CGLIB exception

archimedes1967 · **Joined:** Wed Apr 27, 2005 11:04 am **Posts:** 2

Scenario: I have a jUnit test driver that with a setUp(), tearDown(), and a test method.

setUp() constructs an object, inserts it into the database, and keeps a reference for later destruction.

tearDown() destroys the object in the database and releases the instance.

the test method then invokes a business method that will eventually lead to a Query.uniqueResult() being invoked. This works great. The issue is when, in the jUnit test method, an assertEquals() is done on the stored reference and the new reference. CGLIB doesn't appear to like that.

Hibernate version:
3.0.1

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Code:

    try {
      session = HibernateUtilities.getSession();
      Query q = session.createQuery(USER_QUERY);
      q.setString(0, userid);
      rvalue = (User) q.uniqueResult();
    }
    catch (final HibernateException he) {
      LOGGER.warn("Problem executing logon query.", he);
      rvalue = null;
    }
    finally {
      if (session != null) {
   session.close();
      }
    }

Full stack trace of any exception that occurs:

Code:

 <error message="could not initialize proxy - the owning Session was closed" 
type="org.hibernate.LazyInitializationException">
org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:53)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:80)
at org.hibernate.proxy.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:134)
at (company pkg name).model.Contact$$EnhancerByCGLIB$$5d913e36.equals(&lt;generated&gt;)
at (company package name).model.User.equals(User.java:109)
at (company package name).model.TestUser.testLogon(TestUser.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
</error>

Name and version of the database you are using:
MySQL 4.0.1

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:
[/code]

baliukas · **Posted:** Wed Apr 27, 2005 3:12 pm

Run test in single session, open it in setUp() and close in tearDown(). You can use instance variable to store session for test if it runs in single thread.

archimedes1967 · **Joined:** Wed Apr 27, 2005 11:04 am **Posts:** 2

...when I start construction of the web application, where I definitely will not be in single session mode? This is telling me that Object.equals() will not work on objects generated by Query or SQLQuery within Hibernate.

pksiv · **Posted:** Wed Apr 27, 2005 5:12 pm

archimedes1967 wrote:

...when I start construction of the web application, where I definitely will not be in single session mode? This is telling me that Object.equals() will not work on objects generated by Query or SQLQuery within Hibernate.

Object.equals() will work as long as all of the properties being access in the equals() method have been loaded.

All of the properties that make up a true business equal() condition should be aggressively loaded.

baliukas · **Posted:** Thu Apr 28, 2005 8:36 am

archimedes1967 wrote:

...when I start construction of the web application, where I definitely will not be in single session mode? This is telling me that Object.equals() will not work on objects generated by Query or SQLQuery within Hibernate.

Yes, you will need to store session in threadlocal. I recomment not to store persistent data in httpsession or in servlet context, it will help to avoid many problems(store ID only and use global cache to optimize read operations).