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use static call instead of call by reflection

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This commit is contained in:
Taro L. Saito 2011-08-01 18:22:48 +09:00
parent 94b879fe12
commit 8d49dddbba
1 changed files with 64 additions and 47 deletions
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39
src/main/java/org/xerial/snappy/SnappyLoader.java
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@ -170,25 +170,42 @@ public class SnappyLoader
e.printStackTrace(); e.printStackTrace();
throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage()); throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage());
} }
}
// Prepare SnappyNativeLoader or LocalSnappyNativeLoader // Prepare SnappyNativeLoader or LocalSnappyNativeLoader
Class< ? > nativeLoader = prepareNativeLoader(); Class< ? > nativeLoader = prepareNativeLoader();
// Load the code // Load the code
loadNativeLibrary(nativeLoader); loadNativeLibrary(nativeLoader);
}
else {
if (!isLoaded) {
// load locally
File nativeLib = findNativeLibrary();
if (nativeLib != null) {
System.load(nativeLib.getAbsolutePath());
}
else {
// Load preinstalled snappyjava (in the path -Djava.library.path)
System.loadLibrary("snappyjava");
}
try {
api = (SnappyNativeAPI) Class.forName("org.xerial.snappy.SnappyNative").newInstance();
isLoaded = true;
}
catch (Exception e) {
e.printStackTrace(System.err);
throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage());
}
}
}
return api; return api;
} }
private static Class< ? > prepareNativeLoader() { private static Class< ? > prepareNativeLoader() {
boolean useNativeCodeInjection = !Boolean.parseBoolean(System.getProperty(KEY_SNAPPY_DISABLE_NATIVE_INJECTION,
"false"));
try { try {
if (!useNativeCodeInjection) {
// Use the local loader
return LocalSnappyNativeLoader.class;
}
else {
// Use parent class loader to load SnappyNative, since Tomcat, which uses different class loaders for each webapps, cannot load JNI interface twice // Use parent class loader to load SnappyNative, since Tomcat, which uses different class loaders for each webapps, cannot load JNI interface twice
final String nativeLoaderClassName = "org.xerial.snappy.SnappyNativeLoader"; final String nativeLoaderClassName = "org.xerial.snappy.SnappyNativeLoader";
@ -205,8 +222,8 @@ public class SnappyLoader
// Create SnappyNative class from a byte code // Create SnappyNative class from a byte code
Class< ? > classLoader = Class.forName("java.lang.ClassLoader"); Class< ? > classLoader = Class.forName("java.lang.ClassLoader");
Method defineClass = classLoader.getDeclaredMethod("defineClass", new Class[] { String.class, Method defineClass = classLoader.getDeclaredMethod("defineClass", new Class[] { String.class, byte[].class,
byte[].class, int.class, int.class }); int.class, int.class });
//ProtectionDomain pd = System.class.getProtectionDomain(); //ProtectionDomain pd = System.class.getProtectionDomain();
@ -228,7 +245,7 @@ public class SnappyLoader
// Load the SnappyNativeLoader class // Load the SnappyNativeLoader class
return rootClassLoader.loadClass(nativeLoaderClassName); return rootClassLoader.loadClass(nativeLoaderClassName);
}
} }
catch (Exception e) { catch (Exception e) {
e.printStackTrace(System.err); e.printStackTrace(System.err);