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#!/usr/bin/env python
#
# Public Domain 2008-2013 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# test_txn02.py
# Transactions: commits and rollbacks
#
import wiredtiger, wttest
from wtscenario import multiply_scenarios, number_scenarios
class test_txn02(wttest.WiredTigerTestCase):
tablename = 'test_txn02'
uri = 'table:' + tablename
types = [
('row', dict(tabletype='row',
create_params = 'key_format=i,value_format=i')),
('var', dict(tabletype='var',
create_params = 'key_format=r,value_format=i')),
('fix', dict(tabletype='fix',
create_params = 'key_format=r,value_format=8t')),
]
op1s = [
('i4', dict(op1=('insert', 4))),
('r1', dict(op1=('remove', 1))),
('u10', dict(op1=('update', 10))),
]
op2s = [
('i6', dict(op2=('insert', 6))),
('r4', dict(op2=('remove', 4))),
('u4', dict(op2=('update', 4))),
]
op3s = [
('i12', dict(op3=('insert', 12))),
('r4', dict(op3=('remove', 4))),
('u4', dict(op3=('update', 4))),
]
op4s = [
('i14', dict(op4=('insert', 14))),
('r12', dict(op4=('remove', 12))),
('u12', dict(op4=('update', 12))),
]
txn1s = [('t1c', dict(txn1='commit')), ('t1r', dict(txn1='rollback'))]
txn2s = [('t2c', dict(txn2='commit')), ('t2r', dict(txn2='rollback'))]
txn3s = [('t3c', dict(txn3='commit')), ('t3r', dict(txn3='rollback'))]
txn4s = [('t4c', dict(txn4='commit')), ('t4r', dict(txn4='rollback'))]
scenarios = number_scenarios(multiply_scenarios('.', types,
op1s, txn1s, op2s, txn2s, op3s, txn3s, op4s, txn4s)) # [:1]
# Overrides WiredTigerTestCase
def setUpConnectionOpen(self, dir):
conn = wiredtiger.wiredtiger_open(dir, 'create,' +
('error_prefix="%s: ",' % self.shortid()) +
'transactional,')
self.pr(`conn`)
self.session2 = conn.open_session()
return conn
# Check that a cursor (optionally started in a new transaction), sees the
# expected values.
def check(self, session, txn_config, expected):
if txn_config:
session.begin_transaction(txn_config)
c = session.open_cursor(self.uri, None)
actual = dict((k, v) for k, v in c if v != 0)
# Search for the expected items as well as iterating
for k, v in expected.iteritems():
c.set_key(k)
c.search()
self.assertEqual(c.get_value(), v)
c.close()
if txn_config:
session.commit_transaction()
self.assertEqual(actual, expected)
# Check the state of the system with respect to the current cursor and
# different isolation levels.
def check_all(self, current, committed):
# Transactions see their own changes.
# Read-uncommitted transactions see all changes.
# Snapshot and read-committed transactions should not see changes.
self.check(self.session, None, current)
self.check(self.session2, "isolation=snapshot", committed)
self.check(self.session2, "isolation=read-committed", committed)
self.check(self.session2, "isolation=read-uncommitted", current)
def test_ops(self):
self.session.create(self.uri, self.create_params)
# Set up the table with entries for 1 and 10
# We use the overwrite config so insert can update as needed.
c = self.session.open_cursor(self.uri, None, 'overwrite')
c.set_value(1)
c.set_key(1)
c.insert()
c.set_key(10)
c.insert()
current = {1:1, 10:1}
committed = current.copy()
ops = (self.op1, self.op2, self.op3, self.op4)
txns = (self.txn1, self.txn2, self.txn3, self.txn4)
# print ', '.join('%s(%d)[%s]' % (ok[0], ok[1], txn)
# for ok, txn in zip(ops, txns))
for i, ot in enumerate(zip(ops, txns)):
self.session.begin_transaction()
ok, txn = ot
op, k = ok
# print '%s(%d)[%s]' % (ok[0], ok[1], txn)
if op == 'insert' or op == 'update':
c.set_key(k)
c.set_value(i + 2)
c.insert()
current[k] = i + 2
elif op == 'remove':
c.set_key(k)
c.remove()
if k in current:
del current[k]
# Check the state after each operation.
self.check_all(current, committed)
if txn == 'commit':
committed = current.copy()
self.session.commit_transaction()
elif txn == 'rollback':
current = committed.copy()
self.session.rollback_transaction()
# Check the state after each commit/rollback.
self.check_all(current, committed)
if __name__ == '__main__':
wttest.run()
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