Package org.apache.flink.state.api.runtime

Class SavepointLoader

java.lang.Object

org.apache.flink.state.api.runtime.SavepointLoader

@Internal
public final class SavepointLoader
extends Object

Utility class for loading savepoint metadata and operator state information.

Method Summary

Modifier and Type	Method	Description
static Map<String,org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot>	loadOperatorStateMetadata(String savepointPath, OperatorIdentifier operatorIdentifier)	Loads all state metadata for an operator in a single I/O operation.
static org.apache.flink.runtime.checkpoint.metadata.CheckpointMetadata	loadSavepointMetadata(String savepointPath)	Takes the given string (representing a pointer to a checkpoint) and resolves it to a file status for the checkpoint's metadata file.

Methods inherited from class java.lang.Object

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

Method Detail

loadSavepointMetadata

public static org.apache.flink.runtime.checkpoint.metadata.CheckpointMetadata loadSavepointMetadata(String savepointPath)
                                                                                             throws IOException

Takes the given string (representing a pointer to a checkpoint) and resolves it to a file status for the checkpoint's metadata file.

This should only be used when the user code class loader is the current classloader for the thread.

Parameters:

savepointPath - The path to an external savepoint.

Returns:

A state handle to savepoint's metadata.

Throws:

IOException - Thrown, if the path cannot be resolved, the file system not accessed, or the path points to a location that does not seem to be a savepoint.

loadOperatorStateMetadata

public static Map<String,org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot> loadOperatorStateMetadata(String savepointPath,
                                                                                                                        OperatorIdentifier operatorIdentifier)
                                                                                                                 throws IOException

Loads all state metadata for an operator in a single I/O operation.

Parameters:

savepointPath - Path to the savepoint directory

operatorIdentifier - Operator UID or hash

Returns:

Map from state name to StateMetaInfoSnapshot

Throws:

IOException - If reading fails