Package 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	Description
RocksDBStateDownloader(int restoringThreadNum)
RocksDBStateDownloader(RocksDBStateDataTransferHelper transfer)

Method Summary

Modifier and Type	Method	Description
void	close()
void	transferAllStateDataToDirectory(Collection<StateHandleDownloadSpec> downloadRequests, org.apache.flink.core.fs.ICloseableRegistry 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.ICloseableRegistry 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 AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException