FtpServer thread model?

[Erix Yao]

What is the thread model of the ftp server ?
Is it running in only one thread except the mina's thread pool?
I have an idea, that after the command has been analyzed, the excution of
each command should be thrown into a excutor or a thread pool, using
asynchrouse mechanism to enhance the throughout of the server.
How do you think so ?