org.apache.flink.runtime.state

类 AbstractStateBackend

java.lang.Object

org.apache.flink.runtime.state.AbstractStateBackend

所有已实现的接口:

Serializable, StateBackend

直接已知子类:

AbstractFileStateBackend, AbstractManagedMemoryStateBackend, HashMapStateBackend

@PublicEvolving
public abstract class AbstractStateBackend
extends Object
implements StateBackend, Serializable

An abstract base implementation of the StateBackend interface.

This class has currently no contents and only kept to not break the prior class hierarchy for users.

另请参阅:

序列化表格

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.runtime.state.StateBackend

StateBackend.CustomInitializationMetrics, StateBackend.KeyedStateBackendParameters<K>, StateBackend.OperatorStateBackendParameters

字段概要

字段

限定符和类型	字段和说明
protected LatencyTrackingStateConfig.Builder	latencyTrackingConfigBuilder

构造器概要

构造器

构造器和说明
AbstractStateBackend()

方法概要

限定符和类型	方法和说明
abstract <K> AbstractKeyedStateBackend<K>	createKeyedStateBackend(StateBackend.KeyedStateBackendParameters<K> parameters) Creates a new CheckpointableKeyedStateBackend that is responsible for holding keyed state and checkpointing it.
abstract OperatorStateBackend	createOperatorStateBackend(StateBackend.OperatorStateBackendParameters parameters) Creates a new OperatorStateBackend that can be used for storing operator state.
static StreamCompressionDecorator	getCompressionDecorator(org.apache.flink.api.common.ExecutionConfig executionConfig)

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.runtime.state.StateBackend

createAsyncKeyedStateBackend, getName, supportsAsyncKeyedStateBackend, supportsNoClaimRestoreMode, supportsSavepointFormat, useManagedMemory

字段详细资料

latencyTrackingConfigBuilder

protected LatencyTrackingStateConfig.Builder latencyTrackingConfigBuilder

构造器详细资料

AbstractStateBackend

public AbstractStateBackend()

方法详细资料

getCompressionDecorator

public static StreamCompressionDecorator getCompressionDecorator(org.apache.flink.api.common.ExecutionConfig executionConfig)

createKeyedStateBackend

public abstract <K> AbstractKeyedStateBackend<K> createKeyedStateBackend(StateBackend.KeyedStateBackendParameters<K> parameters)
                                                                  throws IOException

从接口复制的说明: StateBackend

Creates a new CheckpointableKeyedStateBackend that is responsible for holding keyed state and checkpointing it.

Keyed State is state where each value is bound to a key.

指定者:

createKeyedStateBackend 在接口中 StateBackend

类型参数:

K - The type of the keys by which the state is organized.

参数:

parameters - The arguments bundle for creating CheckpointableKeyedStateBackend.

返回:

The Keyed State Backend for the given job, operator, and key group range.

抛出:

IOException

createOperatorStateBackend

public abstract OperatorStateBackend createOperatorStateBackend(StateBackend.OperatorStateBackendParameters parameters)
                                                         throws Exception

从接口复制的说明: StateBackend

Creates a new OperatorStateBackend that can be used for storing operator state.

Operator state is state that is associated with parallel operator (or function) instances, rather than with keys.

指定者:

createOperatorStateBackend 在接口中 StateBackend

参数:

parameters - The arguments bundle for creating OperatorStateBackend.

返回:

The OperatorStateBackend for operator identified by the job and operator identifier.

抛出:

Exception - This method may forward all exceptions that occur while instantiating the backend.