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

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(Environment env, org.apache.flink.api.common.JobID jobID, String operatorIdentifier, org.apache.flink.api.common.typeutils.TypeSerializer<K> keySerializer, int numberOfKeyGroups, KeyGroupRange keyGroupRange, TaskKvStateRegistry kvStateRegistry, TtlTimeProvider ttlTimeProvider, org.apache.flink.metrics.MetricGroup metricGroup, Collection<KeyedStateHandle> stateHandles, org.apache.flink.core.fs.CloseableRegistry cancelStreamRegistry) Creates a new CheckpointableKeyedStateBackend that is responsible for holding keyed state and checkpointing it.
abstract OperatorStateBackend	createOperatorStateBackend(Environment env, String operatorIdentifier, Collection<OperatorStateHandle> stateHandles, org.apache.flink.core.fs.CloseableRegistry cancelStreamRegistry) 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

createKeyedStateBackend, 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(Environment env,
                                                                         org.apache.flink.api.common.JobID jobID,
                                                                         String operatorIdentifier,
                                                                         org.apache.flink.api.common.typeutils.TypeSerializer<K> keySerializer,
                                                                         int numberOfKeyGroups,
                                                                         KeyGroupRange keyGroupRange,
                                                                         TaskKvStateRegistry kvStateRegistry,
                                                                         TtlTimeProvider ttlTimeProvider,
                                                                         org.apache.flink.metrics.MetricGroup metricGroup,
                                                                         @Nonnull
                                                                         Collection<KeyedStateHandle> stateHandles,
                                                                         org.apache.flink.core.fs.CloseableRegistry cancelStreamRegistry)
                                                                  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:

env - The environment of the task.

jobID - The ID of the job that the task belongs to.

operatorIdentifier - The identifier text of the operator.

keySerializer - The key-serializer for the operator.

numberOfKeyGroups - The number of key-groups aka max parallelism.

keyGroupRange - Range of key-groups for which the to-be-created backend is responsible.

kvStateRegistry - KvStateRegistry helper for this task.

ttlTimeProvider - Provider for TTL logic to judge about state expiration.

metricGroup - The parent metric group for all state backend metrics.

stateHandles - The state handles for restore.

cancelStreamRegistry - The registry to which created closeable objects will be registered during restore.

返回:

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

抛出:

IOException

createOperatorStateBackend

public abstract OperatorStateBackend createOperatorStateBackend(Environment env,
                                                                String operatorIdentifier,
                                                                @Nonnull
                                                                Collection<OperatorStateHandle> stateHandles,
                                                                org.apache.flink.core.fs.CloseableRegistry cancelStreamRegistry)
                                                         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:

env - The runtime environment of the executing task.

operatorIdentifier - The identifier of the operator whose state should be stored.

stateHandles - The state handles for restore.

cancelStreamRegistry - The registry to register streams to close if task canceled.

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.