I am using embedded glassfish (3.1.2.2) with junit (4.11), with JDK 1.7, though my source and target is set to 1.6 (maven-compiler-plugin configuration).
Following is my code:
Person.java
@Entity
public class Person implements Serializable {
private static final long serialVersionUID = 81398385247591972L;
@Id
@GeneratedValue
private Long id;
@Version
private Long version;
@Column(length = 15, nullable = false, unique = true, updatable = false)
private String username;
@Column(length = 50)
private String status;
// Constructors
// getters/setters
// hashCode, equals, toString
}
Service.java
@Stateless
public class Service {
@PersistenceContext(unitName = "ExamplePU", type = PersistenceContextType.TRANSACTION)
private EntityManager em;
public Person add(Person person) {
em.persist(person);
return person;
}
public Person find(Long id) {
return em.find(Person.class, id);
}
public Person modify(Person person) {
return em.merge(person);
}
// some more code ...
}
ServiceTest.java
public class ServiceTest {
private static EJBContainer ejbContainer;
private static Service service;
// @BeforeClass, @AfterClass, @Before, @After
@Test
public void testMerge() {
Person person;
/* Step 1 */person = service.add(new Person("username", "status"));
print("Added : " + person);
person.setStatus("Away");
/* Step 2 */person = service.modify(person);
print("Merged (status change) : " + person);
person.setUsername("UsErNaMe");
/* Step 3 */person = service.modify(person);
print("Merged (username change) : " + person);
}
// Some more tests
}
Step 1 generates following SQL (as expected):
INSERT INTO PERSON (ID, STATUS, USERNAME, VERSION) VALUES (?, ?, ?, ?)
bind => [1, status, username, 1]
Step 2 generates following SQL (as expected):
UPDATE PERSON SET STATUS = ?, VERSION = ? WHERE ((ID = ?) AND (VERSION = ?))
bind => [Away, 2, 1, 1]
Step 3 does not generate any SQL, but it does not throw any exception, which I am expecting, as the 'username' is annotated as @Column(..., updatable = false). The print(...) method prints following output:
Merged (username change) : Person [id=1, version=2, username=UsErNaMe, status=Away]
This time the merge() operation has updated username, but not version. Also, now the database is out-of-sync with EntityManager cache.
Is this expected, or bug in EclipseLink?
UPDATE
Expected result is exception at Step 3 above.
UPDATE
Have filed bug here.
