Why bean stateless pool?

Question

Usually we use a singleton instance for the business / dao level. What is the reason for merging a stateless beans session in the case of EJB?

Answer 1

“Stateless” in the name refers to the state of the session, that is, to the state that is maintained between the bean calls held throughout the session. However, a beans-free session is still allowed to have instance variables. These instance variables should not be related to the state of the conversation, but "shared" between clients.

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Answer 2

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