Listening for inbound connections

This rule flags Java code that has references to the following methods and constructors:

• java.nio.channels.ServerSocketChannel.open(*)
• java.nio.channels.AsynchronousServerSocketChannel.open(*)
• new java.net.ServerSocket(*)
• new java.nio.channels.ServerSocketChannel(*)
• new java.nio.channels.AsynchronousServerSocketChannel(*)

Cloud platforms assign one port to the application for receiving inbound connections. The Liberty server listens on this port. The application cannot receive inbound connections on other ports unless they originate from the same instance of the application.