/usr/lib/python2.7/dist-packages/transaction/tests/examples.py is in python-transaction 1.4.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | ##############################################################################
#
# Copyright (c) 2004 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Sample objects for use in tests
"""
class DataManager(object):
"""Sample data manager
Used by the 'datamanager' chapter in the Sphinx docs.
"""
def __init__(self):
self.state = 0
self.sp = 0
self.transaction = None
self.delta = 0
self.prepared = False
def inc(self, n=1):
self.delta += n
def prepare(self, transaction):
if self.prepared:
raise TypeError('Already prepared')
self._checkTransaction(transaction)
self.prepared = True
self.transaction = transaction
self.state += self.delta
def _checkTransaction(self, transaction):
if (transaction is not self.transaction
and self.transaction is not None):
raise TypeError("Transaction missmatch",
transaction, self.transaction)
def abort(self, transaction):
self._checkTransaction(transaction)
if self.transaction is not None:
self.transaction = None
if self.prepared:
self.state -= self.delta
self.prepared = False
self.delta = 0
def commit(self, transaction):
if not self.prepared:
raise TypeError('Not prepared to commit')
self._checkTransaction(transaction)
self.delta = 0
self.transaction = None
self.prepared = False
def savepoint(self, transaction):
if self.prepared:
raise TypeError("Can't get savepoint during two-phase commit")
self._checkTransaction(transaction)
self.transaction = transaction
self.sp += 1
return Rollback(self)
class Rollback(object):
def __init__(self, dm):
self.dm = dm
self.sp = dm.sp
self.delta = dm.delta
self.transaction = dm.transaction
def rollback(self):
if self.transaction is not self.dm.transaction:
raise TypeError("Attempt to rollback stale rollback")
if self.dm.sp < self.sp:
raise TypeError("Attempt to roll back to invalid save point",
self.sp, self.dm.sp)
self.dm.sp = self.sp
self.dm.delta = self.delta
class ResourceManager(object):
""" Sample resource manager.
Used by the 'resourcemanager' chapter in the Sphinx docs.
"""
def __init__(self):
self.state = 0
self.sp = 0
self.transaction = None
self.delta = 0
self.txn_state = None
def _check_state(self, *ok_states):
if self.txn_state not in ok_states:
raise ValueError("txn in state %r but expected one of %r" %
(self.txn_state, ok_states))
def _checkTransaction(self, transaction):
if (transaction is not self.transaction
and self.transaction is not None):
raise TypeError("Transaction missmatch",
transaction, self.transaction)
def inc(self, n=1):
self.delta += n
def tpc_begin(self, transaction):
self._checkTransaction(transaction)
self._check_state(None)
self.transaction = transaction
self.txn_state = 'tpc_begin'
def tpc_vote(self, transaction):
self._checkTransaction(transaction)
self._check_state('tpc_begin')
self.state += self.delta
self.txn_state = 'tpc_vote'
def tpc_finish(self, transaction):
self._checkTransaction(transaction)
self._check_state('tpc_vote')
self.delta = 0
self.transaction = None
self.prepared = False
self.txn_state = None
def tpc_abort(self, transaction):
self._checkTransaction(transaction)
if self.transaction is not None:
self.transaction = None
if self.txn_state == 'tpc_vote':
self.state -= self.delta
self.txn_state = None
self.delta = 0
def savepoint(self, transaction):
if self.txn_state is not None:
raise TypeError("Can't get savepoint during two-phase commit")
self._checkTransaction(transaction)
self.transaction = transaction
self.sp += 1
return SavePoint(self)
def discard(self, transaction):
pass
class SavePoint(object):
def __init__(self, rm):
self.rm = rm
self.sp = rm.sp
self.delta = rm.delta
self.transaction = rm.transaction
def rollback(self):
if self.transaction is not self.rm.transaction:
raise TypeError("Attempt to rollback stale rollback")
if self.rm.sp < self.sp:
raise TypeError("Attempt to roll back to invalid save point",
self.sp, self.rm.sp)
self.rm.sp = self.sp
self.rm.delta = self.delta
def discard(self):
pass
|