| /* |
| * Copyright (c) 1998, 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 |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.internal.identitymaps; |
| |
| import org.eclipse.persistence.descriptors.ClassDescriptor; |
| import org.eclipse.persistence.internal.sessions.AbstractSession; |
| |
| /** |
| * <p><b>Purpose</b>: A SoftIdentityMap holds all objects referenced by the application. |
| * The soft identity map is similar to the weak identity map except for the fact that it allows |
| * only garbage collects when memory is low. |
| * <p><b>Responsibilities</b>:<ul> |
| * <li> Guarantees identity. |
| * <li> Allows garbage collection when memory is low. |
| * </ul> |
| * @author James Sutherland |
| * @since TopLink 11g |
| */ |
| public class SoftIdentityMap extends WeakIdentityMap { |
| |
| public SoftIdentityMap(int size, ClassDescriptor descriptor, AbstractSession session, boolean isIsolated) { |
| super(size, descriptor, session, isIsolated); |
| this.cleanupCount = 0; |
| this.cleanupSize = size; |
| } |
| |
| @Override |
| public CacheKey createCacheKey(Object primaryKey, Object object, Object writeLockValue, long readTime) { |
| return new SoftCacheKey(primaryKey, object, writeLockValue, readTime, isIsolated); |
| } |
| } |
