Module: cogen
This is a library for network oriented, coroutine based programming.
The interfaces and events/operations aim to mimic thread features. Coroutines
work as simple generators, the operations and events work as objects passed in
and out of the generator, these objects are managed by the scheduler/network
poller.
Check each modules for specific help.
Check each modules for specific help.
Modules
common
A module for quick importing the essential core stuff.
(coroutine, Scheduler, events, sockets, priority)
core
This module holds the essential stuff.
Programming with this library should be straghtforward. A coroutine is just a generator wrapped in a operation handling class:
Programming with this library should be straghtforward. A coroutine is just a generator wrapped in a operation handling class:
@coroutine def mycoro(bla): yield <operation> yield <operation>
- the
operation
instructs the scheduler what to do with the
coroutine: suspend it till someting happens, add another coro in the scheduler, raise a event and so on.
- the
operations
are split up in 2 modules: events and sockets- the
operations
from sockets are related to network, like reading and
- the
writing, and these are done asynchronously but your code in the coroutine will see them as a regular synchronous or blocking call.
- the
operations
from events are related to signals and
coroutine/scheduler management.
- if a
operation
has a result associated then the yield will return that
result (eg. a string or a (connection, address) tuple) otherwise it will return the operation instance.Typical example:
import sys, os from cogen.common import * @coroutine def server(): srv = sockets.Socket() srv.setblocking(0) srv.bind(('localhost',777)) srv.listen(10) while 1: print "Listening..." conn, addr = yield sockets.Accept(srv) print "Connection from %s:%s" % addr m.add(handler, conn, addr) @coroutine def handler(sock, addr): yield sockets.Write(sock, "WELCOME TO ECHO SERVER !\r\n") while 1: line = yield sockets.ReadLine(sock, 8192) if line.strip() == 'exit': yield sockets.Write(sock, "GOOD BYE") sock.close() return yield sockets.Write(sock, line) m = Scheduler() m.add(server) m.run()
web
This module holds a wsgi server and future web-related code.