org.apache.flink.runtime.checkpoint

类 Checkpoints

java.lang.Object

org.apache.flink.runtime.checkpoint.Checkpoints

public class Checkpoints
extends Object

A utility class with the methods to write/load/dispose the checkpoint and savepoint metadata.

Stored checkpoint metadata files have the following format:

[MagicNumber (int) | Format Version (int) | Checkpoint Metadata (variable)]

The actual savepoint serialization is version-specific via the MetadataSerializer.

字段概要

字段

限定符和类型	字段和说明
static int	HEADER_MAGIC_NUMBER Magic number at the beginning of every checkpoint metadata file, for sanity checks.

方法概要

限定符和类型	方法和说明
static void	disposeSavepoint(String pointer, CheckpointStorage checkpointStorage, ClassLoader classLoader)
static void	disposeSavepoint(String pointer, org.apache.flink.configuration.Configuration configuration, ClassLoader classLoader, org.slf4j.Logger logger)
static CompletedCheckpoint	loadAndValidateCheckpoint(org.apache.flink.api.common.JobID jobId, Map<JobVertexID,ExecutionJobVertex> tasks, CompletedCheckpointStorageLocation location, ClassLoader classLoader, boolean allowNonRestoredState, CheckpointProperties checkpointProperties)
static CheckpointMetadata	loadCheckpointMetadata(DataInputStream in, ClassLoader classLoader, String externalPointer)
static CheckpointStorage	loadCheckpointStorage(org.apache.flink.configuration.Configuration configuration, ClassLoader classLoader, org.slf4j.Logger logger)
static StateBackend	loadStateBackend(org.apache.flink.configuration.Configuration configuration, ClassLoader classLoader, org.slf4j.Logger logger)
static void	storeCheckpointMetadata(CheckpointMetadata checkpointMetadata, DataOutputStream out)
static void	storeCheckpointMetadata(CheckpointMetadata checkpointMetadata, DataOutputStream out, MetadataSerializer serializer)
static void	storeCheckpointMetadata(CheckpointMetadata checkpointMetadata, OutputStream out)

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

HEADER_MAGIC_NUMBER

public static final int HEADER_MAGIC_NUMBER

Magic number at the beginning of every checkpoint metadata file, for sanity checks.

另请参阅:

常量字段值

方法详细资料

storeCheckpointMetadata

public static void storeCheckpointMetadata(CheckpointMetadata checkpointMetadata,
                                           OutputStream out)
                                    throws IOException

抛出:

IOException

storeCheckpointMetadata

public static void storeCheckpointMetadata(CheckpointMetadata checkpointMetadata,
                                           DataOutputStream out)
                                    throws IOException

抛出:

IOException

storeCheckpointMetadata

public static void storeCheckpointMetadata(CheckpointMetadata checkpointMetadata,
                                           DataOutputStream out,
                                           MetadataSerializer serializer)
                                    throws IOException

抛出:

IOException

loadCheckpointMetadata

public static CheckpointMetadata loadCheckpointMetadata(DataInputStream in,
                                                        ClassLoader classLoader,
                                                        String externalPointer)
                                                 throws IOException

抛出:

IOException

loadAndValidateCheckpoint

public static CompletedCheckpoint loadAndValidateCheckpoint(org.apache.flink.api.common.JobID jobId,
                                                            Map<JobVertexID,ExecutionJobVertex> tasks,
                                                            CompletedCheckpointStorageLocation location,
                                                            ClassLoader classLoader,
                                                            boolean allowNonRestoredState,
                                                            CheckpointProperties checkpointProperties)
                                                     throws IOException

抛出:

IOException

disposeSavepoint

public static void disposeSavepoint(String pointer,
                                    CheckpointStorage checkpointStorage,
                                    ClassLoader classLoader)
                             throws IOException,
                                    org.apache.flink.util.FlinkException

抛出:

IOException

org.apache.flink.util.FlinkException

disposeSavepoint

public static void disposeSavepoint(String pointer,
                                    org.apache.flink.configuration.Configuration configuration,
                                    ClassLoader classLoader,
                                    @Nullable
                                    org.slf4j.Logger logger)
                             throws IOException,
                                    org.apache.flink.util.FlinkException

抛出:

IOException

org.apache.flink.util.FlinkException

loadStateBackend

@Nonnull
public static StateBackend loadStateBackend(org.apache.flink.configuration.Configuration configuration,
                                                     ClassLoader classLoader,
                                                     @Nullable
                                                     org.slf4j.Logger logger)

loadCheckpointStorage

@Nonnull
public static CheckpointStorage loadCheckpointStorage(org.apache.flink.configuration.Configuration configuration,
                                                               ClassLoader classLoader,
                                                               @Nullable
                                                               org.slf4j.Logger logger)