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I have a question on the issue of a generic DAO, being used in a test project with Vraptor.
This dao, works normal in my requests, more when being used in a unit test the same as the following problem when trying to remove:
@Before
public void init(){
EntityManagerFactory factory = Persistence.createEntityManagerFactory("TEST");
EntityManager manager = factory.createEntityManager();
this.dao = new DaoMaster(manager);
}
@Test
public void refusePersistDuplicateDomain(){
Company c1 = new Company("Name", "teste");
Company c2 = new Company("Name", "teste");
Assert.assertTrue(this.dao.persist(c1));
Assert.assertFalse(this.dao.persist(c2));
this.dao.remove(c1.getId(), Company.class);
}
It generates the following error when removing the object.
java.lang.IllegalArgumentException: attempt to create delete event with null entity
at org.hibernate.event.spi.DeleteEvent.<init>(DeleteEvent.java:48)
at org.hibernate.internal.SessionImpl.delete(SessionImpl.java:896)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.remove(AbstractEntityManagerImpl.java:1214)
at br.com.adapcon.jpro.dao.DaoMaster.remove(DaoMaster.java:96)
at br.com.adapcon.jpro.test.dao.CompanyDaoTest.refusePersistDuplicateDomain(CompanyDaoTest.java:65)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.ExpectException.evaluate(ExpectException.java:19)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
These are the two methods used.
public boolean persist(IEntity o){
try{
this.charger();
if (o.getId() != null && o.getId() > 0) {
manager.merge(o);
} else {
manager.persist(o);
}
manager.getTransaction().commit();
return true;
}catch(Exception e){
return false;
}
}
public boolean remove(Long id, Class<?> objectClass){
try{
this.charger();
Object o = findById(id, objectClass);
System.out.println("M: "+id);
manager.remove(o);
manager.getTransaction().commit();
return true;
}catch (Exception e) {
e.printStackTrace();
return false;
}
}
private void charger(){
if(!manager.getTransaction().isActive()){
manager.getTransaction().begin();
}
}
Doesn’t answer the question, but take a look here.
– Renan Gomes