""" Copyright (c) 2008-2020, Jesus Cea Avion 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')