| /* |
| * Copyright (c) 2018, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| package org.eclipse.persistence.internal.identitymaps; |
| |
| import java.lang.ref.ReferenceQueue; |
| import java.lang.ref.WeakReference; |
| |
| public class QueueableWeakCacheKey extends WeakCacheKey { |
| // This the reference queue from the owning map that |
| // the weak references will be registered to. |
| // makes for easy cleanup |
| protected ReferenceQueue referenceQueue; |
| |
| public QueueableWeakCacheKey(Object primaryKey, Object object, Object writeLockValue, long readTime, ReferenceQueue refQueue, boolean isIsolated) { |
| super(primaryKey, object, writeLockValue, readTime, isIsolated); |
| this.referenceQueue = refQueue; |
| } |
| |
| @Override |
| public void setObject(Object object) { |
| this.reference = new CacheKeyReference(object, referenceQueue, this); |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void acquire() { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void acquire(boolean forMerge) { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public boolean acquireNoWait() { |
| return true; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public boolean acquireNoWait(boolean forMerge) { |
| return true; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void acquireDeferredLock() { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void checkReadLock() { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void acquireReadLock() { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public boolean acquireReadLockNoWait() { |
| return true; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public boolean isAcquired() { |
| return false; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void release() { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void releaseDeferredLock() { |
| return; |
| } |
| |
| /** |
| * Avoid acquiring locks for unit of work. |
| */ |
| @Override |
| public void releaseReadLock() { |
| return; |
| } |
| |
| static class CacheKeyReference extends WeakReference{ |
| protected QueueableWeakCacheKey owner; |
| public CacheKeyReference(Object object, ReferenceQueue referenceQueue, QueueableWeakCacheKey owner){ |
| super(object, referenceQueue); |
| this.owner = owner; |
| } |
| |
| public QueueableWeakCacheKey getOwner(){ |
| return owner; |
| } |
| } |
| } |