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

Class WindowReaderOperator<S extends State,KEY,IN,W extends Window,OUT>

java.lang.Object

org.apache.flink.state.api.input.operator.StateReaderOperator<WindowReaderFunction<IN,OUT,KEY,W>,KEY,W,OUT>

org.apache.flink.state.api.input.operator.WindowReaderOperator<S,KEY,IN,W,OUT>

Type Parameters:

S - The state type.

KEY - The key type.

IN - The type read from state.

W - The window type.

OUT - The output type of the reader.

All Implemented Interfaces:

Serializable, AutoCloseable, KeyContext

@Internal
public class WindowReaderOperator<S extends State,KEY,IN,W extends Window,OUT>
extends StateReaderOperator<WindowReaderFunction<IN,OUT,KEY,W>,KEY,W,OUT>

A StateReaderOperator for reading WindowOperator state.

See Also:

Serialized Form

Field Summary

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

function, namespaceSerializer

Method Summary

Modifier and Type	Method	Description
static <KEY,T,ACC,R,OUT,W extends Window> WindowReaderOperator<?,KEY,R,W,OUT>	aggregate(AggregateFunction<T,ACC,R> function, WindowReaderFunction<R,OUT,KEY,W> readerFunction, TypeInformation<KEY> keyType, TypeSerializer<W> windowSerializer, TypeInformation<ACC> accumulatorType)
static <KEY,T,W extends Window,OUT> WindowReaderOperator<?,KEY,StreamRecord<T>,W,OUT>	evictingWindow(WindowReaderFunction<StreamRecord<T>,OUT,KEY,W> readerFunction, TypeInformation<KEY> keyType, TypeSerializer<W> windowSerializer, TypeInformation<T> stateType, ExecutionConfig config)
CloseableIterator<Tuple2<KEY,W>>	getKeysAndNamespaces(SavepointRuntimeContext ctx)
void	open()
static <KEY,T,W extends Window,OUT> WindowReaderOperator<?,KEY,T,W,OUT>	process(WindowReaderFunction<T,OUT,KEY,W> readerFunction, TypeInformation<KEY> keyType, TypeSerializer<W> windowSerializer, TypeInformation<T> stateType)
void	processElement(KEY key, W namespace, Collector<OUT> out)
static <KEY,T,W extends Window,OUT> WindowReaderOperator<?,KEY,T,W,OUT>	reduce(ReduceFunction<T> function, WindowReaderFunction<T,OUT,KEY,W> reader, TypeInformation<KEY> keyType, TypeSerializer<W> windowSerializer, TypeInformation<T> inputType)

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

Method Detail

reduce

public static <KEY,T,W extends Window,OUT> WindowReaderOperator<?,KEY,T,W,OUT> reduce(ReduceFunction<T> function,
                                                                                                                                WindowReaderFunction<T,OUT,KEY,W> reader,
                                                                                                                                TypeInformation<KEY> keyType,
                                                                                                                                TypeSerializer<W> windowSerializer,
                                                                                                                                TypeInformation<T> inputType)

aggregate

public static <KEY,T,ACC,R,OUT,W extends Window> WindowReaderOperator<?,KEY,R,W,OUT> aggregate(AggregateFunction<T,ACC,R> function,
                                                                                                                                                     WindowReaderFunction<R,OUT,KEY,W> readerFunction,
                                                                                                                                                     TypeInformation<KEY> keyType,
                                                                                                                                                     TypeSerializer<W> windowSerializer,
                                                                                                                                                     TypeInformation<ACC> accumulatorType)

process

public static <KEY,T,W extends Window,OUT> WindowReaderOperator<?,KEY,T,W,OUT> process(WindowReaderFunction<T,OUT,KEY,W> readerFunction,
                                                                                                                                 TypeInformation<KEY> keyType,
                                                                                                                                 TypeSerializer<W> windowSerializer,
                                                                                                                                 TypeInformation<T> stateType)

evictingWindow

public static <KEY,T,W extends Window,OUT> WindowReaderOperator<?,KEY,StreamRecord<T>,W,OUT> evictingWindow(WindowReaderFunction<StreamRecord<T>,OUT,KEY,W> readerFunction,
                                                                                                                                                      TypeInformation<KEY> keyType,
                                                                                                                                                      TypeSerializer<W> windowSerializer,
                                                                                                                                                      TypeInformation<T> stateType,
                                                                                                                                                      ExecutionConfig config)

open

public void open()
          throws Exception

Overrides:

open in class StateReaderOperator<WindowReaderFunction<IN,OUT,KEY,W extends Window>,KEY,W extends Window,OUT>

Throws:

Exception

processElement

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

Specified by:

processElement in class StateReaderOperator<WindowReaderFunction<IN,OUT,KEY,W extends Window>,KEY,W extends Window,OUT>

Throws:

Exception

getKeysAndNamespaces

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

Specified by:

getKeysAndNamespaces in class StateReaderOperator<WindowReaderFunction<IN,OUT,KEY,W extends Window>,KEY,W extends Window,OUT>

Throws:

Exception