[jboss-user] [EJB 3.0] - Why this:

[dbettoni]

look at this code:

	@Stateless
  | 	@Remote
  | 	public class SMSBAccountManager implements AccountManager {
  | 	
  | 		@PersistenceContext //(unitName="smsboss_core")
  | 		protected EntityManager em;
  | 	
  | 		...
  | 		...
  | 		
  | 		public Set<Account> getAccounts( int providerId ) {
  | 			Provider p = em.find( Provider.class, providerId );
  | 			Set<Account> set = p.getAccounts();
  | 			for( Account a : set ){
  | 				System.out.println("@@@@ s="+a);
  | 			}
  | 			return p.getAccounts();
  | 		}
  | 	}
  | 
  | 
when I run my remote junit test and I scan the Set returned by the method getAccounts(...)  
I haven't any problems  
but if I drop the useless code:  

	public Set<Account> getAccounts( int providerId ) {
  | 		Provider p = em.find( Provider.class, providerId );
  | 		//Set<Account> set = p.getAccounts();
  | 		//for( Account a : set ){
  | 		//	System.out.println("@@@@ s="+a);
  | 		//}
  | 		return p.getAccounts();
  | 	}
  | 
my test fail with exception:  

    [junit] Testsuite: it.menhir.j2ee.smsboss.ejb3.core.TestSuite
    [junit] Tests run: 3, Failures: 0, Errors: 1, Time elapsed: 3,054 sec
    [junit] ------------- Standard Error -----------------
    [junit] 22-set-2006 15.56.46 org.hibernate.LazyInitializationException 
    [junit] GRAVE: failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
    [junit] org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
    [junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
    [junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
    [junit] at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
    [junit] at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
    [junit] at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:138)
    [junit] at it.menhir.j2ee.smsboss.ejb3.core.AccountWithMessageTest.addMessages(AccountWithMessageTest.java:55)
    [junit] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [junit] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    [junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    [junit] at java.lang.reflect.Method.invoke(Method.java:585)
    [junit] at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
    [junit] at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
    [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    [junit] at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
    [junit] at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
    [junit] at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
    [junit] at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
    [junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
    [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    [junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
    [junit] at org.junit.internal.runners.CompositeRunner.run(CompositeRunner.java:29)
    [junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
    [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    [junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
    [junit] at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:32)
    [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
    [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
    [junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
    [junit] ------------- ---------------- ---------------
    [junit] Testcase: addMessages(it.menhir.j2ee.smsboss.ejb3.core.AccountWithMessageTest):	Caused an ERROR
    [junit] failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
    [junit] org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: it.menhir.j2ee.smsboss.ejb3.core.entity.Provider.accounts, no session or session was closed
    [junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
    [junit] at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
    [junit] at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
    [junit] at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
    [junit] at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:138)
    [junit] at it.menhir.j2ee.smsboss.ejb3.core.AccountWithMessageTest.addMessages(AccountWithMessageTest.java:55)
    [junit] at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
    [junit] at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
    [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    [junit] at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
    [junit] at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
    [junit] at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
    [junit] at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
    [junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
    [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    [junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
    [junit] at org.junit.internal.runners.CompositeRunner.run(CompositeRunner.java:29)
    [junit] at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
    [junit] at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
    [junit] at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
    [junit] at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:32)


does someone know to make sense to this behavior?  
  







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