9db11e8486
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2721 fd906abe-77d9-0310-91a1-e0d9ade77398
87 lines
2.6 KiB
Python
87 lines
2.6 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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Queueable agent base/sample classes.
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$Id$
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"""
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from twisted.internet.defer import succeed
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from zope.interface import implements
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from cybertools.agent.base.agent import Agent, Master
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from cybertools.agent.common import states
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from cybertools.agent.components import agents
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from cybertools.agent.interfaces import IQueueableAgent
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class QueueableAgent(Agent):
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implements(IQueueableAgent)
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currentJob = None
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def __init__(self, master):
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super(QueueableAgent, self).__init__(master)
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self.queue = []
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def send(self, job):
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if self.currentJob is None:
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if self.queue: # this should not happen...
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self.queue.insert(0, job)
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job = self.queue.pop()
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self.execute(job)
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else:
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self.queue.insert(0, job)
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def execute(self, job):
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job.state = states.running
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self.currentJob = job
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self.params = job.params
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d = self.process()
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d.addCallbacks(self.completed, self.error)
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def process(self):
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# do something with the current job, return a deferred
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print ('Job %s on agent %s has been executed.'
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% (self.currentJob.identifier, self.name))
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return succeed('Done')
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def completed(self, result):
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job = self.currentJob
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job.state = states.completed
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self.log(job)
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self.master.notify(job, result)
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self.finishJob()
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def error(self, result):
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print '*** error', result
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job = self.currentJob
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job.state = states.aborted
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self.log(self.currentJob, result='Error')
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self.master.notify(job, result)
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self.finishJob()
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def finishJob(self):
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self.currentJob = None
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if self.queue:
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job = self.queue.pop()
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self.execute(job, job.params)
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agents.register(QueueableAgent, Master, name='core.sample')
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