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snappy-java
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Split the loader code

This commit is contained in:
Taro L. Saito 2011-08-01 16:43:25 +09:00
parent f7a0619f64
commit 875235229c
1 changed files with 34 additions and 26 deletions
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48
src/main/java/org/xerial/snappy/SnappyLoader.java
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@ -159,24 +159,41 @@ public class SnappyLoader
"false"));
// Use parent class loader to load SnappyNative, since Tomcat, which uses different class loaders for each webapps, cannot load JNI interface twice
ClassLoader rootClassLoader = getRootClassLoader();
if (useNativeCodeInjection) {
try {
if (!useNativeCodeInjection) {
// Use the local loader
Class< ? > loaderClass = LocalSnappyNativeLoader.class;
loadNativeLibrary(loaderClass);
}
else {
Class< ? > c = Class.forName(nativeLoaderClassName);
// If this native loader class is already defined, it means that another class loader already loaded the native library of snappy
api = (SnappyNativeAPI) Class.forName("org.xerial.snappy.SnappyNative").newInstance();
}
isLoaded = true;
return api;
}
catch (ClassNotFoundException e) {
try {
// do loading
}
catch (Exception e) {
e.printStackTrace();
throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage());
}
}
Class< ? > nativeLoader = prepareNativeLoader();
loadNativeLibrary(nativeLoader);
return api;
}
private static Class< ? > prepareNativeLoader() {
boolean useNativeCodeInjection = !Boolean.parseBoolean(System.getProperty(KEY_SNAPPY_DISABLE_NATIVE_INJECTION,
"false"));
if (!useNativeCodeInjection) {
// Use the local loader
return LocalSnappyNativeLoader.class;
}
else {
try {
final String nativeLoaderClassName = "org.xerial.snappy.SnappyNativeLoader";
ClassLoader rootClassLoader = getRootClassLoader();
// Load a byte code
byte[] byteCode = getByteCode("/org/xerial/snappy/SnappyNativeLoader.bytecode");
// In addition, we need to load the other dependent classes (e.g., SnappyNative and SnappyException) using the system class loader
@ -211,22 +228,13 @@ public class SnappyLoader
}
// Load the SnappyNativeLoader class
Class< ? > loaderClass = rootClassLoader.loadClass(nativeLoaderClassName);
loadNativeLibrary(loaderClass);
return api;
}
catch (ClassNotFoundException ee) {
throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, ee.getMessage());
}
catch (Exception e2) {
e2.printStackTrace(System.err);
throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e2.getMessage());
}
return rootClassLoader.loadClass(nativeLoaderClassName);
}
catch (Exception e) {
e.printStackTrace(System.err);
throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage());
}
}
}