org.apache.flink.runtime.filecache

Class FileCache

java.lang.Object

org.apache.flink.runtime.filecache.FileCache

public class FileCache
extends Object

The FileCache is used to create the local files for the registered cache files when a task is deployed. The files will be removed when the task is unregistered after a 5 second delay. A given file x will be placed in "/tmp_/".

Constructor Summary

Constructors

Constructor and Description
FileCache()

Method Summary

Methods

Modifier and Type	Method and Description
static void	copy(Path sourcePath, Path targetPath, boolean executable)
FutureTask<Path>	createTmpFile(String name, DistributedCache.DistributedCacheEntry entry, JobID jobID) If the file doesn't exists locally, it will copy the file to the temp directory.
void	deleteTmpFile(String name, DistributedCache.DistributedCacheEntry entry, JobID jobID) Deletes the local file after a 5 second delay.
Path	getTempDir(JobID jobID, String childPath)
void	shutdown()

Methods inherited from class java.lang.Object

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

Constructor Detail

FileCache

public FileCache()

Method Detail

createTmpFile

public FutureTask<Path> createTmpFile(String name,
                             DistributedCache.DistributedCacheEntry entry,
                             JobID jobID)

If the file doesn't exists locally, it will copy the file to the temp directory.

Parameters:

name - file identifier

entry - entry containing all relevant information

jobID -

Returns:

copy task

deleteTmpFile

public void deleteTmpFile(String name,
                 DistributedCache.DistributedCacheEntry entry,
                 JobID jobID)

Deletes the local file after a 5 second delay.

Parameters:

name - file identifier

entry - entry containing all relevant information

jobID -

getTempDir

public Path getTempDir(JobID jobID,
              String childPath)

shutdown

public void shutdown()

copy

public static void copy(Path sourcePath,
        Path targetPath,
        boolean executable)
                 throws IOException

Throws:

IOException