mirror of https://github.com/python/cpython
164 lines
5.0 KiB
Python
164 lines
5.0 KiB
Python
"""TestCases for distributed transactions.
|
|
"""
|
|
|
|
import os
|
|
import unittest
|
|
|
|
from test_all import db, test_support, get_new_environment_path, \
|
|
get_new_database_path
|
|
|
|
try :
|
|
a=set()
|
|
except : # Python 2.3
|
|
from sets import Set as set
|
|
else :
|
|
del a
|
|
|
|
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 :
|
|
if db.version() >= (4,2) :
|
|
txn=self.dbenv.txn_begin()
|
|
self.db.open(self.filename,
|
|
db.DB_QUEUE, db.DB_CREATE | db.DB_THREAD, 0666,
|
|
txn=txn)
|
|
txn.commit()
|
|
else :
|
|
self.db.open(self.filename,
|
|
db.DB_QUEUE, db.DB_CREATE | db.DB_THREAD, 0666)
|
|
|
|
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 or (db.version()[:2] == (4,6)): # Known bug
|
|
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()
|
|
if db.version() >= (4,5) :
|
|
suite.addTest(unittest.makeSuite(DBTxn_distributed))
|
|
suite.addTest(unittest.makeSuite(DBTxn_distributedSYNC))
|
|
if db.version() >= (4,6) :
|
|
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')
|