foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/performance/reading/ReadAllvsConformTest.java

/*
 * 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.performance.reading;

import java.util.*;
import org.eclipse.persistence.queries.*;
import org.eclipse.persistence.sessions.*;
import org.eclipse.persistence.expressions.*;
import org.eclipse.persistence.testing.models.performance.toplink.*;
import org.eclipse.persistence.testing.framework.*;

/**
 * This test compares the performance of read all in unit of work vs conform read all.
 */
public class ReadAllvsConformTest extends PerformanceComparisonTestCase {
    protected UnitOfWork uow;

    public ReadAllvsConformTest() {
        setDescription("This test compares the performance of read all in unit of work vs conform read all.");
        addReadAllConformTest();
    }

    /**
     * Create a unit of work with changes.
     */
    @Override
    public void setup() {
        uow = getSession().acquireUnitOfWork();
        List employees = uow.readAllObjects(Employee.class);
        uow.deleteObject(employees.get(5));
        uow.registerNewObject(new Employee());
        Employee changedEmployee = (Employee)employees.get(10);
        changedEmployee.setSalary(0);
    }

    /**
     * Read all employees with salary {@literal >} 0.
     */
    @Override
    public void test() throws Exception {
        ReadAllQuery query = new ReadAllQuery(Employee.class);
        ExpressionBuilder builder = new ExpressionBuilder();
        query.setSelectionCriteria(builder.get("salary").greaterThan(0));
        List results = (List)uow.executeQuery(query);
    }

    /**
     * Read all employees in-memory.
     */
    public void addReadAllConformTest() {
        PerformanceComparisonTestCase test = new PerformanceComparisonTestCase() {
            @Override
            public void test() {
                ReadAllQuery query = new ReadAllQuery(Employee.class);
                ExpressionBuilder builder = new ExpressionBuilder();
                query.setSelectionCriteria(builder.get("salary").greaterThan(0));
                query.conformResultsInUnitOfWork();
                List results = (List)uow.executeQuery(query);
            }
        };
        test.setName("ReadAllConformTest");
        test.setAllowableDecrease(-120);
        addTest(test);
    }
}