[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - Calling One Session From Another And Getting LazyInitializat
I am passing an entity with a lazy loaded property from one session bean to another
sessionbean and getting a LazyInitializationException. It's still inside of jboss so I
don't understand why it can't load it. Is this expected behavior? If so, what is
the correct way to do it. Heres a simple example of what I am talking about.
@Entity
@Table(name = "LazyChild")
public class LazyChild implements java.io.Serializable {
private Integer key;
private String name;
@Id @GeneratedValue
@Column(name="LazyChildKey")
public Integer getKey() { return key; }
public void setKey(Integer key) { this.key = key; }
public String getName() { return name; }
public void setName(String s) { name = s; }
}
@Entity
@Table(name = "Test")
public class TestEntity implements java.io.Serializable {
private Integer key;
private LazyChild lazyChild;
@Id @GeneratedValue
@Column(name="TestKey")
public Integer getKey() { return key; }
public void setKey(Integer key) { this.key = key; }
@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "LazyChildKey")
public LazyChild getLazyChild() { return lazyChild; }
public void setLazyChild(LazyChild l) { lazyChild = l; }
}
@Stateless
@RemoteBinding (jndiBinding="TestSessionHelper")
@Remote(TestSessionHelper.class)
public class TestSessionHelperBean {
@PersistenceContext
protected EntityManager em;
public void useLazyChild(TestEntity entity) {
entity.getLazyChild().getName();
}
}
@Stateless
@RemoteBinding (jndiBinding="TestSession")
@Remote(TestSession.class)
public class TestSessionBean {
@PersistenceContext
protected EntityManager em;
@EJB TestSessionHelper m_sessionHelper;
public void doIt() {
TestEntity entity = em.find(TestEntity.class, 1);
m_sessionHelper.useLazyChild(entity);
}
}
public class ClientSideTest {
public static void main(String[] args) throws Exception {
InitialContext ctx = new InitialContext();
TestSession session = (TestSession)ctx.lookup("TestSession");
session.doIt();
}
}
When I deploy these session beans and run ClientSideTest.main I get the following
exception on the server side.
15:28:52,109 ERROR [LazyInitializationException] could not initialize proxy - no
Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Sessi
on
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyIn
itializer.java:57)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(Abstrac
tLazyInitializer.java:111)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.intercept(CGLIBLa
zyInitializer.java:160)
at alliancetechnical.ejb3.session.LazyChild$$EnhancerByCGLIB$$6f310ca4.g
etName()
at alliancetechnical.ejb3.session.TestSessionHelperBean.useLazyChild(Tes
tSessionHelperBean.java:14)
...
at $Proxy670.useLazyChild(Unknown Source)
at alliancetechnical.ejb3.session.TestSessionBean.doIt(TestSessionBean.j
ava:19)
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