If you want to have your server to receive data from multiple open client connections, and at the same time listen to the server socket for new connections, you need to use dxaInetGetSocketsByStatuses() or raw BSD socket functions select() or poll() to wait for status changes in the sockets. This procedure is not entirely simple, especially when you need to add new connections and remove old connection sockets. The client connection can also break unexpectedly, raising a signal, which has to be handled properly.

The Receiver object (inherited by Listener and Message Receiver) presents a simple and intuitive event-based solution to this problem. It is extensible, enabling you to build upper-level protocol events.

Creating a Listener is also easier than creating a server socket for listening.