foundation/eclipselink.core.test/src/it/java/org/eclipse/persistence/testing/tests/distributedservers/DistributedSystem.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.distributedservers;

import org.eclipse.persistence.internal.sessions.DatabaseSessionImpl;
import org.eclipse.persistence.sessions.DatabaseSession;
import org.eclipse.persistence.sessions.UnitOfWork;
import org.eclipse.persistence.testing.framework.TestSystem;
import org.eclipse.persistence.tools.schemaframework.SchemaManager;


/**
 *    <b>Purpose</b>: To define system behavior.
 *    <p><b>Responsibilities</b>:    <ul>
 *    <li> Login and return an initialize database session.
 *    <li> Create and populate the database.
 *    </ul>
 */
public class

DistributedSystem extends TestSystem {
    /**
     * Use the default EmployeeProject.
     */
    public

    DistributedSystem() {
        project = new DistributedProject();
    }

    @Override
    public void addDescriptors(DatabaseSession session) {
        session.logMessage("Project is from generated code");
        (session).addDescriptors(project);
    }

    @Override
    public void createTables(DatabaseSession session) {
        SchemaManager schemaManager = new SchemaManager(session);

        // Start Build fieldTypes
        schemaManager.buildFieldTypes(Dist_Employee.tableDefinition());
        schemaManager.buildFieldTypes(Company.tableDefinition());
        schemaManager.buildFieldTypes(Item.tableDefinition());
        // end build fieldTypes

        //start drop constraints
        try {
            schemaManager.dropConstraints(Dist_Employee.tableDefinition());
            schemaManager.dropConstraints(Company.tableDefinition());
            schemaManager.dropConstraints(Item.tableDefinition());
        } catch (org.eclipse.persistence.exceptions.DatabaseException dbE) {
            //ignore
        }
        //end drop constraints

        //start replace tables
        schemaManager.replaceObject(Dist_Employee.tableDefinition());
        schemaManager.replaceObject(Company.tableDefinition());
        schemaManager.replaceObject(Item.tableDefinition());

        //end replace tables

        //start create constraints
        schemaManager.createConstraints(Dist_Employee.tableDefinition());
        schemaManager.createConstraints(Company.tableDefinition());
        schemaManager.createConstraints(Item.tableDefinition());
        //end create constraints

        schemaManager.createSequences();
    }

    /**
     * Return a connected session using the default login.
     */
    @Override
    public DatabaseSession login() {
        DatabaseSession session;

        session = new DatabaseSessionImpl(project);
        session.login();

        return session;
    }

    /**
     *    This method will instantiate all of the example instances and insert them into the database
     *    using the given session.
     */
    @Override
    public void populate(DatabaseSession session) {
        UnitOfWork unitOfWork = session.acquireUnitOfWork();

        unitOfWork.registerObject(Dist_Employee.example1());
        unitOfWork.registerObject(Company.example1());
        unitOfWork.commit();
    }
}