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/*
* Copyright (c) 2017, 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:
// 12/14/2017-3.0 Tomas Kraus
// - 522635: ConcurrentModificationException when triggering lazy load from conforming query
package org.eclipse.persistence.testing.tests.identitymaps;
import java.util.Vector;
import org.eclipse.persistence.expressions.ExpressionBuilder;
import org.eclipse.persistence.queries.InMemoryQueryIndirectionPolicy;
import org.eclipse.persistence.queries.ReadAllQuery;
import org.eclipse.persistence.sessions.UnitOfWork;
import org.eclipse.persistence.testing.framework.TestCase;
import org.eclipse.persistence.testing.models.employee.domain.Employee;
/**
* Bug# 522635 - Verify that {@code ConcurrentModificationException} is not thrown from {@code IdentityMapManager}
* when {@code getAllFromIdentityMap} method is being called twice.
*/
public class GetAllFromIdentityMapTest extends TestCase {
/** Current transaction. */
private UnitOfWork uow = null;
/** Query instance. */
private ReadAllQuery query;
/**
* Create an instance of {@link ReadAllQuery} and initialize it.
*
* @param c entity class
* @return new instance of initialized {@link ReadAllQuery}
*/
private static ReadAllQuery newReadAllQuery(Class<?> c) {
final ReadAllQuery query = new ReadAllQuery(c);
query.conformResultsInUnitOfWork();
query.setInMemoryQueryIndirectionPolicy(new InMemoryQueryIndirectionPolicy(InMemoryQueryIndirectionPolicy.SHOULD_TRIGGER_INDIRECTION));
return query;
}
/**
* Test setup.
* Open transaction, initialize query and initialize cache with 1st query execution.
*/
@Override
public void setup() {
getSession().getIdentityMapAccessor().initializeAllIdentityMaps();
uow = getSession().acquireUnitOfWork();
query = newReadAllQuery(Employee.class);
ExpressionBuilder emp = new ExpressionBuilder();
query.setSelectionCriteria(emp.get("manager").get("firstName").equal("Bob"));
uow.executeQuery(query);
}
/**
* Test cleanup.
* Release transaction and reset cache.
*/
@Override
public void reset() {
uow.release();
uow = null;
getSession().getIdentityMapAccessor().initializeAllIdentityMaps();
}
/**
* Test case.
* Verify that {@code ConcurrentModificationException} is not thrown from {@code IdentityMapManager}
* during 2nd query execution when objects are already in the cache.
*/
@Override
public void test() throws Throwable {
Vector<Employee> employees = (Vector<Employee>)uow.executeQuery(query);
assertFalse(employees.isEmpty());
for (Employee employee : employees) {
assertEquals("Bob", employee.getManager().getFirstName());
}
}
}