Package org.apache.datafusion

Class NativeLibraryLoader

java.lang.Object

org.apache.datafusion.NativeLibraryLoader

public final class NativeLibraryLoader
extends Object

Loads the datafusion_jni native library on demand.

The loader first tries System.loadLibrary(String) so that operators can override the bundled library by placing a build on java.library.path (for example via -Djava.library.path=... or LD_LIBRARY_PATH). If that fails the loader extracts the platform-specific library from the JAR resource tree and loads it via System.load(String).

The bundled libraries live at the conventional path org/apache/datafusion/<os>/<arch>/<libfile>. Each JVM extracts into its own private temporary directory created with Files.createTempDirectory(String, java.nio.file.attribute.FileAttribute[]), which is mode 0700 on POSIX and user-private under the default Windows TMP. Keeping the directory private prevents another user on the host from planting a same-named library for the JVM to pick up.

Method Summary

Modifier and Type	Method	Description
static void	loadLibrary()

Methods inherited from class java.lang.Object

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

Method Details

loadLibrary

public static void loadLibrary()