org.xerial.snappy

Class SnappyLoader

java.lang.Object

org.xerial.snappy.SnappyLoader

public class SnappyLoader
extends Object

Internal only - Do not use this class. This class loads a native library of snappy-java (snappyjava.dll, libsnappy.so, etc.) according to the user platform (os.name and os.arch). The natively compiled libraries bundled to snappy-java contain the codes of the original snappy and JNI programs to access Snappy. In default, no configuration is required to use snappy-java, but you can load your own native library created by 'make native' command. This SnappyLoader searches for native libraries (snappyjava.dll, libsnappy.so, etc.) in the following order:

1. If system property org.xerial.snappy.use.systemlib is set to true, lookup folders specified by java.lib.path system property (This is the default path that JVM searches for native libraries)
2. (System property: org.xerial.snappy.lib.path)/(System property: org.xerial.lib.name)
3. One of the libraries embedded in snappy-java-(version).jar extracted into (System property: java.io.tempdir). If org.xerial.snappy.tempdir is set, use this folder instead of java.io.tempdir.

If you do not want to use folder java.io.tempdir, set the System property org.xerial.snappy.tempdir. For example, to use /tmp/leo as a temporary folder to copy native libraries, use -D option of JVM:

 
 java -Dorg.xerial.snappy.tempdir="/tmp/leo" ...
 
 

Author:

leo

Field Summary

Fields

Modifier and Type	Field and Description
static String	KEY_SNAPPY_DISABLE_BUNDLED_LIBS
static String	KEY_SNAPPY_LIB_NAME
static String	KEY_SNAPPY_LIB_PATH
static String	KEY_SNAPPY_TEMPDIR
static String	KEY_SNAPPY_USE_SYSTEMLIB
static String	SNAPPY_SYSTEM_PROPERTIES_FILE

Constructor Summary

Constructors

Constructor and Description
SnappyLoader()

Method Summary

Methods

Modifier and Type	Method and Description
static String	getVersion() Get the snappy-java version by reading pom.properties embedded in jar.
static boolean	isNativeLibraryLoaded()

Methods inherited from class java.lang.Object

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

Field Detail

SNAPPY_SYSTEM_PROPERTIES_FILE

public static final String SNAPPY_SYSTEM_PROPERTIES_FILE

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Constant Field Values

KEY_SNAPPY_LIB_PATH

public static final String KEY_SNAPPY_LIB_PATH

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Constant Field Values

KEY_SNAPPY_LIB_NAME

public static final String KEY_SNAPPY_LIB_NAME

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Constant Field Values

KEY_SNAPPY_TEMPDIR

public static final String KEY_SNAPPY_TEMPDIR

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Constant Field Values

KEY_SNAPPY_USE_SYSTEMLIB

public static final String KEY_SNAPPY_USE_SYSTEMLIB

See Also:

Constant Field Values

KEY_SNAPPY_DISABLE_BUNDLED_LIBS

public static final String KEY_SNAPPY_DISABLE_BUNDLED_LIBS

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Constant Field Values

Constructor Detail

SnappyLoader

public SnappyLoader()

Method Detail

isNativeLibraryLoaded

public static boolean isNativeLibraryLoaded()

getVersion

public static String getVersion()

Get the snappy-java version by reading pom.properties embedded in jar. This version data is used as a suffix of a dll file extracted from the jar.

Returns:

the version string