3c246560a2
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3292 fd906abe-77d9-0310-91a1-e0d9ade77398
93 lines
2.6 KiB
Python
93 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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Handling asynchronous communication tasks - common and base classes.
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$Id$
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"""
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from twisted.web.client import getPage
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from zope.interface import implements
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from cybertools.agent.talk.interfaces import ISession, IInteraction
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from cybertools.util import json
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class Session(object):
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implements(ISession)
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def __init__(self, id, manager, subscriber, url):
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self.id = id
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self.manager = manager
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self.subscriber = subscriber
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self.url = url
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self.state = 'logon'
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self.sending = False
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self.queue = []
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self.interactions = {}
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self.interactionCount = 0
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def received(self, data):
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data = json.loads(data)
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# TODO: check data; notify sender?
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self.sending = False
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self._processQueue()
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def send(self, data, interaction):
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data['interaction'] = interaction.id
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if self.sending or self.queue:
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self.queue.append(data)
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else:
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self._sendData(data)
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def processQueue(self):
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if not self.queue:
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return
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self._sendData(self.queue.pop(0))
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def sendData(self, data, command='send'):
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self.sending = True
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content = dict(id=self.id, command=command, data=data)
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d = getPage(self.url, postdata=json.dumps(content))
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d.addCallback(s.received)
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def connected(self, data):
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data = json.loads(data)
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self.state = 'open'
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self.subscriber.onMessage(None, data)
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self.sending = False
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self.processQueue()
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def generateInteractionId(self):
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self.interactionCount += 1
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return '%07i' % self.interactionCount
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class Interaction(object):
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implements(IInteraction)
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finished = False
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def __init__(self, session):
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self.session = session
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self.id = self.session.generateInteractionId()
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self.session.interactions[self.id] = self
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