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

Class StateReaderOperator<F extends org.apache.flink.api.common.functions.Function,KEY,N,OUT>

java.lang.Object

org.apache.flink.state.api.input.operator.StateReaderOperator<F,KEY,N,OUT>

Type Parameters:

F - The type of the user function.

KEY - The key type.

N - The namespace type.

OUT - The output type.

All Implemented Interfaces:

Serializable, AutoCloseable, org.apache.flink.streaming.api.operators.KeyContext

Direct Known Subclasses:

KeyedStateReaderOperator, WindowReaderOperator

@Internal
public abstract class StateReaderOperator<F extends org.apache.flink.api.common.functions.Function,KEY,N,OUT>
extends Object
implements org.apache.flink.streaming.api.operators.KeyContext, AutoCloseable, Serializable

Base class for executing functions that read keyed state.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected F	function
protected org.apache.flink.api.common.typeutils.TypeSerializer<N>	namespaceSerializer

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	StateReaderOperator(F function, org.apache.flink.api.common.typeinfo.TypeInformation<KEY> keyType, org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer)

Method Summary

Modifier and Type	Method	Description
void	close()
Object	getCurrentKey()
protected org.apache.flink.streaming.api.operators.InternalTimerService<N>	getInternalTimerService(String name)
org.apache.flink.runtime.state.KeyedStateBackend<KEY>	getKeyedStateBackend()
abstract org.apache.flink.util.CloseableIterator<org.apache.flink.api.java.tuple.Tuple2<KEY,N>>	getKeysAndNamespaces(SavepointRuntimeContext ctx)
org.apache.flink.api.common.typeinfo.TypeInformation<KEY>	getKeyType()
org.apache.flink.api.common.functions.SerializerFactory	getSerializerFactory()
void	open()
abstract void	processElement(KEY key, N namespace, org.apache.flink.util.Collector<OUT> out)
void	setCurrentKey(Object key)
void	setup(org.apache.flink.api.common.functions.SerializerFactory serializerFactory, org.apache.flink.runtime.state.KeyedStateBackend<KEY> keyKeyedStateBackend, org.apache.flink.streaming.api.operators.InternalTimeServiceManager<KEY> timerServiceManager, SavepointRuntimeContext ctx)

Methods inherited from class java.lang.Object

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

Field Detail

function

protected final F extends org.apache.flink.api.common.functions.Function function

namespaceSerializer

protected final org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer

Constructor Detail

StateReaderOperator

protected StateReaderOperator(F function,
                              org.apache.flink.api.common.typeinfo.TypeInformation<KEY> keyType,
                              org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer)

Method Detail

processElement

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

Throws:

Exception

getKeysAndNamespaces

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

Throws:

Exception

setup

public final void setup(org.apache.flink.api.common.functions.SerializerFactory serializerFactory,
                        org.apache.flink.runtime.state.KeyedStateBackend<KEY> keyKeyedStateBackend,
                        org.apache.flink.streaming.api.operators.InternalTimeServiceManager<KEY> timerServiceManager,
                        SavepointRuntimeContext ctx)

getInternalTimerService

protected final org.apache.flink.streaming.api.operators.InternalTimerService<N> getInternalTimerService(String name)

open

public void open()
          throws Exception

Throws:

Exception

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception

setCurrentKey

public final void setCurrentKey(Object key)

Specified by:

setCurrentKey in interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey

public final Object getCurrentKey()

Specified by:

getCurrentKey in interface org.apache.flink.streaming.api.operators.KeyContext

getKeyedStateBackend

public final org.apache.flink.runtime.state.KeyedStateBackend<KEY> getKeyedStateBackend()

getKeyType

public final org.apache.flink.api.common.typeinfo.TypeInformation<KEY> getKeyType()

getSerializerFactory

public final org.apache.flink.api.common.functions.SerializerFactory getSerializerFactory()