e9a9e00112
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1260 fd906abe-77d9-0310-91a1-e0d9ade77398
63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
#
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# Copyright (c) 2006 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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Transaction management.
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$Id$
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"""
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from zope.interface import implements
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from cybertools.brain.interfaces import ITransaction
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class Transaction(object):
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implements(ITransaction)
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def __init__(self):
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self.states = {}
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def setState(self, neuron, state):
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self.states[neuron] = state
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def getState(self, neuron):
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return self.states.get(neuron, neuron.state)
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transactions = []
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def getTransaction(transaction=None, create=True):
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if transaction is None:
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if transactions:
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transaction = transactions[0]
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elif create:
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transaction = Transaction()
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transactions.append(transaction)
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else:
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return None
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return transaction
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def endTransaction(transaction=None):
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if transaction is None:
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if transactions:
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del transactions[0]
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else:
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if transaction in transactions:
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del transactions[transactions.index(transaction)]
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