Are RMI Stubs in JNDI Thread-safe?

[micho]

I have a servlet talking to a Sessionbean.

Is it allowed -regarding threadsafeness - to obtain the manager in the servlets init() method and store it in an instance-membervariable of the servlet.

public class LzServlet extends HttpServlet {

 MandantenManager mm =null;

 public void init(ServletConfig config)
 {
 try
 { InitialContext ctx = new InitialContext();
 mm = (MandantenManager) ctx.lookup("BBCS/MandantenManagerBean/remote");
 }
 catch (Exception e)
 { e.printStackTrace(); }
 }

If it is not allowed, is there a performant way to solve the problem, without creating an initialContext in every call of the servelet.

Is getting the initialcontext and the lookup an "expensive" operation?

[starksm64]

Stateless beans = yes, stateful beans = no.

[micho]

For stateful beans, is there an other pattern, than getting the initial context and looking up the manager in every call of the servelet?

InitialContext ctx = new InitialContext();
mm = (MandantenManager) ctx.lookup("BBCS/MandantenManagerBean/remote")