2. Large scale
Fault Tolerant
Distributed application

3. Supervision tree

4. Behaviour

5. Non functional code

6. Functional Code

7. application
gen_server (client/server)
gen_fsm (finite state machine)
gen_event (event handling)
supervisor

9. Event Handler
slang_event_handler.erl

10. echo_server.erl

11. superVISOR
echo_supervisor.erl

12. Application
echo_app.erl echo.app

13. 2> application:load(echo).
ok
3> application:loaded_applications().
[{echo,"A dummy echo server with a simple slang detection :p", "0.0.1"},
{kernel,"ERTS CXC 138 10","2.14.3"},
{sasl,"SASL CXC 138 11","2.1.9.3"},
{stdlib,"ERTS CXC 138 10","1.17.3"}]
4> application:start(echo).
Starting supervisor.
Alarm handler switched.
Supervisor configuration:
{ok, {{one_for_one, 3, 10}, [{echo_server1,
{echo_server,start_link,[]},
permanent,5000,worker,[echo_server]}]}}
echo_server starting
ok
5> echo_server:echo("fuck you son of a bitch").
=INFO REPORT==== 12-Aug-2012::18:26:23 ===
Don't send slangs mother fucker!
=INFO REPORT==== 12-Aug-2012::18:26:23 ===
Don't send slangs son of a bitch!
"fuck you son of a bitch"

14. Monitoring

15. Thank you!
toff63