EJB Bad Practices: Use of Sockets

Abstract
The program violates the Enterprise JavaBeans specification by using sockets.

Description
The Enterprise JavaBeans specification requires that every bean provider follow a set of programming guidelines designed to ensure that the bean will be portable and behave consistently in any EJB container [1].

In this case, the program violates the following EJB guideline:

"An enterprise bean must not attempt to listen on a socket, accept connections on a socket, or use a socket for multicast."

A requirement that the specification justifies in the following way:

"The EJB architecture allows an enterprise bean instance to be a network socket client, but it does not allow it to be a network server. Allowing the instance to become a network server would conflict with the basic function of the enterprise bean – to serve the EJB clients."