3f69f638d3
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2483 fd906abe-77d9-0310-91a1-e0d9ade77398
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
#
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# Copyright (c) 2008 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Basic job scheduler using twisted.
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$Id$
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"""
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from time import time
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from zope.interface import implements
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from cybertools.agent.base.agent import Master
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from cybertools.agent.base.schedule import Scheduler as BaseScheduler
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from cybertools.agent.components import schedulers
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from cybertools.agent.interfaces import IScheduler
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from twisted.internet import reactor
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from twisted.internet.defer import Deferred
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class Scheduler(BaseScheduler):
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implements(IScheduler)
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def __init__(self, agent):
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self.agent = agent
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self.queue = {}
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def schedule(self, job, startTime=None):
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job.startTime = startTime or int(time())
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#self.queue.append(job)
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if startTime is None:
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startTime = int(time())
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job.startTime = startTime
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#job.scheduler = self # obsolete, set already in job's __init__()
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while startTime in self.queue: # TODO: use another key for the queue;
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startTime += 1 # is the queue necessary anyway?
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self.queue[startTime] = job
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reactor.callLater(startTime-int(time()), job.execute)
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#job.execute()
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return startTime
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def getJobsToExecute(startTime=0):
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return [j for j in self.queue.values() if startTime <= j.startTime]
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schedulers.register(Scheduler, Master, name='core')
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