Package org.apache.flink.runtime.asyncprocessing.declare.state

Class StateWithDeclaredNamespace<K,N,V>

java.lang.Object

org.apache.flink.runtime.asyncprocessing.declare.state.StateWithDeclaredNamespace<K,N,V>

All Implemented Interfaces:

org.apache.flink.api.common.state.v2.State, InternalKeyedState<K,N,V>, InternalPartitionedState<N>

@Internal
public abstract class StateWithDeclaredNamespace<K,N,V>
extends Object
implements InternalKeyedState<K,N,V>

A partitioned state that wraps a declared namespace and hide the namespace switching from user. User will only use the state just like the public state APIs without any consideration on namespace.

This wrap class is useful in DataStream window operation, where namespace is managed by the operator and user function is free from namespace manipulation.

Constructor Summary

Constructors

Constructor	Description
StateWithDeclaredNamespace(InternalKeyedState<K,N,V> state, DeclaredVariable<N> declaredNamespace)

Method Summary

Modifier and Type	Method	Description
static <N,S extends org.apache.flink.api.common.state.v2.State> S	create(S state, DeclaredVariable<N> declaredNamespace)
protected void	resetNamespace()	Automatically called before any async state access.
void	setCurrentNamespace(N namespace)	Set current namespace and access state under specified namespace afterward.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.api.common.state.v2.State

asyncClear, clear

Constructor Detail

StateWithDeclaredNamespace

public StateWithDeclaredNamespace(@Nonnull
                                  InternalKeyedState<K,N,V> state,
                                  @Nonnull
                                  DeclaredVariable<N> declaredNamespace)

Method Detail

setCurrentNamespace

public void setCurrentNamespace(N namespace)

Description copied from interface: InternalPartitionedState

Set current namespace and access state under specified namespace afterward.

Specified by:

setCurrentNamespace in interface InternalPartitionedState<K>

Parameters:

namespace - the specified namespace

resetNamespace

protected void resetNamespace()

Automatically called before any async state access.

create

public static <N,S extends org.apache.flink.api.common.state.v2.State> S create(S state,
                                                                                      DeclaredVariable<N> declaredNamespace)