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"""
Copyright (c) 2008-2020, Jesus Cea Avion <jcea@jcea.es>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
3. Neither the name of Jesus Cea Avion nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
"""
"""TestCases for distributed transactions.
"""
import os
import unittest
from test_all import db, test_support, get_new_environment_path, \
get_new_database_path
from test_all import verbose
#----------------------------------------------------------------------
class DBTxn_distributed(unittest.TestCase):
num_txns=1234
nosync=True
must_open_db=False
def _create_env(self, must_open_db) :
self.dbenv = db.DBEnv()
self.dbenv.set_tx_max(self.num_txns)
self.dbenv.set_lk_max_lockers(self.num_txns*2)
self.dbenv.set_lk_max_locks(self.num_txns*2)
self.dbenv.set_lk_max_objects(self.num_txns*2)
if self.nosync :
self.dbenv.set_flags(db.DB_TXN_NOSYNC,True)
self.dbenv.open(self.homeDir, db.DB_CREATE | db.DB_THREAD |
db.DB_RECOVER |
db.DB_INIT_TXN | db.DB_INIT_LOG | db.DB_INIT_MPOOL |
db.DB_INIT_LOCK, 0666)
self.db = db.DB(self.dbenv)
self.db.set_re_len(db.DB_GID_SIZE)
if must_open_db :
txn=self.dbenv.txn_begin()
self.db.open(self.filename,
db.DB_QUEUE, db.DB_CREATE | db.DB_THREAD, 0666,
txn=txn)
txn.commit()
def setUp(self) :
self.homeDir = get_new_environment_path()
self.filename = "test"
return self._create_env(must_open_db=True)
def _destroy_env(self):
if self.nosync :
self.dbenv.log_flush()
self.db.close()
self.dbenv.close()
def tearDown(self):
self._destroy_env()
test_support.rmtree(self.homeDir)
def _recreate_env(self,must_open_db) :
self._destroy_env()
self._create_env(must_open_db)
def test01_distributed_transactions(self) :
txns=set()
adapt = lambda x : x
import sys
if sys.version_info[0] >= 3 :
adapt = lambda x : bytes(x, "ascii")
# Create transactions, "prepare" them, and
# let them be garbage collected.
for i in xrange(self.num_txns) :
txn = self.dbenv.txn_begin()
gid = "%%%dd" %db.DB_GID_SIZE
gid = adapt(gid %i)
self.db.put(i, gid, txn=txn, flags=db.DB_APPEND)
txns.add(gid)
txn.prepare(gid)
del txn
self._recreate_env(self.must_open_db)
# Get "to be recovered" transactions but
# let them be garbage collected.
recovered_txns=self.dbenv.txn_recover()
self.assertEqual(self.num_txns,len(recovered_txns))
for gid,txn in recovered_txns :
self.assertTrue(gid in txns)
del txn
del recovered_txns
self._recreate_env(self.must_open_db)
# Get "to be recovered" transactions. Commit, abort and
# discard them.
recovered_txns=self.dbenv.txn_recover()
self.assertEqual(self.num_txns,len(recovered_txns))
discard_txns=set()
committed_txns=set()
state=0
for gid,txn in recovered_txns :
if state==0 or state==1:
committed_txns.add(gid)
txn.commit()
elif state==2 :
txn.abort()
elif state==3 :
txn.discard()
discard_txns.add(gid)
state=-1
state+=1
del txn
del recovered_txns
self._recreate_env(self.must_open_db)
# Verify the discarded transactions are still
# around, and dispose them.
recovered_txns=self.dbenv.txn_recover()
self.assertEqual(len(discard_txns),len(recovered_txns))
for gid,txn in recovered_txns :
txn.abort()
del txn
del recovered_txns
self._recreate_env(must_open_db=True)
# Be sure there are not pending transactions.
# Check also database size.
recovered_txns=self.dbenv.txn_recover()
self.assertTrue(len(recovered_txns)==0)
self.assertEqual(len(committed_txns),self.db.stat()["nkeys"])
class DBTxn_distributedSYNC(DBTxn_distributed):
nosync=False
class DBTxn_distributed_must_open_db(DBTxn_distributed):
must_open_db=True
class DBTxn_distributedSYNC_must_open_db(DBTxn_distributed):
nosync=False
must_open_db=True
#----------------------------------------------------------------------
def test_suite():
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(DBTxn_distributed))
suite.addTest(unittest.makeSuite(DBTxn_distributedSYNC))
suite.addTest(unittest.makeSuite(DBTxn_distributed_must_open_db))
suite.addTest(unittest.makeSuite(DBTxn_distributedSYNC_must_open_db))
return suite
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
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