.typeinfo.TypeInformation<KEY> keyType)

Method Details

open

public void open()
          throws Exception

Overrides:

open in class StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,org.apache.flink.runtime.state.VoidNamespace,OUT>

Throws:

Exception

processElement

public void processElement(KEY key,
 org.apache.flink.runtime.state.VoidNamespace namespace,
 org.apache.flink.util.Collector<OUT> out)
                    throws Exception

Specified by:

processElement in class StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,org.apache.flink.runtime.state.VoidNamespace,OUT>

Throws:

Exception

getKeysAndNamespaces

public org.apache.flink.util.CloseableIterator<org.apache.flink.api.java.tuple.Tuple2<KEY,org.apache.flink.runtime.state.VoidNamespace>> getKeysAndNamespaces(SavepointRuntimeContext ctx)
                                                                                                                                                       throws Exception

Specified by:

getKeysAndNamespaces in class StateReaderOperator<KeyedStateReaderFunction<KEY,OUT>,KEY,org.apache.flink.runtime.state.VoidNamespace,OUT>

Throws:

Exception