From 2e7024419a98e0dc69493010faf24b4a2c88d37e Mon Sep 17 00:00:00 2001
From: Nathan Fritz <nathan@andyet.net>
Date: Thu, 27 May 2010 09:32:28 +0800
Subject: adding scheduler

---
 sleekxmpp/xmlstream/scheduler.py | 76 ++++++++++++++++++++++++++++++++++++++++
 sleekxmpp/xmlstream/xmlstream.py |  9 +++--
 2 files changed, 82 insertions(+), 3 deletions(-)
 create mode 100644 sleekxmpp/xmlstream/scheduler.py

(limited to 'sleekxmpp')

diff --git a/sleekxmpp/xmlstream/scheduler.py b/sleekxmpp/xmlstream/scheduler.py
new file mode 100644
index 00000000..5cb8aff0
--- /dev/null
+++ b/sleekxmpp/xmlstream/scheduler.py
@@ -0,0 +1,76 @@
+try:
+	import queue
+except ImportError:
+	import Queue as queue
+import time
+import threading
+
+class Task(object):
+	"""Task object for the Scheduler class"""
+	def __init__(self, name, seconds, callback, args=None, kwargs=None, repeat=False, qpointer=None):
+		self.name = name
+		self.seconds = seconds
+		self.callback = callback
+		self.args = args or tuple()
+		self.kwargs = kwargs or {}
+		self.repeat = repeat
+		self.next = time.time() + self.seconds
+		self.qpointer = qpointer
+	
+	def run(self):
+		if self.qpointer is not None:
+			self.qpointer.put(('schedule', self.callback, self.args))
+		else:
+			self.callback(*self.args, **self.kwargs)
+		self.reset()
+		return self.repeat
+	
+	def reset(self):
+		self.next = time.time() + self.seconds
+
+class Scheduler(object):
+	"""Threaded scheduler that allows for updates mid-execution unlike http://docs.python.org/library/sched.html#module-sched"""
+	def __init__(self):
+		self.addq = queue.Queue()
+		self.schedule = []
+		self.thread = None
+		self.run = True
+	
+	def process(self, threaded=True):
+		if threaded:
+			self.thread = threading.Thread(name='shedulerprocess', target=self._process)
+			self.thread.start()
+		else:
+			self._process()
+
+	def _process(self):
+		while self.run:
+			wait = 5
+			updated = False
+			if self.schedule:
+				wait = self.schedule[0].next - time.time()
+			try:
+				newtask = self.addq.get(True, wait)
+			except queue.Empty:
+				cleanup = []
+				for task in self.schedule:
+					if time.time() >= task.next:
+						updated = True
+						if not task.run():
+							cleanup.append(task)
+					else:
+						break
+				for task in cleanup:
+					x = self.schedule.pop(self.schedule.index(task))
+			else:
+				updated = True
+				self.schedule.append(newtask)
+			finally:
+				if updated: self.schedule = sorted(self.schedule, key=lambda task: task.next)
+				print [x.name for x in self.schedule]
+
+	def add(self, name, seconds, callback, args=None, kwargs=None, repeat=False, qpointer=None):
+		self.addq.put(Task(name, seconds, callback, args, kwargs, repeat, qpointer))
+	
+	def quit(self):
+		self.run = False
diff --git a/sleekxmpp/xmlstream/xmlstream.py b/sleekxmpp/xmlstream/xmlstream.py
index 13a87a63..3f0ab182 100644
--- a/sleekxmpp/xmlstream/xmlstream.py
+++ b/sleekxmpp/xmlstream/xmlstream.py
@@ -22,6 +22,7 @@ import time
 import traceback
 import types
 import xml.sax.saxutils
+from . import scheduler
 
 HANDLER_THREADS = 1
 
@@ -75,6 +76,7 @@ class XMLStream(object):
 
 		self.eventqueue = queue.Queue()
 		self.sendqueue = queue.Queue()
+		self.scheduler = scheduler.Scheduler()
 
 		self.namespace_map = {}
 
@@ -145,6 +147,7 @@ class XMLStream(object):
 		raise RestartStream()
 	
 	def process(self, threaded=True):
+		self.scheduler.process(threaded=True)
 		for t in range(0, HANDLER_THREADS):
 			self.__thread['eventhandle%s' % t] = threading.Thread(name='eventhandle%s' % t, target=self._eventRunner)
 			self.__thread['eventhandle%s' % t].start()
@@ -156,8 +159,8 @@ class XMLStream(object):
 		else:
 			self._process()
 	
-	def schedule(self, seconds, handler, args=None):
-		threading.Timer(seconds, handler, args).start()
+	def schedule(self, name, seconds, callback, args=None, kwargs=None, repeat=False):
+		self.scheduler.add(name, seconds, callback, args, kwargs, repeat, qpointer=self.eventqueue)
 	
 	def _process(self):
 		"Start processing the socket."
@@ -336,7 +339,7 @@ class XMLStream(object):
 					except Exception as e:
 						traceback.print_exc()
 						args[0].exception(e)
-				elif etype == 'sched':
+				elif etype == 'schedule':
 					try:
 						handler.run(*args)
 					except:
-- 
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