org.apache.hadoop.util

Class NativeCodeLoader

java.lang.Object

org.apache.hadoop.util.NativeCodeLoader

@InterfaceAudience.Private
 @InterfaceStability.Unstable
public class NativeCodeLoader
extends Object

A helper to load the native hadoop code i.e. libhadoop.so. This handles the fallback to either the bundled libhadoop-Linux-i386-32.so or the default java implementations where appropriate.

Constructor Summary

Constructors

Constructor and Description
NativeCodeLoader()

Method Summary

Modifier and Type	Method and Description
static boolean	buildSupportsOpenssl() Returns true only if this build was compiled with support for openssl.
static boolean	buildSupportsSnappy() Returns true only if this build was compiled with support for snappy.
static String	getLibraryName()
boolean	getLoadNativeLibraries(Configuration conf) Return if native hadoop libraries, if present, can be used for this job.
static boolean	isNativeCodeLoaded() Check if native-hadoop code is loaded for this platform.
void	setLoadNativeLibraries(Configuration conf, boolean loadNativeLibraries) Set if native hadoop libraries, if present, can be used for this job.

Methods inherited from class java.lang.Object

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

Constructor Detail

NativeCodeLoader

public NativeCodeLoader()

Method Detail

isNativeCodeLoaded

public static boolean isNativeCodeLoaded()

Check if native-hadoop code is loaded for this platform.

Returns:

true if native-hadoop is loaded, else false

buildSupportsSnappy

public static boolean buildSupportsSnappy()

Returns true only if this build was compiled with support for snappy.

buildSupportsOpenssl

public static boolean buildSupportsOpenssl()

Returns true only if this build was compiled with support for openssl.

getLibraryName

public static String getLibraryName()

getLoadNativeLibraries

public boolean getLoadNativeLibraries(Configuration conf)

Return if native hadoop libraries, if present, can be used for this job.

Parameters:

conf - configuration

Returns:

true if native hadoop libraries, if present, can be used for this job; false otherwise.

setLoadNativeLibraries

public void setLoadNativeLibraries(Configuration conf,
                                   boolean loadNativeLibraries)

Set if native hadoop libraries, if present, can be used for this job.

Parameters:

conf - configuration

loadNativeLibraries - can native hadoop libraries be loaded