foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/performance/writing/UnitOfWorkNoChangesClientSessionEmployeeTest.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.writing;

import org.eclipse.persistence.expressions.*;
import org.eclipse.persistence.sessions.*;
import org.eclipse.persistence.testing.tests.performance.PerformanceTest;
import org.eclipse.persistence.sessions.server.*;
import org.eclipse.persistence.testing.models.performance.toplink.*;

/**
 * This tests the performance of unit of work with no changes.
 * It uses a client session to also test client session creation.
 * Its purpose is to compare the test result with previous release/label results.
 * It also provides a useful test for profiling performance.
 */
public class UnitOfWorkNoChangesClientSessionEmployeeTest extends PerformanceTest {
    protected Server server;
    protected Employee employee;

    public UnitOfWorkNoChangesClientSessionEmployeeTest() {
        setDescription("This tests the performance of unit of work with no changes.");
    }

    /**
     * Find any employee.
     */
    @Override
    public void setup() {
        server = getSession().getProject().createServerSession();
        server.login();
        Expression expression = new ExpressionBuilder().get("firstName").equal("Bob");
        employee = (Employee)getSession().readObject(Employee.class, expression);
    }

    /**
     * Read employee and clear the cache, test database read.
     */
    @Override
    public void test() throws Exception {
        Session client = server.acquireClientSession();
        UnitOfWork uow = client.acquireUnitOfWork();
        Employee employee = (Employee)uow.readObject(this.employee);
        uow.commit();
        client.release();
    }

    @Override
    public void reset() {
        server.logout();
    }
}