Class level resource recollection

Question

Hi
Please tell me how to handle finalize at class level?
ie when class is about to be unloaded resources should be freed.
when class is about to be unloaded resources should be freed.
There can be many ways when they resources not freed.( Class A loaded by some loader, A loaded all Hibernate session in Class Global(:)), session reference used by other classes, when A finishes session will still be thr in Global. Correct me if i am wrong.)
How can a class say Good Bye message at 'END'?
Thanks & #
Amit

Answer 1

Is it because of this :
<font size="2">16.7.1.2 Programming Interfaces for Resource Manager Connection Factory ReferencesThe Bean Provider must use resource manager connection factory references to obtain connections to
resources as follows.
• Assign an entry in the enterprise bean’s environment to the resource manager connection factory
reference. (See subsection 16.7.1.3 for information on how resource manager connection
factory references are declared in the deployment descriptor.)
• The EJB specification recommends, but does not require, that all resource manager connection
factory references be organized in the subcontexts of the bean’s environment, using a different
subcontext for each resource manager type. For example, all JDBC™ DataSource references
might be declared in the java:comp/env/jdbc subcontext, and all JMS connection factories
in the java:comp/env/jms subcontext. Also, all JavaMail connection factories might
be declared in the java:comp/env/mail subcontext and all URL connection factories in
the java:comp/env/url subcontext. Note that resource manager connection factory references
declared via annotations will not, by default, appear in any subcontext.
• Lookup the resource manager connection factory object in the enterprise bean’s environment
using the EJBContext lookup method or using the JNDI API.
• Invoke the appropriate method on the resource manager connection factory to obtain a connection
to the resource. The factory method is specific to the resource type. It is possible to obtain
multiple connections by calling the factory object multiple times.</font>>
Does it's mean that EJB should always retrieve connection factory through local EJB context (java:comp/env) ?
Why ?