org.apache.giraph.utils

Class FileUtils

java.lang.Object

org.apache.giraph.utils.FileUtils

public class FileUtils
extends Object

Helper class for filesystem operations during testing

Method Summary

Modifier and Type	Method and Description
static File	createTempDir(File parent, String name) Make a temporary directory.
static File	createTempFile(File parent, String name) Make a temporary file.
static File	createTestDir(String computationName) Create a temporary folder that will be removed after the test.
static File	createTestTempFileOrDir(File parent, String name, boolean dir) Create a test temp file or directory.
static void	delete(File dir) Recursively delete a directory
static void	deletePath(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path path) Helper method to remove a path if it exists.
static void	deletePath(org.apache.hadoop.conf.Configuration conf, String path) Helper method to remove a path if it exists.
static void	writeLines(File file, String[] lines) Write lines to a file.

Methods inherited from class java.lang.Object

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

Method Detail

createTestDir

public static File createTestDir(String computationName)
                          throws IOException

Create a temporary folder that will be removed after the test.

Parameters:

computationName - Used for generating the folder name.

Returns:

File object for the directory.

Throws:

IOException

createTempFile

public static File createTempFile(File parent,
                                  String name)
                           throws IOException

Make a temporary file.

Parameters:

parent - Parent directory.

name - File name.

Returns:

File object to temporary file.

Throws:

IOException

createTempDir

public static File createTempDir(File parent,
                                 String name)
                          throws IOException

Make a temporary directory.

Parameters:

parent - Parent directory.

name - Directory name.

Returns:

File object to temporary file.

Throws:

IOException

createTestTempFileOrDir

public static File createTestTempFileOrDir(File parent,
                                           String name,
                                           boolean dir)
                                    throws IOException

Create a test temp file or directory.

Parameters:

parent - Parent directory

name - Name of file

dir - Is directory?

Returns:

File object

Throws:

IOException

writeLines

public static void writeLines(File file,
                              String[] lines)
                       throws IOException

Write lines to a file.

Parameters:

file - File to write lines to

lines - Strings written to the file

Throws:

IOException

delete

public static void delete(File dir)

Recursively delete a directory

Parameters:

dir - Directory to delete

deletePath

public static void deletePath(org.apache.hadoop.conf.Configuration conf,
                              String path)
                       throws IOException

Helper method to remove a path if it exists.

Parameters:

conf - Configuration to load FileSystem from

path - Path to remove

Throws:

IOException

deletePath

public static void deletePath(org.apache.hadoop.conf.Configuration conf,
                              org.apache.hadoop.fs.Path path)
                       throws IOException

Helper method to remove a path if it exists.

Parameters:

conf - Configuration to load FileSystem from

path - Path to remove

Throws:

IOException