dorkbox
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Utilities
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more robust native loader

This commit is contained in:
nathan 2018-04-04 15:25:25 +02:00
parent a9966f4e58
commit 6d0db1f53f
1 changed files with 27 additions and 12 deletions
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39
src/dorkbox/util/NativeLoader.java
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@ -19,10 +19,9 @@ import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.rmi.server.ExportException;
import io.netty.util.internal.PlatformDependent;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Loads the specified library, extracting it from the jar, if necessary
@ -31,7 +30,7 @@ public
class NativeLoader {
public static
void loadLibrary(final String sourceFileName, final String destinationPrefix, final Class<?> classLoaderClass, String version)
File extractLibrary(final String sourceFileName, final String destinationDirectory, final String destinationName, String version)
throws Exception {
try {
String suffix;
@ -45,15 +44,18 @@ class NativeLoader {
suffix = ".dylib";
}
final String outputFileName = destinationPrefix + "." + version + suffix;
final File file = new File(OS.TEMP_DIR, outputFileName);
if (!file.canRead()) {
ClassLoader loader = PlatformDependent.getClassLoader(classLoaderClass);
URL url = loader.getResource(sourceFileName);
final String outputFileName;
if (version == null) {
outputFileName = destinationName + suffix;
}
else {
outputFileName = destinationName + "." + version + suffix;
}
final File file = new File(destinationDirectory, outputFileName);
if (!file.canRead() || file.length() == 0 || !file.canExecute()) {
// now we copy it out
final InputStream inputStream = url.openStream();
final InputStream inputStream = LocationResolver.getResourceAsStream(sourceFileName);
OutputStream outStream = null;
try {
@ -82,12 +84,25 @@ class NativeLoader {
}
}
System.load(file.getAbsolutePath());
return file;
} catch (Exception e) {
throw new ExportException("Error extracting library: " + sourceFileName, e);
}
}
public static
void loadLibrary(final File file) {
// inject into the correct classloader
AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public
Object run() {
System.load(file.getAbsolutePath());
return null;
}
});
}
private
NativeLoader() {
}