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#!/usr/bin/env python
#
# Public Domain 2014-2017 MongoDB, Inc.
# Public Domain 2008-2014 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_timestamp02.py
# Timestamps: basic semantics
#
import random
from suite_subprocess import suite_subprocess
import wiredtiger, wttest
from wtscenario import make_scenarios
def timestamp_str(t):
return '%x' % t
def timestamp_ret_str(t):
s = timestamp_str(t)
if len(s) % 2 == 1:
s = '0' + s
return s
class test_timestamp02(wttest.WiredTigerTestCase, suite_subprocess):
tablename = 'test_timestamp02'
uri = 'table:' + tablename
scenarios = make_scenarios([
('col', dict(extra_config=',key_format=r')),
('lsm', dict(extra_config=',type=lsm')),
('row', dict(extra_config='')),
])
conn_config = 'log=(enabled)'
# 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)
self.assertEqual(actual, expected)
# Search for the expected items as well as iterating
for k, v in expected.iteritems():
self.assertEqual(c[k], v, "for key " + str(k))
c.close()
if txn_config:
session.commit_transaction()
def test_basic(self):
if not wiredtiger.timestamp_build():
self.skipTest('requires a timestamp build')
self.session.create(self.uri,
'key_format=i,value_format=i' + self.extra_config)
c = self.session.open_cursor(self.uri)
# Insert keys 1..100 each with timestamp=key, in some order
orig_keys = range(1, 101)
keys = orig_keys[:]
random.shuffle(keys)
for k in keys:
self.session.begin_transaction()
c[k] = 1
self.session.commit_transaction('commit_timestamp=' + timestamp_str(k))
# Now check that we see the expected state when reading at each
# timestamp
for i, t in enumerate(orig_keys):
self.check(self.session, 'read_timestamp=' + timestamp_str(t),
dict((k, 1) for k in orig_keys[:i+1]))
# Bump the oldest timestamp, we're not going back...
self.assertEqual(self.conn.query_timestamp(), timestamp_ret_str(100))
self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(100))
# Update them and retry.
random.shuffle(keys)
for k in keys:
self.session.begin_transaction()
c[k] = 2
self.session.commit_transaction('commit_timestamp=' + timestamp_str(k + 100))
for i, t in enumerate(orig_keys):
self.check(self.session, 'read_timestamp=' + timestamp_str(t + 100),
dict((k, (2 if j <= i else 1)) for j, k in enumerate(orig_keys)))
# Bump the oldest timestamp, we're not going back...
self.assertEqual(self.conn.query_timestamp(), timestamp_ret_str(200))
self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(200))
# Remove them and retry
random.shuffle(keys)
for k in keys:
self.session.begin_transaction()
del c[k]
self.session.commit_transaction('commit_timestamp=' + timestamp_str(k + 200))
for i, t in enumerate(orig_keys):
self.check(self.session, 'read_timestamp=' + timestamp_str(t + 200),
dict((k, 2) for k in orig_keys[i+1:]))
if __name__ == '__main__':
wttest.run()
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