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#!/usr/bin/env python
#
# Public Domain 2014-present 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.
import struct, wttest
def timestamp(kind, ts):
return "{}_timestamp={:X}".format(kind, ts)
# test_debug_mode03.py
# Test the debug mode settings. Test table_logging use.
class test_debug_mode03(wttest.WiredTigerTestCase):
conn_config = 'log=(enabled=true,file_max=100K),debug_mode=(table_logging=true)'
uri = 'file:test_debug'
entries = 100
value = b'\x01\x02abcd\x03\x04'
def add_data(self):
# Add a binary value we can search for in the log.
keys = range(0, self.entries)
c = self.session.open_cursor(self.uri, None)
for k in keys:
c[k] = self.value
c.close()
def add_data_at_ts(self, ts):
self.session.begin_transaction()
self.add_data()
self.session.commit_transaction(timestamp("commit", ts))
def find_log_recs(self):
# Open a log cursor. We should find log records that have
# the value we inserted.
c = self.session.open_cursor("log:", None)
count = 0
while c.next() == 0:
# lsn.file, lsn.offset, opcount
keys = c.get_key()
# txnid, rectype, optype, fileid, logrec_key, logrec_value
values = c.get_value()
# Look for log records that have a key/value pair.
if values[4] != b'':
if self.value in values[5]: # logrec_value
count += 1
c.close()
return count
def pack_large_int(self, large):
# This line in intpacking.py tells us how to pack a large integer:
#
# First byte | Next bytes | Min Value | Max Value
# [11 10llll] | l | 2^13 + 2^6 | 2^64 - 1
#
# An 8 byte integer is packed as byte 0xe8, followed by 8 bytes packed for big endian.
LARGE_INT = 2**13 + 2**6
self.assertGreaterEqual(large, LARGE_INT)
packed_int = b'\xe8' + struct.pack('>Q', large - LARGE_INT) # >Q == 8 bytes big endian
return packed_int
def find_ts_log_rec(self, ts):
# The timestamp we're looking for will be encoded as a 'packed integer' in the log file. We
# don't need a general purpose encoder here, we just need to know how to pack large integers.
packed_int = self.pack_large_int(ts)
# Open a log cursor, and we look for the timestamp somewhere in the values.
c = self.session.open_cursor("log:", None)
count = 0
while c.next() == 0:
# lsn.file, lsn.offset, opcount
keys = c.get_key()
# txnid, rectype, optype, fileid, logrec_key, logrec_value
values = c.get_value()
#self.tty('LOG: keys={}, values={}\n val5={}\n packed={}'.format(
# str(keys), str(values), values[5].hex(), packed_int.hex()))
if packed_int in values[5]: # logrec_value
count += 1
c.close()
return count
def test_table_logging(self):
self.session.create(self.uri, 'key_format=i,value_format=u,log=(enabled=false)')
self.add_data()
count = self.find_log_recs()
self.assertEqual(count, self.entries)
# Test that both zero and one remove as usual. And test reconfigure.
def test_table_logging_off(self):
self.conn.reconfigure("debug_mode=(table_logging=false)")
self.session.create(self.uri, 'key_format=i,value_format=u,log=(enabled=false)')
self.add_data()
count = self.find_log_recs()
self.assertEqual(count, 0)
# Debug table logging with operations from timestamp_transaction
def test_table_logging_ts(self):
# We pick a large timestamp because encoding a large integer is relatively easy
# and we won't get any false positives when searching the log file.
base_ts = 0x1020304050600000
self.session.create(self.uri, 'key_format=i,value_format=u,log=(enabled=false)')
self.add_data_at_ts(base_ts + 0x100)
self.session.begin_transaction()
c = self.session.open_cursor(self.uri, None)
c[self.entries] = self.value
c.close()
self.session.timestamp_transaction(timestamp("read", base_ts + 0x200))
self.session.prepare_transaction(timestamp("prepare", base_ts + 0x201))
self.session.timestamp_transaction(timestamp("commit", base_ts + 0x202))
self.session.timestamp_transaction(timestamp("durable", base_ts + 0x203))
self.session.commit_transaction()
self.assertGreater(self.find_ts_log_rec(base_ts + 0x100), 0)
self.assertGreater(self.find_ts_log_rec(base_ts + 0x200), 0)
self.assertGreater(self.find_ts_log_rec(base_ts + 0x201), 0)
self.assertGreater(self.find_ts_log_rec(base_ts + 0x202), 0)
self.assertGreater(self.find_ts_log_rec(base_ts + 0x203), 0)
if __name__ == '__main__':
wttest.run()
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