org.apache.flink.contrib.streaming.state

Class RocksDBStateDownloader

java.lang.Object

org.apache.flink.contrib.streaming.state.RocksDBStateDownloader

All Implemented Interfaces:

Closeable, AutoCloseable

public class RocksDBStateDownloader
extends Object
implements Closeable

Help class for downloading RocksDB state files.

Constructor Summary

Constructors

Constructor and Description
RocksDBStateDownloader(int restoringThreadNum)
RocksDBStateDownloader(RocksDBStateDataTransferHelper transfer)

Method Summary

Modifier and Type	Method and Description
void	close()
void	transferAllStateDataToDirectory(Collection<StateHandleDownloadSpec> downloadRequests, org.apache.flink.core.fs.CloseableRegistry closeableRegistry) Transfer all state data to the target directory, as specified in the download requests.

Methods inherited from class java.lang.Object

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

Constructor Detail

RocksDBStateDownloader

@VisibleForTesting
public RocksDBStateDownloader(int restoringThreadNum)

RocksDBStateDownloader

public RocksDBStateDownloader(RocksDBStateDataTransferHelper transfer)

Method Detail

transferAllStateDataToDirectory

public void transferAllStateDataToDirectory(Collection<StateHandleDownloadSpec> downloadRequests,
                                            org.apache.flink.core.fs.CloseableRegistry closeableRegistry)
                                     throws Exception

Transfer all state data to the target directory, as specified in the download requests.

Parameters:

downloadRequests - the list of downloads.

Throws:

Exception - If anything about the download goes wrong.

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException