org.gridgain.grid.ggfs

Interface GridGgfsFile

public interface GridGgfsFile

GGFS file or directory descriptor. For example, to get information about a file you would use the following code:

     GridGgfsPath filePath = new GridGgfsPath("my/working/dir", "file.txt");

     // Get metadata about file.
     GridGgfsFile file = ggfs.info(filePath);
 

Method Summary

Methods

Modifier and Type	Method and Description
long	accessTime() Gets file last access time.
int	blockSize() Gets file's data block size.
long	groupBlockSize() Gets file group block size (i.e.
boolean	isDirectory() Check this file is a directory.
boolean	isFile() Check this file is a data file.
long	length() Gets file's length.
long	modificationTime() Gets file last modification time.
GridGgfsPath	path() Gets path to file.
Map<String,String>	properties() Get properties of the file.
String	property(String name) Get file's property for specified name.
String	property(String name, String dfltVal) Get file's property for specified name.

Method Detail

path

GridGgfsPath path()

Gets path to file.

Returns:

Path to file.

isFile

boolean isFile()

Check this file is a data file.

Returns:

True if this is a data file.

isDirectory

boolean isDirectory()

Check this file is a directory.

Returns:

True if this is a directory.

length

long length()

Gets file's length.

Returns:

File's length or zero for directories.

blockSize

int blockSize()

Gets file's data block size.

Returns:

File's data block size or zero for directories.

groupBlockSize

long groupBlockSize()

Gets file group block size (i.e. block size * group size).

Returns:

File group block size.

accessTime

long accessTime()

Gets file last access time. File last access time is not updated automatically due to performance considerations and can be updated on demand with GridGgfs.setTimes(GridGgfsPath, long, long) method.

By default last access time equals file creation time.

Returns:

Last access time.

modificationTime

long modificationTime()

Gets file last modification time. File modification time is updated automatically on each file write and append.

Returns:

Last modification time.

property

String property(String name)
                throws IllegalArgumentException

Get file's property for specified name.

Parameters:

name - Name of the property.

Returns:

File's property for specified name.

Throws:

IllegalArgumentException - If requested property was not found.

property

@Nullable
String property(String name,
                       @Nullable
                       String dfltVal)

Get file's property for specified name.

Parameters:

name - Name of the property.

dfltVal - Default value if requested property was not found.

Returns:

File's property for specified name.

properties

Map<String,String> properties()

Get properties of the file.

Returns:

Properties of the file.