Enterprise Java Beans

The importance of software components for middleware is due to the fact that frequently, components are the basis for middleware implementation. From a historic perspective, the first commercial component models were COM [5] (from Microsoft) and JavaBeans [6]. These models evolved to. NET [7] and newer versions of Enterprise Java Beans (EJB) [8]. Some of the aforementioned middleware even included newer component-based extensions such as the CORBA Component Model (CCM) [9] in the case of CORBA. 

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