Enterprise JavaBeans (EJB) is a server-side component model for transaction aware, distributed enterprise applications written in the Java programming language. "Enterprise JavaBeans 2.1" details the architecture of the Enterprise JavaBeans component model. After an introduction to the component paradigm, the EJB architecture basics are introduced. Based on that, the different component types (Session-, Entity- and Message-Driven-Beans) are discussed in detail. An in depth introduction to the Java Message Service (JMS) is provided to understand the ideas behind asynchronous and parallel...