org.apache.flink.runtime.checkpoint

类 EmbeddedCompletedCheckpointStore

java.lang.Object

org.apache.flink.runtime.checkpoint.AbstractCompleteCheckpointStore

org.apache.flink.runtime.checkpoint.EmbeddedCompletedCheckpointStore

所有已实现的接口:

CompletedCheckpointStore

public class EmbeddedCompletedCheckpointStore
extends AbstractCompleteCheckpointStore

An embedded in-memory checkpoint store, which supports shutdown and suspend.

字段概要

从接口继承的字段 org.apache.flink.runtime.checkpoint.CompletedCheckpointStore

LOG

构造器概要

构造器

构造器和说明
EmbeddedCompletedCheckpointStore()
EmbeddedCompletedCheckpointStore(int maxRetainedCheckpoints)
EmbeddedCompletedCheckpointStore(int maxRetainedCheckpoints, Collection<CompletedCheckpoint> initialCheckpoints, RestoreMode restoreMode)
EmbeddedCompletedCheckpointStore(int maxRetainedCheckpoints, Collection<CompletedCheckpoint> initialCheckpoints, SharedStateRegistry sharedStateRegistry)

方法概要

限定符和类型	方法和说明
CompletedCheckpoint	addCheckpointAndSubsumeOldestOne(CompletedCheckpoint checkpoint, CheckpointsCleaner checkpointsCleaner, Runnable postCleanup) Adds a CompletedCheckpoint instance to the list of completed checkpoints.
List<CompletedCheckpoint>	getAllCheckpoints() Returns all CompletedCheckpoint instances.
int	getMaxNumberOfRetainedCheckpoints() Returns the max number of retained checkpoints.
int	getNumberOfRetainedCheckpoints() Returns the current number of retained checkpoints.
Optional<org.apache.flink.api.common.JobStatus>	getShutdownStatus()
boolean	requiresExternalizedCheckpoints() This method returns whether the completed checkpoint store requires checkpoints to be externalized.
void	shutdown(org.apache.flink.api.common.JobStatus jobStatus, CheckpointsCleaner checkpointsCleaner) Shuts down the store.

从类继承的方法 org.apache.flink.runtime.checkpoint.AbstractCompleteCheckpointStore

findLowest, getSharedStateRegistry, unregisterUnusedState

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.checkpoint.CompletedCheckpointStore

getLatestCheckpoint, getLatestCheckpointId

构造器详细资料

EmbeddedCompletedCheckpointStore

@VisibleForTesting
public EmbeddedCompletedCheckpointStore()

EmbeddedCompletedCheckpointStore

@VisibleForTesting
public EmbeddedCompletedCheckpointStore(int maxRetainedCheckpoints)

EmbeddedCompletedCheckpointStore

public EmbeddedCompletedCheckpointStore(int maxRetainedCheckpoints,
                                        Collection<CompletedCheckpoint> initialCheckpoints,
                                        RestoreMode restoreMode)

EmbeddedCompletedCheckpointStore

public EmbeddedCompletedCheckpointStore(int maxRetainedCheckpoints,
                                        Collection<CompletedCheckpoint> initialCheckpoints,
                                        SharedStateRegistry sharedStateRegistry)

方法详细资料

addCheckpointAndSubsumeOldestOne

public CompletedCheckpoint addCheckpointAndSubsumeOldestOne(CompletedCheckpoint checkpoint,
                                                            CheckpointsCleaner checkpointsCleaner,
                                                            Runnable postCleanup)
                                                     throws Exception

从接口复制的说明: CompletedCheckpointStore

Adds a CompletedCheckpoint instance to the list of completed checkpoints.

Only a bounded number of checkpoints is kept. When exceeding the maximum number of retained checkpoints, the oldest one will be discarded.

返回:

the subsumed oldest completed checkpoint if possible, return null if no checkpoint needs to be discarded on subsume.

抛出:

Exception

shutdown

public void shutdown(org.apache.flink.api.common.JobStatus jobStatus,
                     CheckpointsCleaner checkpointsCleaner)
              throws Exception

从接口复制的说明: CompletedCheckpointStore

Shuts down the store.

The job status is forwarded and used to decide whether state should actually be discarded or kept.

指定者:

shutdown 在接口中 CompletedCheckpointStore

覆盖:

shutdown 在类中 AbstractCompleteCheckpointStore

参数:

jobStatus - Job state on shut down

checkpointsCleaner - that will cleanup completed checkpoints if needed

抛出:

Exception

getAllCheckpoints

public List<CompletedCheckpoint> getAllCheckpoints()

从接口复制的说明: CompletedCheckpointStore

Returns all CompletedCheckpoint instances.

Returns an empty list if no checkpoint has been added yet.

getNumberOfRetainedCheckpoints

public int getNumberOfRetainedCheckpoints()

从接口复制的说明: CompletedCheckpointStore

Returns the current number of retained checkpoints.

getMaxNumberOfRetainedCheckpoints

public int getMaxNumberOfRetainedCheckpoints()

从接口复制的说明: CompletedCheckpointStore

Returns the max number of retained checkpoints.

requiresExternalizedCheckpoints

public boolean requiresExternalizedCheckpoints()

从接口复制的说明: CompletedCheckpointStore

This method returns whether the completed checkpoint store requires checkpoints to be externalized. Externalized checkpoints have their meta data persisted, which the checkpoint store can exploit (for example by simply pointing the persisted metadata).

返回:

True, if the store requires that checkpoints are externalized before being added, false if the store stores the metadata itself.

getShutdownStatus

public Optional<org.apache.flink.api.common.JobStatus> getShutdownStatus()