org.wildfly.common.ref.CleanerReference Maven / Gradle / Ivy
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* Copyright 2015 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.common.ref;
import java.util.Collections;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* A special version of {@link PhantomReference} that is strongly retained until it is reaped by the collection thread.
*
* @author David M. Lloyd
*/
public class CleanerReference extends PhantomReference {
private static final Set> set = Collections.newSetFromMap(new ConcurrentHashMap, Boolean>());
/**
* Construct a new instance with a reaper.
*
* @param referent the referent
* @param attachment the attachment
* @param reaper the reaper to use
*/
public CleanerReference(final T referent, final A attachment, final Reaper reaper) {
super(referent, attachment, reaper);
set.add(this);
}
void clean() {
set.remove(this);
}
public final int hashCode() {
return super.hashCode();
}
public final boolean equals(final Object obj) {
return super.equals(obj);
}
}