| /* |
| * Copyright (c) 1998, 2021 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.testing.tests.identitymaps; |
| |
| import java.util.*; |
| import org.eclipse.persistence.internal.identitymaps.*; |
| import org.eclipse.persistence.testing.models.employee.domain.*; |
| import org.eclipse.persistence.testing.framework.*; |
| |
| /** |
| * Read objects into the cache, force garbage collection, see that the cache is empty. |
| */ |
| public class ReadWeakIdentityMapTest extends TestCase { |
| protected Class identityMapClass; |
| protected Class originalIdentityMapClass; |
| protected int originalIdentityMapSize; |
| protected int querySize; |
| |
| public ReadWeakIdentityMapTest(Class mapClass) { |
| identityMapClass = mapClass; |
| } |
| |
| /** |
| * Return the identity map for the class Employee. |
| */ |
| protected WeakIdentityMap getIdentityMap() { |
| return (WeakIdentityMap)getAbstractSession().getIdentityMapAccessorInstance().getIdentityMap(Employee.class); |
| } |
| |
| @Override |
| public void reset() { |
| getSession().getDescriptor(Employee.class).setIdentityMapClass(originalIdentityMapClass); |
| getSession().getDescriptor(Employee.class).setIdentityMapSize(originalIdentityMapSize); |
| getSession().getIdentityMapAccessor().initializeIdentityMaps(); |
| } |
| |
| @Override |
| public void setup() { |
| originalIdentityMapClass = getSession().getDescriptor(Employee.class).getIdentityMapClass(); |
| originalIdentityMapSize = getSession().getDescriptor(Employee.class).getIdentityMapSize(); |
| getSession().getDescriptor(Employee.class).setIdentityMapClass(identityMapClass); |
| getSession().getDescriptor(Employee.class).setIdentityMapSize(10); |
| getSession().getIdentityMapAccessor().initializeIdentityMaps(); |
| |
| Vector objects = getSession().readAllObjects(Employee.class); |
| querySize = objects.size(); |
| getSession().logMessage("Read " + objects.size() + " objects."); |
| getSession().logMessage(getIdentityMap().getSize() + " are left in the cache."); |
| } |
| |
| @Override |
| public void test() { |
| if (getIdentityMap().getSize() == 0) { |
| throw new TestWarningException("We did not fill the cache, the test is invalid."); |
| } |
| int numObjects = 0; |
| for (int loops = 0; loops < 10; loops++) { |
| // The jdk1.2.0 on the Testing machine treats the weak reference as a softweak reference so we must waste memory |
| Vector vector = new Vector(50000); |
| for (int i = 0; i < 50000; i++) { |
| vector.addElement(new java.math.BigDecimal(i)); |
| } |
| |
| // Force garbage collection, which should clear the cache. |
| System.gc(); |
| System.runFinalization(); |
| |
| // Ensure that some ref have garbage collected, |
| // if not all through warning as different VM have different gc behavior. |
| Map cache = getIdentityMap().getCacheKeys(); |
| numObjects = 0; |
| for (Iterator iterator = cache.values().iterator(); iterator.hasNext();) { |
| CacheKey key = (CacheKey)iterator.next(); |
| if (key.getObject() != null) { |
| numObjects++; |
| } |
| } |
| if (numObjects == 0) { |
| break; |
| } |
| } |
| if (numObjects == querySize) { |
| throw new TestErrorException("The WeakIdentityMap did not allow any garbage collection."); |
| } else if (numObjects > (querySize / 2)) { |
| throw new TestWarningException("The WeakIdentityMap did not garbage collect half of the objects. This may be because of VM differences."); |
| } else if (numObjects > 0) { |
| throw new TestWarningException("The WeakIdentityMap did not garbage collect all of the objects. This may be because of VM differences."); |
| } |
| } |
| } |