This class is designed for creating simple interactive services, which work in text line-by-line mode.
These services can work with help of standard UNIX inetd program.
For example, it is possible to implement news-server (NNTP) in Parser.
Add a line like this to your /etc/inetd.conf file and restart inetd:
nntp stream tcp nowait unix_user /path/to/parser3 /path/to/parser3 /path/to/nntp.p
In nntp.p script code your NNTP server.
This would give people an ability to use it-nntp://your_server.