org.wildfly.common.ref.StrongReference Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 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;
/**
* A strong reference with an attachment. Since strong references are always reachable, a reaper may not be used.
*
* @param the reference value type
* @param the attachment type
*
* @author David M. Lloyd
*/
public class StrongReference implements Reference {
private volatile T referent;
private final A attachment;
/**
* Construct a new instance.
*
* @param referent the referent
* @param attachment the attachment
*/
public StrongReference(final T referent, final A attachment) {
this.referent = referent;
this.attachment = attachment;
}
/**
* Construct a new instance.
*
* @param referent the referent
*/
public StrongReference(final T referent) {
this(referent, null);
}
public T get() {
return referent;
}
public void clear() {
referent = null;
}
public A getAttachment() {
return attachment;
}
public Type getType() {
return Type.STRONG;
}
public String toString() {
return "strong reference to " + String.valueOf(get());
}
}