Enterprise Java Beans (EJBs) are classes that encapsulate business functionalities, each of a certain kind. Unlike normal Java classes, however, EJBs run in a container environment , which means the server adds system-level services to them. These services include lifecycle management (instantiating and destroying, when and how), transactionality (building logical, atomic, rollback-enabled units of work), and security (which users can invoke which methods). Because Java MVC runs inside such a container, namely Jakarta EE, EJBs are a good way for Java MVC applications to encapsulate their business ...
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