org.apache.meecrowave.internal.ClassLoaderLock Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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*/
package org.apache.meecrowave.internal;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.webbeans.config.WebBeansContext;
import org.apache.webbeans.config.WebBeansFinder;
import org.apache.webbeans.corespi.DefaultSingletonService;
import org.apache.webbeans.spi.SingletonService;
public final class ClassLoaderLock {
public static final Lock LOCK = new ReentrantLock();
public static ClassLoader getUsableContainerLoader() {
ClassLoader currentCL = Thread.currentThread().getContextClassLoader();
if (currentCL == null) {
currentCL = ClassLoaderLock.class.getClassLoader();
}
if (Boolean.getBoolean("meecrowave.junit.classloaderlock.off")) { // safeguard for advanced cases
return currentCL;
}
final SingletonService singletonService = WebBeansFinder.getSingletonService();
synchronized (singletonService) {
try {
if (singletonService instanceof DefaultSingletonService) {
synchronized (singletonService) {
((DefaultSingletonService) singletonService).register(currentCL, null);
// all fine, it seems we do not have an OWB container for this ClassLoader yet
// let's reset it then ;
singletonService.clear(currentCL);
}
return currentCL;
}
}
catch (IllegalArgumentException iae) {
// whoops there is already an OWB container registered for this very ClassLoader
}
return new ClassLoader(currentCL) {};
}
}
private ClassLoaderLock() {
// no-op
}
}