org.apache.nifi.util

Class FileUtils

java.lang.Object

org.apache.nifi.util.FileUtils

public class FileUtils
extends Object

A utility class containing a few useful static methods to do typical IO operations.

Field Summary

Fields

Modifier and Type	Field and Description
static long	MILLIS_BETWEEN_ATTEMPTS

Constructor Summary

Constructors

Constructor and Description
FileUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static void	deleteFile(File file, boolean recurse)
static boolean	deleteFile(File file, org.slf4j.Logger logger) Deletes the given file.
static boolean	deleteFile(File file, org.slf4j.Logger logger, int attempts) Deletes the given file.
static void	deleteFiles(Collection<File> files, boolean recurse) Deletes given files.
static void	deleteFilesInDir(File directory, FilenameFilter filter, org.slf4j.Logger logger) Deprecated. As of release 0.6.0, replaced by deleteFilesInDirectory(File, FilenameFilter, Logger)
static void	deleteFilesInDir(File directory, FilenameFilter filter, org.slf4j.Logger logger, boolean recurse) Deprecated. As of release 0.6.0, replaced by deleteFilesInDirectory(File, FilenameFilter, Logger, boolean)
static void	deleteFilesInDir(File directory, FilenameFilter filter, org.slf4j.Logger logger, boolean recurse, boolean deleteEmptyDirectories) Deprecated. As of release 0.6.0, replaced by deleteFilesInDirectory(File, FilenameFilter, Logger, boolean, boolean)
static void	deleteFilesInDirectory(File directory, FilenameFilter filter, org.slf4j.Logger logger) Deletes all files (not directories..) in the given directory (non recursive) that match the given filename filter.
static void	deleteFilesInDirectory(File directory, FilenameFilter filter, org.slf4j.Logger logger, boolean recurse) Deletes all files (not directories) in the given directory (recursive) that match the given filename filter.
static void	deleteFilesInDirectory(File directory, FilenameFilter filter, org.slf4j.Logger logger, boolean recurse, boolean deleteEmptyDirectories) Deletes all files (not directories) in the given directory (recursive) that match the given filename filter.
static void	ensureDirectoryExistAndCanAccess(File dir)
static void	sleepQuietly(long millis)

Methods inherited from class java.lang.Object

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

Field Detail

MILLIS_BETWEEN_ATTEMPTS

public static final long MILLIS_BETWEEN_ATTEMPTS

See Also:

Constant Field Values

Constructor Detail

FileUtils

public FileUtils()

Method Detail

ensureDirectoryExistAndCanAccess

public static void ensureDirectoryExistAndCanAccess(File dir)
                                             throws IOException

Throws:

IOException

deleteFile

public static boolean deleteFile(File file,
                 org.slf4j.Logger logger)

Deletes the given file. If the given file exists but could not be deleted this will be printed as a warning to the given logger

Parameters:

file - to delete

logger - to notify

Returns:

true if deleted

deleteFile

public static boolean deleteFile(File file,
                 org.slf4j.Logger logger,
                 int attempts)

Deletes the given file. If the given file exists but could not be deleted this will be printed as a warning to the given logger

Parameters:

file - to delete

logger - to notify

attempts - indicates how many times an attempt to delete should be made

Returns:

true if given file no longer exists

deleteFilesInDir

@Deprecated
public static void deleteFilesInDir(File directory,
                               FilenameFilter filter,
                               org.slf4j.Logger logger)

Deprecated. As of release 0.6.0, replaced by deleteFilesInDirectory(File, FilenameFilter, Logger)

Deletes all files (not directories..) in the given directory (non recursive) that match the given filename filter. If any file cannot be deleted then this is printed at warn to the given logger.

Parameters:

directory - to delete contents of

filter - if null then no filter is used

logger - to notify

deleteFilesInDir

@Deprecated
public static void deleteFilesInDir(File directory,
                               FilenameFilter filter,
                               org.slf4j.Logger logger,
                               boolean recurse)

Deprecated. As of release 0.6.0, replaced by deleteFilesInDirectory(File, FilenameFilter, Logger, boolean)

Deletes all files (not directories) in the given directory (recursive) that match the given filename filter. If any file cannot be deleted then this is printed at warn to the given logger.

Parameters:

directory - to delete contents of

filter - if null then no filter is used

logger - to notify

recurse - true if should recurse

deleteFilesInDir

@Deprecated
public static void deleteFilesInDir(File directory,
                               FilenameFilter filter,
                               org.slf4j.Logger logger,
                               boolean recurse,
                               boolean deleteEmptyDirectories)

Deprecated. As of release 0.6.0, replaced by deleteFilesInDirectory(File, FilenameFilter, Logger, boolean, boolean)

Deletes all files (not directories) in the given directory (recursive) that match the given filename filter. If any file cannot be deleted then this is printed at warn to the given logger.

Parameters:

directory - to delete contents of

filter - if null then no filter is used

logger - to notify

recurse - will look for contents of sub directories.

deleteEmptyDirectories - default is false; if true will delete directories found that are empty

deleteFilesInDirectory

public static void deleteFilesInDirectory(File directory,
                          FilenameFilter filter,
                          org.slf4j.Logger logger)
                                   throws IOException

Deletes all files (not directories..) in the given directory (non recursive) that match the given filename filter. If any file cannot be deleted then this is printed at warn to the given logger.

Parameters:

directory - to delete contents of

filter - if null then no filter is used

logger - to notify

Throws:

IOException - if abstract pathname does not denote a directory, or if an I/O error occurs

deleteFilesInDirectory

public static void deleteFilesInDirectory(File directory,
                          FilenameFilter filter,
                          org.slf4j.Logger logger,
                          boolean recurse)
                                   throws IOException

Deletes all files (not directories) in the given directory (recursive) that match the given filename filter. If any file cannot be deleted then this is printed at warn to the given logger.

Parameters:

directory - to delete contents of

filter - if null then no filter is used

logger - to notify

recurse - true if should recurse

Throws:

IOException - if abstract pathname does not denote a directory, or if an I/O error occurs

deleteFilesInDirectory

public static void deleteFilesInDirectory(File directory,
                          FilenameFilter filter,
                          org.slf4j.Logger logger,
                          boolean recurse,
                          boolean deleteEmptyDirectories)
                                   throws IOException

Deletes all files (not directories) in the given directory (recursive) that match the given filename filter. If any file cannot be deleted then this is printed at warn to the given logger.

Parameters:

directory - to delete contents of

filter - if null then no filter is used

logger - to notify

recurse - will look for contents of sub directories.

deleteEmptyDirectories - default is false; if true will delete directories found that are empty

Throws:

IOException - if abstract pathname does not denote a directory, or if an I/O error occurs

deleteFiles

public static void deleteFiles(Collection<File> files,
               boolean recurse)
                        throws IOException

Deletes given files.

Parameters:

files - to delete

recurse - will recurse

Throws:

IOException - if issues deleting files

deleteFile

public static void deleteFile(File file,
              boolean recurse)
                       throws IOException

Throws:

IOException

sleepQuietly

public static void sleepQuietly(long millis)