org.apache.flink.runtime.state

类 DefaultOperatorStateBackend

java.lang.Object

org.apache.flink.runtime.state.DefaultOperatorStateBackend

所有已实现的接口:

Closeable, AutoCloseable, org.apache.flink.api.common.state.OperatorStateStore, OperatorStateBackend, SnapshotStrategy<SnapshotResult<OperatorStateHandle>>, org.apache.flink.util.Disposable

@Internal
public class DefaultOperatorStateBackend
extends Object
implements OperatorStateBackend

Default implementation of OperatorStateStore that provides the ability to make snapshots.

字段概要

字段

限定符和类型	字段和说明
static String	DEFAULT_OPERATOR_STATE_NAME The default namespace for state in cases where no state name is provided

构造器概要

构造器

构造器和说明

DefaultOperatorStateBackend(org.apache.flink.api.common.ExecutionConfig executionConfig, org.apache.flink.core.fs.CloseableRegistry closeStreamOnCancelRegistry, Map<String,PartitionableListState<?>> registeredOperatorStates, Map<String,BackendWritableBroadcastState<?,?>> registeredBroadcastStates, Map<String,PartitionableListState<?>> accessedStatesByName, Map<String,BackendWritableBroadcastState<?,?>> accessedBroadcastStatesByName, AbstractSnapshotStrategy<OperatorStateHandle> snapshotStrategy)

方法概要

限定符和类型	方法和说明
void	close()
void	dispose()
<K,V> org.apache.flink.api.common.state.BroadcastState<K,V>	getBroadcastState(org.apache.flink.api.common.state.MapStateDescriptor<K,V> stateDescriptor)
org.apache.flink.api.common.ExecutionConfig	getExecutionConfig()
<S> org.apache.flink.api.common.state.ListState<S>	getListState(org.apache.flink.api.common.state.ListStateDescriptor<S> stateDescriptor)
Set<String>	getRegisteredBroadcastStateNames()
Set<String>	getRegisteredStateNames()
<S> org.apache.flink.api.common.state.ListState<S>	getUnionListState(org.apache.flink.api.common.state.ListStateDescriptor<S> stateDescriptor)
RunnableFuture<SnapshotResult<OperatorStateHandle>>	snapshot(long checkpointId, long timestamp, CheckpointStreamFactory streamFactory, CheckpointOptions checkpointOptions) Operation that writes a snapshot into a stream that is provided by the given CheckpointStreamFactory and returns a @RunnableFuture that gives a state handle to the snapshot.

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

DEFAULT_OPERATOR_STATE_NAME

public static final String DEFAULT_OPERATOR_STATE_NAME

The default namespace for state in cases where no state name is provided

另请参阅:

常量字段值

构造器详细资料

DefaultOperatorStateBackend

public DefaultOperatorStateBackend(org.apache.flink.api.common.ExecutionConfig executionConfig,
                                   org.apache.flink.core.fs.CloseableRegistry closeStreamOnCancelRegistry,
                                   Map<String,PartitionableListState<?>> registeredOperatorStates,
                                   Map<String,BackendWritableBroadcastState<?,?>> registeredBroadcastStates,
                                   Map<String,PartitionableListState<?>> accessedStatesByName,
                                   Map<String,BackendWritableBroadcastState<?,?>> accessedBroadcastStatesByName,
                                   AbstractSnapshotStrategy<OperatorStateHandle> snapshotStrategy)

方法详细资料

getExecutionConfig

public org.apache.flink.api.common.ExecutionConfig getExecutionConfig()

getRegisteredStateNames

public Set<String> getRegisteredStateNames()

指定者:

getRegisteredStateNames 在接口中 org.apache.flink.api.common.state.OperatorStateStore

getRegisteredBroadcastStateNames

public Set<String> getRegisteredBroadcastStateNames()

指定者:

getRegisteredBroadcastStateNames 在接口中 org.apache.flink.api.common.state.OperatorStateStore

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

抛出:

IOException

dispose

public void dispose()

指定者:

dispose 在接口中 OperatorStateBackend

指定者:

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

getBroadcastState

public <K,V> org.apache.flink.api.common.state.BroadcastState<K,V> getBroadcastState(org.apache.flink.api.common.state.MapStateDescriptor<K,V> stateDescriptor)
                                                                              throws org.apache.flink.util.StateMigrationException

指定者:

getBroadcastState 在接口中 org.apache.flink.api.common.state.OperatorStateStore

抛出:

org.apache.flink.util.StateMigrationException

getListState

public <S> org.apache.flink.api.common.state.ListState<S> getListState(org.apache.flink.api.common.state.ListStateDescriptor<S> stateDescriptor)
                                                                throws Exception

指定者:

getListState 在接口中 org.apache.flink.api.common.state.OperatorStateStore

抛出:

Exception

getUnionListState

public <S> org.apache.flink.api.common.state.ListState<S> getUnionListState(org.apache.flink.api.common.state.ListStateDescriptor<S> stateDescriptor)
                                                                     throws Exception

指定者:

getUnionListState 在接口中 org.apache.flink.api.common.state.OperatorStateStore

抛出:

Exception

snapshot

@Nonnull
public RunnableFuture<SnapshotResult<OperatorStateHandle>> snapshot(long checkpointId,
                                                                             long timestamp,
                                                                             @Nonnull
                                                                             CheckpointStreamFactory streamFactory,
                                                                             @Nonnull
                                                                             CheckpointOptions checkpointOptions)
                                                                      throws Exception

从接口复制的说明: SnapshotStrategy

Operation that writes a snapshot into a stream that is provided by the given CheckpointStreamFactory and returns a @RunnableFuture that gives a state handle to the snapshot. It is up to the implementation if the operation is performed synchronous or asynchronous. In the later case, the returned Runnable must be executed first before obtaining the handle.

指定者:

snapshot 在接口中 SnapshotStrategy<SnapshotResult<OperatorStateHandle>>

参数:

checkpointId - The ID of the checkpoint.

timestamp - The timestamp of the checkpoint.

streamFactory - The factory that we can use for writing our state to streams.

checkpointOptions - Options for how to perform this checkpoint.

返回:

A runnable future that will yield a StateObject.

抛出:

Exception