About hanle object in ejb

Question

Hello
What is role of handle object in ejb & how we can use .please give a suitable example.
Regards
Rajesh Pandey
j2ee developer
mob:--9811903737
email:-- [email protected]

Answer 1

A Handle is a serializable reference to a remote EJB. It can be saved and then used at a later time to obtain a reference to that specific EJB object (for example a specific entity bean corresponding to a specific database record). When the handle is used, it is a much quicker process. Instead of having to do something like:
javax.naming.Context context = new javax.naming.InitialContext();
Object ref = ctx.lookup("EmployeeHomeRemote");
EmployeeHomeRemote home = (EmployeeHomeRemote) PortableRemoteOjbect.narrow(ref,EmployeeHomeRemote.class);
EmployeeRemote employee = home.findByPrimaryKey(primaryKey);all you would have to do is:
Object ref = handle.getEJBObject();
EmployeeRemote employee = (EmployeeRemote) PortableRemoteObject.jarrow(ref,EmployeeRemote.class);Since you are avoiding the naming lookup, it is also much more efficient. You could use it if you need recurring access to a particular record such as a user's preferences record in a database. It can also be used to obtain references to session beans (such as a particular stateful session bean).