org.jboss.weld.resources.HotspotReflectionCache Maven / Gradle / Ivy
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* Copyright 2012, Red Hat, Inc., and individual contributors
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*
* Licensed 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 "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.weld.resources;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import org.jboss.weld.exceptions.WeldException;
import org.jboss.weld.metadata.TypeStore;
/**
* {@link ReflectionCache} implementation that works around possible deadlocks in HotSpot:
*
* @see https://issues.jboss.org/browse/WELD-1169
* @see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7122142
* @see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6588239
*
* @author Jozef Hartinger
*
*/
public class HotspotReflectionCache extends DefaultReflectionCache {
private final Class annotationTypeLock;
public HotspotReflectionCache(TypeStore store) {
super(store);
try {
this.annotationTypeLock = Class.forName("sun.reflect.annotation.AnnotationType");
} catch (ClassNotFoundException e) {
throw new WeldException(e);
}
}
@Override
protected Annotation[] internalGetAnnotations(AnnotatedElement element) {
if (element instanceof Class) {
Class clazz = (Class) element;
if (clazz.isAnnotation()) {
synchronized (annotationTypeLock) {
return element.getAnnotations();
}
}
}
return element.getAnnotations();
}
}