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org.apache.crunch.test
Class TemporaryPath

java.lang.Object
  org.junit.rules.ExternalResource
      org.apache.crunch.test.TemporaryPath

All Implemented Interfaces:

org.junit.rules.TestRule

public final class TemporaryPath
extends org.junit.rules.ExternalResource

Creates a temporary directory for a test case and destroys it afterwards. This provides a temporary directory like JUnit's TemporaryFolder but geared towards Hadoop applications. Unlike TemporaryFolder, it doesn't create any files or directories except for the root directory itself. Also, getDefaultConfiguration() provides you with a configuration that overrides path properties with temporary directories. You have to specify these properties via the constructor.

Constructor Summary

TemporaryPath(String... confKeys)
Construct TemporaryPath.

Method Summary

org.junit.runners.model.Statement	apply(org.junit.runners.model.Statement base, org.junit.runner.Description description)
File	copyResourceFile(String resourceName) Copy a classpath resource to File.
String	copyResourceFileName(String resourceName) Copy a classpath resource returning its absolute file name.
org.apache.hadoop.fs.Path	copyResourcePath(String resourceName) Copy a classpath resource to a Path.
org.apache.hadoop.conf.Configuration	getDefaultConfiguration()
File	getFile(String fileName) Get a File below the temporary directory.
String	getFileName(String fileName) Get an absolute file name below the temporary directory.
org.apache.hadoop.fs.Path	getPath(String fileName) Get a Path below the temporary directory.
File	getRootFile() Get the root directory which will be deleted automatically.
String	getRootFileName() Get the root directory as an absolute file name.
org.apache.hadoop.fs.Path	getRootPath() Get the root directory as a Path.
org.apache.hadoop.conf.Configuration	overridePathProperties(org.apache.hadoop.conf.Configuration config) Set all keys specified in the constructor to temporary directories.

Methods inherited from class java.lang.Object

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

Constructor Detail

TemporaryPath

public TemporaryPath(String... confKeys)

Construct TemporaryPath.

Parameters:

confKeys - Configuration keys containing directories to override

Method Detail

apply

public org.junit.runners.model.Statement apply(org.junit.runners.model.Statement base,
                                               org.junit.runner.Description description)

Specified by:

apply in interface org.junit.rules.TestRule

Overrides:

apply in class org.junit.rules.ExternalResource

getRootFile

public File getRootFile()

Get the root directory which will be deleted automatically.

getRootPath

public org.apache.hadoop.fs.Path getRootPath()

Get the root directory as a Path.

getRootFileName

public String getRootFileName()

Get the root directory as an absolute file name.

getFile

public File getFile(String fileName)

Get a File below the temporary directory.

getPath

public org.apache.hadoop.fs.Path getPath(String fileName)

Get a Path below the temporary directory.

getFileName

public String getFileName(String fileName)

Get an absolute file name below the temporary directory.

copyResourceFile

public File copyResourceFile(String resourceName)
                      throws IOException

Copy a classpath resource to File.

Throws:

IOException

copyResourcePath

public org.apache.hadoop.fs.Path copyResourcePath(String resourceName)
                                           throws IOException

Copy a classpath resource to a Path.

Throws:

IOException

copyResourceFileName

public String copyResourceFileName(String resourceName)
                            throws IOException

Copy a classpath resource returning its absolute file name.

Throws:

IOException

getDefaultConfiguration

public org.apache.hadoop.conf.Configuration getDefaultConfiguration()

overridePathProperties

public org.apache.hadoop.conf.Configuration overridePathProperties(org.apache.hadoop.conf.Configuration config)

Set all keys specified in the constructor to temporary directories.