package com.avaje.tests.basic;
import org.junit.Assert;
import org.junit.Test;
import com.avaje.ebean.BaseTestCase;
import com.avaje.ebean.Ebean;
import com.avaje.tests.model.basic.Customer;
import com.avaje.tests.model.basic.Order;
import com.avaje.tests.model.basic.ResetBasicData;
public class TestPersistenceContext extends BaseTestCase {
@Test
public void test() {
ResetBasicData.reset();
// implicit transaction with its own
// persistence context
Order oBefore = Ebean.find(Order.class, 1);
Order order = null;
// start a persistence context
Ebean.beginTransaction();
try {
order = Ebean.find(Order.class, 1);
// not the same instance ...as a different
// persistence context
Assert.assertTrue(order != oBefore);
// finds an existing bean in the persistence context
// ... so doesn't even execute a query
Order o2 = Ebean.find(Order.class, 1);
Order o3 = Ebean.getReference(Order.class, 1);
// all the same instance
Assert.assertTrue(order == o2);
Assert.assertTrue(order == o3);
} finally {
Ebean.endTransaction();
}
// implicit transaction with its own
// persistence context
Order oAfter = Ebean.find(Order.class, 1);
Assert.assertTrue(oAfter != oBefore);
Assert.assertTrue(oAfter != order);
Order testOrder = ResetBasicData.createOrderCustAndOrder("testPC");
Integer id = testOrder.getCustomer().getId();
Integer orderId = testOrder.getId();
// start a persistence context
Ebean.beginTransaction();
try {
Customer customer = Ebean.find(Customer.class)
.setUseCache(false)
.setId(id)
.findUnique();
System.gc();
Order order2 = Ebean.find(Order.class, orderId);
Customer customer2 = order2.getCustomer();
Assert.assertEquals(customer.getId(),customer2.getId());
Assert.assertTrue(customer == customer2);
} finally {
Ebean.endTransaction();
}
}
}