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org.kevoree.extra.fota/org.kevoree.fota.api/org.kevoree.extra.fota.api.iml
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org.kevoree.extra.fota/org.kevoree.fota.api/src/main/java/org/kevoree/fota/HelloWorld.java
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|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| package org.kevoree.fota; | ||
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| import org.kevoree.fota.utils.ClassLoaderUtil; | ||
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| import java.lang.reflect.Method; | ||
| import java.net.URLClassLoader; | ||
| import java.util.LinkedList; | ||
| import java.util.List; | ||
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| /** | ||
| * Created with IntelliJ IDEA. | ||
| * User: jed | ||
| * Date: 30/07/12 | ||
| * Time: 10:14 | ||
| * To change this template use File | Settings | File Templates. | ||
| */ | ||
| public class HelloWorld { | ||
| private native void print(); | ||
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| private static List<ClassLoader> loaders = new LinkedList<ClassLoader>(); | ||
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| public static void main(String[] args) throws Exception { | ||
| for (int i = 0; i < 3; i++) { | ||
| // Clone the current class loader. Use null as parent, so that no classes (but the standard java | ||
| // classes) are ever shared. | ||
| URLClassLoader loader = new URLClassLoader(((URLClassLoader) HelloWorld.class.getClassLoader()).getURLs(), null); | ||
| //Just to make sure the classloader is not GCed. | ||
| loaders.add(loader); | ||
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| Class main; | ||
| main = loader.loadClass(HelloWorld.class.getName()); | ||
| Method start = main.getMethod("start", new Class[0]); | ||
| start.invoke(null, new Object[0]); | ||
| //Now clear the dlls cache so that another classloader can load the same | ||
| List<String> dlls = new LinkedList<String>(); | ||
| dlls.add("HelloWorld.dll"); | ||
| ClassLoaderUtil.closeDLLs(loader, dlls); | ||
| } | ||
| } | ||
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| public static void start() { | ||
| try { | ||
| System.loadLibrary("HelloWorld"); | ||
| new HelloWorld().print(); | ||
| } catch (Throwable th) { | ||
| th.printStackTrace(); | ||
| } | ||
| } | ||
|
|
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| } |
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...extra.fota/org.kevoree.fota.api/src/main/java/org/kevoree/fota/utils/ClassLoaderUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| package org.kevoree.fota.utils; | ||
|
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| /** | ||
| * Created with IntelliJ IDEA. | ||
| * User: jed | ||
| * Date: 30/07/12 | ||
| * Time: 09:45 | ||
| * To change this template use File | Settings | File Templates. | ||
| */ | ||
| import java.lang.reflect.Field; | ||
| import java.net.URLClassLoader; | ||
| import java.text.MessageFormat; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import java.util.Vector; | ||
|
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|
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| /** | ||
| * Provides utility functions related to URLClassLoaders or subclasses of it. | ||
| * | ||
| */ | ||
| public class ClassLoaderUtil { | ||
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| private static final String CLASSLOADER_LOADED_LIBRARY_NAMES = "loadedLibraryNames"; //$NON-NLS-1$ | ||
| private static final String CLASSLOADER_NATIVE_LIBRARIES = "nativeLibraries"; //$NON-NLS-1$ | ||
| private static final String CLASSLOADER_NATIVELIBRARY_INNER_CLASS_NAME = "java.lang.ClassLoader$NativeLibrary"; //$NON-NLS-1$ | ||
| private static final String CLASSLOADER_NATIVELIBRARY_FIELD_NAME = "name"; //$NON-NLS-1$ | ||
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| /* Fields used during processing - they can be set up once and then used repeatedly */ | ||
| private static Class classLoaderInnerClass; | ||
| private static Field loadedLibNamesField; | ||
| private static Field nativeLibsField; | ||
| private static Field nameField; | ||
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| private static boolean initDone = false; | ||
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| /** | ||
| *Initializes the class. | ||
| *<p> | ||
| *Each utility method should invoke init() before doing their own work | ||
| *to make sure the initialization is done. | ||
| *@throws any Throwable detected during static init. | ||
| */ | ||
| private static void init() throws Throwable { | ||
| if ( ! initDone) { | ||
| initForClosingDlls(); | ||
| initDone = true; | ||
| } | ||
| } | ||
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| /** | ||
| *Sets up variables used in closing a loader's jar files. | ||
| *@throws NoSuchFieldException in case a field of interest is not found where expected | ||
| */ | ||
| private static void initForClosingDlls() throws NoSuchFieldException { | ||
| classLoaderInnerClass = getInnerClass(ClassLoader.class, CLASSLOADER_NATIVELIBRARY_INNER_CLASS_NAME); | ||
| nameField = getField(classLoaderInnerClass, CLASSLOADER_NATIVELIBRARY_FIELD_NAME); | ||
| loadedLibNamesField = getField(ClassLoader.class, CLASSLOADER_LOADED_LIBRARY_NAMES); | ||
| nativeLibsField = getField(ClassLoader.class, CLASSLOADER_NATIVE_LIBRARIES); | ||
| } | ||
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| /** | ||
| *Retrieves a Field object for a given field on the specified class, having | ||
| *set it accessible. | ||
| *@param cls the Class on which the field is expected to be defined | ||
| *@param fieldName the name of the field of interest | ||
| *@throws NoSuchFieldException in case of any error retriving information about the field | ||
| */ | ||
| private static Field getField(Class cls, String fieldName) throws NoSuchFieldException { | ||
| try { | ||
| Field field = cls.getDeclaredField(fieldName); | ||
| field.setAccessible(true); | ||
| return field; | ||
| } catch (NoSuchFieldException nsfe) { | ||
| NoSuchFieldException e = new NoSuchFieldException (getMessage("classloaderutil.errorGettingField", fieldName)); //$NON-NLS-1$ | ||
| e.initCause(nsfe); | ||
| throw e; | ||
| } | ||
| } | ||
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| /** | ||
| *Retrieves a given inner class definition from the specified outer class. | ||
| *@param cls the outer Class | ||
| *@param innerClassName the fully-qualified name of the inner class of interest | ||
| */ | ||
| private static Class getInnerClass(Class cls, String innerClassName) { | ||
| Class result = null; | ||
| Class [] innerClasses = cls.getDeclaredClasses(); | ||
| for (Class c : innerClasses) { | ||
| if (c.getName().equals(innerClassName)) { | ||
| result = c; | ||
| break; | ||
| } | ||
| } | ||
| return result; | ||
| } | ||
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| //Just a workaround. couldn't find an alternate to close dll connections. | ||
| public static void closeDLLs(URLClassLoader classLoader, List<String> dlls) { | ||
| try { | ||
| init(); | ||
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| Vector<String> loadedLibNames = (Vector) loadedLibNamesField.get(classLoader); | ||
| Vector nativeLibs = (Vector) nativeLibsField.get(classLoader); | ||
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| synchronized (loadedLibNames) { | ||
| for (int index = 0; index < dlls.size(); index++) { | ||
| Iterator<String> iter = loadedLibNames.iterator(); | ||
| while (iter.hasNext()) { | ||
| String libName = iter.next(); | ||
| if (libName != null && libName.indexOf(dlls.get(index)) != -1) { | ||
| iter.remove(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| synchronized (nativeLibs) { | ||
| for (int index = 0; index < dlls.size(); index++) { | ||
| Iterator nIter = nativeLibs.iterator(); | ||
| while (nIter.hasNext()) { | ||
| Object ClassLoader$NativeLibrary = nIter.next(); | ||
| String name = (String) nameField.get(ClassLoader$NativeLibrary); | ||
| if (name != null && name.indexOf(dlls.get(index)) != -1) { | ||
| nIter.remove(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } catch (Throwable th) { | ||
| // ignore | ||
| } | ||
| } | ||
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| /** | ||
| *Returns a formatted string, using the key to find the full message and | ||
| *substituting any parameters. | ||
| *@param key the message key with which to locate the message of interest | ||
| *@param o the object(s), if any, to be substituted into the message | ||
| *@return a String containing the formatted message | ||
| */ | ||
| private static String getMessage(String key, Object ... o) { | ||
| return MessageFormat.format(key, o); | ||
| } | ||
| } |
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org.kevoree.extra.fota/org.kevoree.fota.api/src/main/resources/nix32/native.so
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org.kevoree.extra.fota/org.kevoree.fota.native/nix32/org.kevoree.extra.fota.native.nix32.iml
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