Lecture Notes Twenty-Two: Java Networking
This lecture I'd like to help a bit with the homework and also
discuss Java networking. A discussion of what's needed for the
homework (or what might be needed, depending on your progress)
will be part of the lecture today. Java networking is not part
of A201 or A202 usually so we need to look at it first in this
class. There are three networking methodologies we will be
looking at:
- regular sockets
- remote method invocation
- specialized classes for HTTP
For all of these I will be using notes that I wrote before the
semester started. So dates will vary, and you will see that they
have been used in various courses over time.
Now (today) I would like to go through a relatively new (1998) method of
networking that is Java specific: remote method invocation. This relates
to other standards by fitting in between RPC and CORBA. Regardless we just
want to illustrate the simplicity and power of the method.
Our development will be in three stages.
- Review the RMI Recipe
- Describe the Essence of RMI
- Implement callbacks, and a simple (standalone) Chat Application
The recipe is very parsimonious (and good). I am particularly proud of
the smaller document (the essence of RMI), at least that's how I feel now.
The implementation of the chat application with callbacks also makes me feel
a bit elated, and I hope you will like it. We need it as a reference before
we move to the web based applet servlet chat application next week.
Last updated: Nov 6, 2001 by Adrian German for A348/A548
