| /* |
| * 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.queries.optimization; |
| |
| import org.eclipse.persistence.annotations.BatchFetchType; |
| import org.eclipse.persistence.expressions.*; |
| import org.eclipse.persistence.queries.*; |
| import org.eclipse.persistence.mappings.*; |
| import org.eclipse.persistence.testing.framework.*; |
| import org.eclipse.persistence.testing.models.collections.*; |
| |
| public class BatchReadingBatchReadExpressionTest extends TestCase { |
| public ReadAllQuery query; |
| BatchFetchType batchType; |
| |
| /** |
| * BatchReadingBatchReadExpressionTest was added for CR#3238. |
| * It tests for a memory leak with Batch Read Expressions. |
| * In a query with a batch read attribute expression, each time it |
| * was executed, its vector containing the expression would grow. |
| * It was fixed to that it would always have the correct number of |
| * expression. |
| * Creation date: (6/9/00 9:48:06 AM) |
| * @author Tom Ware |
| */ |
| public BatchReadingBatchReadExpressionTest(BatchFetchType batchType) { |
| this.batchType = batchType; |
| setName(getName() + batchType); |
| } |
| |
| @Override |
| public void reset() { |
| getSession().getIdentityMapAccessor().initializeIdentityMaps(); |
| } |
| |
| @Override |
| public void test() { |
| query = new ReadAllQuery(); |
| query.setReferenceClass(Restaurant.class); |
| query.setBatchFetchType(batchType); |
| ExpressionBuilder restaurant = new ExpressionBuilder(); |
| // The test is designed for a problem in which the batchExpression traverses |
| // more than one mapping as below. |
| Expression batchExpression = restaurant.get("menus").get("owner"); |
| query.addBatchReadAttribute(batchExpression); |
| // Execute the query with a batch read attribute several times |
| for (int i = 0; i < 3; i++) { |
| getSession().executeQuery(query); |
| getSession().getIdentityMapAccessor().initializeIdentityMaps(); |
| } |
| |
| } |
| |
| @Override |
| public void verify() { |
| // The batchReadAttributeExpressions vector should only ever by one since we only add one expression in the execute() method of this test. |
| ForeignReferenceMapping batchMapping = |
| (ForeignReferenceMapping)getSession().getDescriptor(Restaurant.class).getMappingForAttributeName("menus"); |
| ReadAllQuery selectionQuery = (ReadAllQuery)batchMapping.getSelectionQuery(); |
| if (selectionQuery.getBatchReadAttributeExpressions().size() > 1) { |
| throw new TestErrorException("Batch read attribute expressions are leaking memory by increasing the size of the batch read expressions vector each time the query is executed."); |
| } |
| } |
| } |