com.asakusafw.runtime.stage.launcher

Class ApplicationLauncher

java.lang.Object

com.asakusafw.runtime.stage.launcher.ApplicationLauncher

public final class ApplicationLauncher
extends Object

W The Asakusa application launcher.

Since:

0.7.0

Version:

0.7.1

Field Summary

Fields

Modifier and Type	Field and Description
static int	CLIENT_ERROR Exception occurred in the application.
static String	KEY_LAUNCHER_USED The configuration key of whether the application may be launched via ApplicationLauncher.
static int	LAUNCH_ERROR Failed to prepare the application.

Method Summary

Modifier and Type	Method and Description
static void	disposeClassLoader(ClassLoader classLoader) Disposes the target class loader.
static int	exec(org.apache.hadoop.conf.Configuration configuration, String... args) Executes launcher.
static int	exec(String... args) Executes launcher with default configuration.
static void	main(String... args) The program entry.
static ClassLoader	switchContextClassLoader(ClassLoader classLoader) Sets the context class loader and returns the current one.

Methods inherited from class java.lang.Object

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

Field Detail

KEY_LAUNCHER_USED

public static final String KEY_LAUNCHER_USED

The configuration key of whether the application may be launched via ApplicationLauncher. This will be only set by this class.

See Also:

Constant Field Values

LAUNCH_ERROR

public static final int LAUNCH_ERROR

Failed to prepare the application.

See Also:

Constant Field Values

CLIENT_ERROR

public static final int CLIENT_ERROR

Exception occurred in the application.

See Also:

Constant Field Values

Method Detail

main

public static void main(String... args)

The program entry.

Parameters:

args - the launcher arguments

exec

public static int exec(String... args)

Executes launcher with default configuration.

Parameters:

args - the launcher arguments

Returns:

the exit status

exec

public static int exec(org.apache.hadoop.conf.Configuration configuration,
                       String... args)

Executes launcher.

Parameters:

configuration - the Hadoop configuration for the application

args - the launcher arguments

Returns:

the exit status

switchContextClassLoader

public static ClassLoader switchContextClassLoader(ClassLoader classLoader)

Sets the context class loader and returns the current one.

Parameters:

classLoader - the new context class loader

Returns:

the current context class loader

Since:

0.7.1

disposeClassLoader

public static void disposeClassLoader(ClassLoader classLoader)

Disposes the target class loader.

Parameters:

classLoader - the class loader

Since:

0.7.1