org.apache.flink.runtime.state

接口 AsyncKeyedStateBackend

所有超级接口:

AutoCloseable, Closeable, org.apache.flink.util.Disposable

@Internal
public interface AsyncKeyedStateBackend
extends org.apache.flink.util.Disposable, Closeable

An async keyed state backend provides methods supporting to access keyed state asynchronously and in batch.

方法概要

限定符和类型	方法和说明
<SV,S extends org.apache.flink.api.common.state.v2.State> S	createState(StateDescriptor<SV> stateDesc) Creates and returns a new state.
StateExecutor	createStateExecutor() Creates a StateExecutor which supports to execute a batch of state requests asynchronously.
void	dispose()
void	setup(StateRequestHandler stateRequestHandler) Initializes with some contexts.

从接口继承的方法 java.io.Closeable

close

方法详细资料

setup

void setup(@Nonnull
           StateRequestHandler stateRequestHandler)

Initializes with some contexts.

参数:

stateRequestHandler - which handles state request.

createState

@Nonnull
<SV,S extends org.apache.flink.api.common.state.v2.State> S createState(@Nonnull
                                                                                 StateDescriptor<SV> stateDesc)
                                                                          throws Exception

Creates and returns a new state.

类型参数:

SV - The type of the stored state value.

S - The type of the public API state.

参数:

stateDesc - The StateDescriptor that contains the name of the state.

抛出:

Exception - Exceptions may occur during initialization of the state.

createStateExecutor

@Nonnull
StateExecutor createStateExecutor()

Creates a StateExecutor which supports to execute a batch of state requests asynchronously.

Notice that the AsyncKeyedStateBackend is responsible for shutting down the StateExecutors created by itself when they are no longer in use.

返回:

a StateExecutor which supports to execute a batch of state requests asynchronously.

dispose

void dispose()

指定者:

dispose 在接口中 org.apache.flink.util.Disposable