Package org.apache.flink.streaming.api.operators.sorted.state

Class BatchExecutionStateBackend

java.lang.Object

org.apache.flink.streaming.api.operators.sorted.state.BatchExecutionStateBackend

All Implemented Interfaces:

Serializable, StateBackend

public class BatchExecutionStateBackend
extends Object
implements StateBackend

A simple StateBackend which is used in a BATCH style execution.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.state.StateBackend

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

Constructor Summary

Constructors

Constructor	Description
BatchExecutionStateBackend()

Method Summary

Modifier and Type	Method	Description
<K> CheckpointableKeyedStateBackend<K>	createKeyedStateBackend(StateBackend.KeyedStateBackendParameters<K> parameters)	Creates a new CheckpointableKeyedStateBackend that is responsible for holding keyed state and checkpointing it.
OperatorStateBackend	createOperatorStateBackend(StateBackend.OperatorStateBackendParameters parameters)	Creates a new OperatorStateBackend that can be used for storing operator state.

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.runtime.state.StateBackend

createAsyncKeyedStateBackend, getName, supportsAsyncKeyedStateBackend, supportsNoClaimRestoreMode, supportsSavepointFormat, useManagedMemory

Constructor Detail

BatchExecutionStateBackend

public BatchExecutionStateBackend()

Method Detail

createKeyedStateBackend

public <K> CheckpointableKeyedStateBackend<K> createKeyedStateBackend(StateBackend.KeyedStateBackendParameters<K> parameters)

Description copied from interface: 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.

Specified by:

createKeyedStateBackend in interface StateBackend

Type Parameters:

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

Parameters:

parameters - The arguments bundle for creating CheckpointableKeyedStateBackend.

Returns:

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

createOperatorStateBackend

public OperatorStateBackend createOperatorStateBackend(StateBackend.OperatorStateBackendParameters parameters)
                                                throws Exception

Description copied from interface: 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.

Specified by:

createOperatorStateBackend in interface StateBackend

Parameters:

parameters - The arguments bundle for creating OperatorStateBackend.

Returns:

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

Throws:

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