stateless-session-bean

问题 A stateful session bean is defined as follows: Stateful Session Beans The state of an object consists of the values of its instance variables. In a stateful session bean, the instance variables represent the state of a unique client-bean session. Because the client interacts (“talks”) with its bean, this state is often called the conversational state. A stateless session bean is defined as follows: Stateless Session Beans A stateless session bean does not maintain a conversational state with

问题 Stateless beans in Java do not keep their state between two calls from the client. So in a nutshell we might consider them as objects with business methods. Each method takes parameters and return results. When the method is invoked some local variables are being created in execution stack. When the method returns the locals are removed from the stack and if some temporary objects were allocated they are garbage collected anyway. From my perspective that doesn’t differ from calling method of

问题 I was reading about stateless session bean and couldn't understand it's use. Excerpt from sun tutorial below "..Because stateless session beans can support multiple clients, they can offer better scalability for applications that require large numbers of clients" Where stateless session bean is being used? what kind of applications use it? What mechanism has been being used before the advent of 'stateless session bean' to support multiple clients in the similar contexts? Can anyone please

问题 Is it possible to inject a request-scoped CDI bean into a Stateless session bean? I had asked a related question and thought the specific CDI @RequestScoped into @Stateless question merited its own post. Passing state between EJB methods / @RequestScoped and @Stateless I also asked a similar question about JMS @MessageDriven beans - basically want to know the same about @Stateless. @RequestScoped CDI injection into @MessageDriven bean 回答1: You can absolutely do what you mention and use