org.apache.flink.state.api

类 WritableSavepoint<F extends WritableSavepoint>

java.lang.Object

org.apache.flink.state.api.WritableSavepoint<F>

类型参数:

F - The implementation type.

直接已知子类:

ExistingSavepoint, NewSavepoint

@PublicEvolving
public abstract class WritableSavepoint<F extends WritableSavepoint>
extends Object

A WritableSavepoint is any savepoint that can be written to from a batch context. Internally, a SavepointMetadata object is maintained that keeps track of the set of existing operator states in the savepoint, as well as newly added operator states defined by their BootstrapTransformation.

字段概要

字段

限定符和类型	字段和说明
protected SavepointMetadata	metadata The savepoint metadata, which maintains the current set of existing / newly added operator states.
protected org.apache.flink.runtime.state.StateBackend	stateBackend The state backend to use when writing this savepoint.

方法概要

限定符和类型	方法和说明
F	removeOperator(String uid) Drop an existing operator from the savepoint.
<T> F	withConfiguration(org.apache.flink.configuration.ConfigOption<T> option, T value) Sets a configuration that will be applied to the stream operators used to bootstrap a new savepoint.
<T> F	withOperator(String uid, BootstrapTransformation<T> transformation) Adds a new operator to the savepoint.
void	write(String path) Write out a new or updated savepoint.

从类继承的方法 java.lang.Object

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

字段详细资料

metadata

protected final SavepointMetadata metadata

The savepoint metadata, which maintains the current set of existing / newly added operator states.

stateBackend

protected final org.apache.flink.runtime.state.StateBackend stateBackend

The state backend to use when writing this savepoint.

方法详细资料

removeOperator

public F removeOperator(String uid)

Drop an existing operator from the savepoint.

参数:

uid - The uid of the operator.

返回:

A modified savepoint.

withOperator

public <T> F withOperator(String uid,
                          BootstrapTransformation<T> transformation)

Adds a new operator to the savepoint.

参数:

uid - The uid of the operator.

transformation - The operator to be included.

返回:

The modified savepoint.

withConfiguration

public <T> F withConfiguration(org.apache.flink.configuration.ConfigOption<T> option,
                               T value)

Sets a configuration that will be applied to the stream operators used to bootstrap a new savepoint.

类型参数:

T - type of the value to be stored

参数:

option - metadata information

value - value to be stored

返回:

The modified savepoint.

write

public final void write(String path)

Write out a new or updated savepoint.

参数:

path - The path to where the savepoint should be written.