org.apache.hadoop.util

类 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.

构造器概要

构造器

构造器和说明
NativeCodeLoader()

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 java.lang.Object

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

构造器详细资料

NativeCodeLoader

public NativeCodeLoader()

方法详细资料

isNativeCodeLoaded

public static boolean isNativeCodeLoaded()

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

返回:

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.

参数:

conf - configuration

返回:

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.

参数:

conf - configuration

loadNativeLibraries - can native hadoop libraries be loaded