看看org.hibernate.internal.util.ClassLoaderHelper。
您只需要用ClassLoader替換ClassLoader即可解析實體類。 Hibernate-Osgi也將其設置爲OSGI ClassLoader(請參閱org.hibernate.osgi.HibernateBundleActivator)。因此,建議如下:
BundleWideClassLoader cl = new BundleWideClassLoader();
if (ClassLoaderHelper.overridenClassLoader != null
&& ClassLoaderHelper.overridenClassLoader instanceof OsgiClassLoader)
{
OsgiClassLoader ocl = (OsgiClassLoader)ClassLoaderHelper.overridenClassLoader;
for (Bundle b : cl.getBundles()) {
ocl.addBundle(b);
}
} else {
ClassLoaderHelper.overridenClassLoader = new BundleWideClassLoader();
}
我把這個給我HibernateConfiguration類通過重寫buildSessionFactory執行該程序,並返回super.buildSessionFactory。
的BundleWideClassLoader看起來像這樣
public class BundleWideClassLoader extends ClassLoader
{
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
for (BundleClassLoader cl : this.getAllClassLoader()) {
try {
Class clazz = cl.findClass(name);
return clazz;
} catch (Exception ex) {
}
}
throw new ClassNotFoundException(name);
}
@Override
protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
Class clazz = this.findClass(name);
if (resolve) {
this.resolveClass(clazz);
}
return clazz;
}
@Override
public URL findResource(String name) {
for (BundleClassLoader cl : this.getAllClassLoader()) {
URL ret = cl.findResource(name);
if (ret != null) {
return ret;
}
}
return null;
}
/**
* Returns a list of all available BundleClassLoader.
*
* @return classloader
*/
public HashSet<BundleClassLoader> getAllClassLoader() {
//
// Do some magic here to get your ClassLoaders from all of your Bundles
//
}
/**
* Returns a list of all bundles which are registered in this BundleWideClassLoader.
*
* @return list of managed bundles
*/
public HashSet<Bundle> getBundles() {
HashSet<Bundle> bundles = new HashSet<>();
for (BundleClassLoader cl : this.getAllClassLoader()) {
bundles.add(cl.getBundleContext().getBundle());
}
return bundles;
}
}
最後的BundleClassLoader:
public class BundleClassLoader extends ClassLoader
{
/**
* Bundle context.
*/
private BundleContext context;
/**
* Constructor.
* @param ctx Bundle Context
*/
public BundleClassLoader(BundleContext ctx) {
this.context = ctx;
}
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
return this.context.getBundle().loadClass(name);
}
@Override
protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
Class clazz = this.findClass(name);
if (resolve) {
this.resolveClass(clazz);
}
return clazz;
}
@Override
public URL findResource(String name) {
return this.context.getBundle().getResource(name);
}
/**
* Returns bundle context.
* @return bundle context
*/
public BundleContext getBundleContext() {
return this.context;
}
}
我建議建立在每個BundleActivators新BundleClassLoader並將其添加到某種註冊表使BundleWideClassLoader可以從那裏獲得BundleClassLoader的列表。當捆綁包停止或移除時,不要忘記刪除BundleClassLoader。
創建https://hibernate.atlassian.net/browse/HHH-8658 - 歡迎評論。 – brmeyer
感謝brmeyer獲取有價值的信息,但我們轉移到了jdbc。 – sailor