com.asakusafw.runtime.util.hadoop

Class ConfigurationProvider

java.lang.Object

com.asakusafw.runtime.util.hadoop.ConfigurationProvider

Direct Known Subclasses:

ConfigurationFactory

public class ConfigurationProvider
extends Object

Creates Configurations with system defaults.

Since:

0.4.0

Version:

0.7.2

Constructor Summary

Constructors

Constructor and Description
ConfigurationProvider() Creates a new instance.
ConfigurationProvider(URL defaultConfigPath) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
protected void	configure(org.apache.hadoop.conf.Configuration configuration) Configures before newInstance() returns the configuration object.
static File	findHadoopCommand() Searches for the installed hadoop command.
static File	findHadoopCommand(Map<String,String> environmentVariables) Computes the default Hadoop command path.
static URL	getConfigurationPath(Map<String,String> environmentVariables) Computes the default Hadoop configuration path.
org.apache.hadoop.conf.Configuration	newInstance() Creates a new default configuration.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConfigurationProvider

public ConfigurationProvider()

Creates a new instance.

ConfigurationProvider

public ConfigurationProvider(URL defaultConfigPath)

Creates a new instance.

Parameters:

defaultConfigPath - the default configuration path

Method Detail

getConfigurationPath

public static URL getConfigurationPath(Map<String,String> environmentVariables)

Computes the default Hadoop configuration path.

Parameters:

environmentVariables - the current environment variables

Returns:

the detected configuration path, or null if the configuration path is not found

Since:

0.6.0

findHadoopCommand

public static File findHadoopCommand()

Searches for the installed hadoop command.

Returns:

the found one, or null if not found

findHadoopCommand

public static File findHadoopCommand(Map<String,String> environmentVariables)

Computes the default Hadoop command path.

Parameters:

environmentVariables - the current environment variables

Returns:

the detected command path, or null if the command path is not found

Since:

0.6.0

newInstance

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

Creates a new default configuration.

Returns:

the created configuration

configure

protected void configure(org.apache.hadoop.conf.Configuration configuration)

Configures before newInstance() returns the configuration object.

Parameters:

configuration - the configuration