94 lines
3.5 KiB
Java
94 lines
3.5 KiB
Java
/*
|
|
* Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
import java.net.MalformedURLException;
|
|
import java.net.URL;
|
|
import java.net.URLClassLoader;
|
|
import java.util.concurrent.ConcurrentHashMap;
|
|
import java.util.concurrent.locks.*;
|
|
import java.lang.reflect.*;
|
|
|
|
public class DelegatingLoader extends URLClassLoader {
|
|
|
|
private DelegatingLoader delLoader;
|
|
private String[] delClasses;
|
|
|
|
static {
|
|
boolean supportParallel = false;
|
|
try {
|
|
Class c = Class.forName("java.lang.ClassLoader");
|
|
Method m = c.getDeclaredMethod("registerAsParallelCapable",
|
|
new Class[0]);
|
|
m.setAccessible(true);
|
|
Object result = (Boolean) m.invoke(null);
|
|
if (result instanceof Boolean) {
|
|
supportParallel = ((Boolean) result).booleanValue();
|
|
} else {
|
|
// Should never happen
|
|
System.out.println("Error: ClassLoader.registerAsParallelCapable() did not return a boolean!");
|
|
System.exit(1);
|
|
}
|
|
} catch (NoSuchMethodException nsme) {
|
|
System.out.println("No ClassLoader.registerAsParallelCapable() API");
|
|
} catch (NoSuchMethodError nsme2) {
|
|
System.out.println("No ClassLoader.registerAsParallelCapable() API");
|
|
} catch (Exception ex) {
|
|
ex.printStackTrace();
|
|
// Exit immediately to indicate an error
|
|
System.exit(1);
|
|
}
|
|
System.out.println("Parallel ClassLoader registration: " +
|
|
supportParallel);
|
|
}
|
|
|
|
public DelegatingLoader(URL urls[]) {
|
|
super(urls);
|
|
System.out.println("DelegatingLoader using URL " + urls[0]);
|
|
}
|
|
|
|
public void setDelegate(String[] delClasses, DelegatingLoader delLoader) {
|
|
this.delClasses = delClasses;
|
|
this.delLoader = delLoader;
|
|
}
|
|
|
|
public Class loadClass(String className, boolean resolve)
|
|
throws ClassNotFoundException {
|
|
for (int i = 0; i < delClasses.length; i++) {
|
|
if (delClasses[i].equals(className)) {
|
|
DelegateTest.log("Delegating class loading for " + className);
|
|
try {
|
|
Thread.sleep(500);
|
|
} catch (InterruptedException ie) {
|
|
return null;
|
|
}
|
|
return delLoader.loadClass(className, resolve);
|
|
}
|
|
}
|
|
|
|
DelegateTest.log("Loading local class " + className);
|
|
// synchronized (getClassLoadingLock(className)) {
|
|
return super.loadClass(className, resolve);
|
|
// }
|
|
}
|
|
}
|