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IMAP IDLE cleanup(2): Add code documentation

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Add code documentation throughout the idle() function.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
This commit is contained in:
Sebastian Spaeth 2011-09-12 10:37:54 +02:00 committed by Nicolas Sebrecht
parent f369961a87
commit 0bebd65ba0
1 changed files with 14 additions and 4 deletions
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18
offlineimap/imapserver.py
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@ -456,6 +456,9 @@ class IMAPServer:
class IdleThread(object):
def __init__(self, parent, folder=None):
"""If invoked without 'folder', perform a NOOP and wait for
self.stop() to be called. If invoked with folder, switch to IDLE
mode and synchronize once we have a new message"""
self.parent = parent
self.folder = folder
self.event = Event()
@ -493,7 +496,14 @@ class IdleThread(object):
ui.unregisterthread(currentThread())
def idle(self):
"""Invoke IDLE mode until timeout or self.stop() is invoked"""
def callback(args):
"""IDLE callback function invoked by imaplib2
This is invoked when a) The IMAP server tells us something
while in IDLE mode, b) we get an Exception (e.g. on dropped
connections, or c) the standard imaplib IDLE timeout of 29
minutes kicks in."""
result, cb_arg, exc_data = args
if exc_data is None:
if not self.event.isSet():
@ -527,10 +537,8 @@ class IdleThread(object):
if "IDLE" in imapobj.capabilities:
imapobj.idle(callback=callback)
else:
self.ui.warn("IMAP IDLE not supported on connection to %s."
"Falling back to old behavior: sleeping until next"
"refresh cycle."
%(imapobj.identifier,))
self.ui.warn("IMAP IDLE not supported on server '%s'."
"Sleep until next refresh cycle." % imapobj.identifier)
imapobj.noop()
self.event.wait()
if self.event.isSet():
@ -541,5 +549,7 @@ class IdleThread(object):
# of the loop next time around.
self.parent.releaseconnection(imapobj)
if self.needsync:
# here not via self.stop, but because IDLE responded. Do
# another round and invoke actual syncing.
self.event.clear()
self.dosync()