org.apache.flink.table.runtime.dataview

类 PerWindowStateDataViewStore

java.lang.Object

org.apache.flink.table.runtime.dataview.PerWindowStateDataViewStore

所有已实现的接口:

StateDataViewStore

@Internal
public final class PerWindowStateDataViewStore
extends Object
implements StateDataViewStore

An implementation of StateDataViewStore for window aggregates which forwards the state registration to an underlying KeyedStateBackend. The created state by this store has the ability to switch window namespaces.

构造器概要

构造器

构造器和说明
PerWindowStateDataViewStore(org.apache.flink.runtime.state.KeyedStateBackend<?> keyedStateBackend, org.apache.flink.api.common.typeutils.TypeSerializer<?> windowSerializer, org.apache.flink.api.common.functions.RuntimeContext runtimeContext)

方法概要

限定符和类型	方法和说明
org.apache.flink.api.common.functions.RuntimeContext	getRuntimeContext()
<N,EE> StateListView<N,EE>	getStateListView(String stateName, org.apache.flink.api.common.typeutils.TypeSerializer<EE> elementSerializer) Creates a state list view.
<N,EK,EV> StateMapView<N,EK,EV>	getStateMapView(String stateName, boolean supportNullKey, org.apache.flink.api.common.typeutils.TypeSerializer<EK> keySerializer, org.apache.flink.api.common.typeutils.TypeSerializer<EV> valueSerializer) Creates a state map view.

从类继承的方法 java.lang.Object

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

构造器详细资料

PerWindowStateDataViewStore

public PerWindowStateDataViewStore(org.apache.flink.runtime.state.KeyedStateBackend<?> keyedStateBackend,
                                   org.apache.flink.api.common.typeutils.TypeSerializer<?> windowSerializer,
                                   org.apache.flink.api.common.functions.RuntimeContext runtimeContext)

方法详细资料

getStateMapView

public <N,EK,EV> StateMapView<N,EK,EV> getStateMapView(String stateName,
                                                       boolean supportNullKey,
                                                       org.apache.flink.api.common.typeutils.TypeSerializer<EK> keySerializer,
                                                       org.apache.flink.api.common.typeutils.TypeSerializer<EV> valueSerializer)
                                                throws Exception

从接口复制的说明: StateDataViewStore

Creates a state map view.

指定者:

getStateMapView 在接口中 StateDataViewStore

类型参数:

N - Type of the namespace

EK - External type of the keys in the map state

EV - External type of the values in the map state

参数:

stateName - The name of underlying state of the map view

supportNullKey - Whether the null key should be supported

keySerializer - The key serializer

valueSerializer - The value serializer

返回:

a keyed map state

抛出:

Exception

getStateListView

public <N,EE> StateListView<N,EE> getStateListView(String stateName,
                                                   org.apache.flink.api.common.typeutils.TypeSerializer<EE> elementSerializer)
                                            throws Exception

从接口复制的说明: StateDataViewStore

Creates a state list view.

指定者:

getStateListView 在接口中 StateDataViewStore

类型参数:

N - Type of the namespace

EE - External type of the elements in the list state

参数:

stateName - The name of underlying state of the list view

elementSerializer - The element serializer

返回:

a keyed list state

抛出:

Exception

getRuntimeContext

public org.apache.flink.api.common.functions.RuntimeContext getRuntimeContext()

指定者:

getRuntimeContext 在接口中 StateDataViewStore