"""TestCases for multi-threaded access to a DB.
"""
import os
import sys
import time
import errno
from random import random
DASH = '-'
try:
WindowsError
except NameError:
class WindowsError(Exception):
pass
import unittest
from test_all import db,dbutils,test_support,verbose,have_threads,\
get_new_environment_path, get_new_database_path
if have_threads :
from threading import Thread
if sys.version_info[0] < 3 :
from threading import currentThread
else :
from threading import current_thread
#----------------------------------------------------------------------
class BaseThreadedTestCase(unittest.TestCase):
dbtype = db.DB_UNKNOWN # must be set in derived class
dbopenflags = 0
dbsetflags = 0
envflags = 0
if sys.version_info < (2, 4) :
def assertTrue(self, expr, msg=None):
self.failUnless(expr,msg=msg)
def setUp(self):
if verbose:
dbutils._deadlock_VerboseFile = sys.stdout
self.homeDir = get_new_environment_path()
self.env = db.DBEnv()
self.setEnvOpts()
self.env.open(self.homeDir, self.envflags | db.DB_CREATE)
self.filename = self.__class__.__name__ + '.db'
self.d = db.DB(self.env)
if self.dbsetflags:
self.d.set_flags(self.dbsetflags)
self.d.open(self.filename, self.dbtype, self.dbopenflags|db.DB_CREATE)
def tearDown(self):
self.d.close()
self.env.close()
test_support.rmtree(self.homeDir)
def setEnvOpts(self):
pass
def makeData(self, key):
return DASH.join([key] * 5)
#----------------------------------------------------------------------
class ConcurrentDataStoreBase(BaseThreadedTestCase):
dbopenflags = db.DB_THREAD
envflags = db.DB_THREAD | db.DB_INIT_CDB | db.DB_INIT_MPOOL
readers = 0 # derived class should set
writers = 0
records = 1000
def test01_1WriterMultiReaders(self):
if verbose:
print '\n', '-=' * 30
print "Running %s.test01_1WriterMultiReaders..." % \
self.__class__.__name__
keys=range(self.records)
import random
random.shuffle(keys)
records_per_writer=self.records//self.writers
readers_per_writer=self.readers//self.writers
self.assertEqual(self.records,self.writers*records_per_writer)
self.assertEqual(self.readers,self.writers*readers_per_writer)
self.assertTrue((records_per_writer%readers_per_writer)==0)
readers = []
for x in xrange(self.readers):
rt = Thread(target = self.readerThread,
args = (self.d, x),
name = 'reader %d' % x,
)#verbose = verbose)
if sys.version_info[0] < 3 :
rt.setDaemon(True)
else :
rt.daemon = True
readers.append(rt)
writers=[]
for x in xrange(self.writers):
a=keys[records_per_writer*x:records_per_writer*(x+1)]
a.sort() # Generate conflicts
b=readers[readers_per_writer*x:readers_per_writer*(x+1)]
wt = Thread(target = self.writerThread,
args = (self.d, a, b),
name = 'writer %d' % x,
)#verbose = verbose)
writers.append(wt)
for t in writers:
if sys.version_info[0] < 3 :
t.setDaemon(True)
else :
t.daemon = True
t.start()
for t in writers:
t.join()
for t in readers:
t.join()
def writerThread(self, d, keys, readers):
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
if verbose:
print "%s: creating records %d - %d" % (name, start, stop)
count=len(keys)//len(readers)
count2=count
for x in keys :
key = '%04d' % x
dbutils.DeadlockWrap(d.put, key, self.makeData(key),
max_retries=12)
if verbose and x % 100 == 0:
print "%s: records %d - %d finished" % (name, start, x)
count2-=1
if not count2 :
readers.pop().start()
count2=count
if verbose:
print "%s: finished creating records" % name
if verbose:
print "%s: thread finished" % name
def readerThread(self, d, readerNum):
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
for i in xrange(5) :
c = d.cursor()
count = 0
rec = c.first()
while rec:
count += 1
key, data = rec
self.assertEqual(self.makeData(key), data)
rec = c.next()
if verbose:
print "%s: found %d records" % (name, count)
c.close()
if verbose:
print "%s: thread finished" % name
class BTreeConcurrentDataStore(ConcurrentDataStoreBase):
dbtype = db.DB_BTREE
writers = 2
readers = 10
records = 1000
class HashConcurrentDataStore(ConcurrentDataStoreBase):
dbtype = db.DB_HASH
writers = 2
readers = 10
records = 1000
#----------------------------------------------------------------------
class SimpleThreadedBase(BaseThreadedTestCase):
dbopenflags = db.DB_THREAD
envflags = db.DB_THREAD | db.DB_INIT_MPOOL | db.DB_INIT_LOCK
readers = 10
writers = 2
records = 1000
def setEnvOpts(self):
self.env.set_lk_detect(db.DB_LOCK_DEFAULT)
def test02_SimpleLocks(self):
if verbose:
print '\n', '-=' * 30
print "Running %s.test02_SimpleLocks..." % self.__class__.__name__
keys=range(self.records)
import random
random.shuffle(keys)
records_per_writer=self.records//self.writers
readers_per_writer=self.readers//self.writers
self.assertEqual(self.records,self.writers*records_per_writer)
self.assertEqual(self.readers,self.writers*readers_per_writer)
self.assertTrue((records_per_writer%readers_per_writer)==0)
readers = []
for x in xrange(self.readers):
rt = Thread(target = self.readerThread,
args = (self.d, x),
name = 'reader %d' % x,
)#verbose = verbose)
if sys.version_info[0] < 3 :
rt.setDaemon(True)
else :
rt.daemon = True
readers.append(rt)
writers = []
for x in xrange(self.writers):
a=keys[records_per_writer*x:records_per_writer*(x+1)]
a.sort() # Generate conflicts
b=readers[readers_per_writer*x:readers_per_writer*(x+1)]
wt = Thread(target = self.writerThread,
args = (self.d, a, b),
name = 'writer %d' % x,
)#verbose = verbose)
writers.append(wt)
for t in writers:
if sys.version_info[0] < 3 :
t.setDaemon(True)
else :
t.daemon = True
t.start()
for t in writers:
t.join()
for t in readers:
t.join()
def writerThread(self, d, keys, readers):
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
if verbose:
print "%s: creating records %d - %d" % (name, start, stop)
count=len(keys)//len(readers)
count2=count
for x in keys :
key = '%04d' % x
dbutils.DeadlockWrap(d.put, key, self.makeData(key),
max_retries=12)
if verbose and x % 100 == 0:
print "%s: records %d - %d finished" % (name, start, x)
count2-=1
if not count2 :
readers.pop().start()
count2=count
if verbose:
print "%s: thread finished" % name
def readerThread(self, d, readerNum):
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
c = d.cursor()
count = 0
rec = dbutils.DeadlockWrap(c.first, max_retries=10)
while rec:
count += 1
key, data = rec
self.assertEqual(self.makeData(key), data)
rec = dbutils.DeadlockWrap(c.next, max_retries=10)
if verbose:
print "%s: found %d records" % (name, count)
c.close()
if verbose:
print "%s: thread finished" % name
class BTreeSimpleThreaded(SimpleThreadedBase):
dbtype = db.DB_BTREE
class HashSimpleThreaded(SimpleThreadedBase):
dbtype = db.DB_HASH
#----------------------------------------------------------------------
class ThreadedTransactionsBase(BaseThreadedTestCase):
dbopenflags = db.DB_THREAD | db.DB_AUTO_COMMIT
envflags = (db.DB_THREAD |
db.DB_INIT_MPOOL |
db.DB_INIT_LOCK |
db.DB_INIT_LOG |
db.DB_INIT_TXN
)
readers = 0
writers = 0
records = 2000
txnFlag = 0
def setEnvOpts(self):
#self.env.set_lk_detect(db.DB_LOCK_DEFAULT)
pass
def test03_ThreadedTransactions(self):
if verbose:
print '\n', '-=' * 30
print "Running %s.test03_ThreadedTransactions..." % \
self.__class__.__name__
keys=range(self.records)
import random
random.shuffle(keys)
records_per_writer=self.records//self.writers
readers_per_writer=self.readers//self.writers
self.assertEqual(self.records,self.writers*records_per_writer)
self.assertEqual(self.readers,self.writers*readers_per_writer)
self.assertTrue((records_per_writer%readers_per_writer)==0)
readers=[]
for x in xrange(self.readers):
rt = Thread(target = self.readerThread,
args = (self.d, x),
name = 'reader %d' % x,
)#verbose = verbose)
if sys.version_info[0] < 3 :
rt.setDaemon(True)
else :
rt.daemon = True
readers.append(rt)
writers = []
for x in xrange(self.writers):
a=keys[records_per_writer*x:records_per_writer*(x+1)]
b=readers[readers_per_writer*x:readers_per_writer*(x+1)]
wt = Thread(target = self.writerThread,
args = (self.d, a, b),
name = 'writer %d' % x,
)#verbose = verbose)
writers.append(wt)
dt = Thread(target = self.deadlockThread)
if sys.version_info[0] < 3 :
dt.setDaemon(True)
else :
dt.daemon = True
dt.start()
for t in writers:
if sys.version_info[0] < 3 :
t.setDaemon(True)
else :
t.daemon = True
t.start()
for t in writers:
t.join()
for t in readers:
t.join()
self.doLockDetect = False
dt.join()
def writerThread(self, d, keys, readers):
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
count=len(keys)//len(readers)
while len(keys):
try:
txn = self.env.txn_begin(None, self.txnFlag)
keys2=keys[:count]
for x in keys2 :
key = '%04d' % x
d.put(key, self.makeData(key), txn)
if verbose and x % 100 == 0:
print "%s: records %d - %d finished" % (name, start, x)
txn.commit()
keys=keys[count:]
readers.pop().start()
except (db.DBLockDeadlockError, db.DBLockNotGrantedError), val:
if verbose:
if sys.version_info < (2, 6) :
print "%s: Aborting transaction (%s)" % (name, val[1])
else :
print "%s: Aborting transaction (%s)" % (name,
val.args[1])
txn.abort()
if verbose:
print "%s: thread finished" % name
def readerThread(self, d, readerNum):
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
finished = False
while not finished:
try:
txn = self.env.txn_begin(None, self.txnFlag)
c = d.cursor(txn)
count = 0
rec = c.first()
while rec:
count += 1
key, data = rec
self.assertEqual(self.makeData(key), data)
rec = c.next()
if verbose: print "%s: found %d records" % (name, count)
c.close()
txn.commit()
finished = True
except (db.DBLockDeadlockError, db.DBLockNotGrantedError), val:
if verbose:
if sys.version_info < (2, 6) :
print "%s: Aborting transaction (%s)" % (name, val[1])
else :
print "%s: Aborting transaction (%s)" % (name,
val.args[1])
c.close()
txn.abort()
if verbose:
print "%s: thread finished" % name
def deadlockThread(self):
self.doLockDetect = True
while self.doLockDetect:
time.sleep(0.05)
try:
aborted = self.env.lock_detect(
db.DB_LOCK_RANDOM, db.DB_LOCK_CONFLICT)
if verbose and aborted:
print "deadlock: Aborted %d deadlocked transaction(s)" \
% aborted
except db.DBError:
pass
class BTreeThreadedTransactions(ThreadedTransactionsBase):
dbtype = db.DB_BTREE
writers = 2
readers = 10
records = 1000
class HashThreadedTransactions(ThreadedTransactionsBase):
dbtype = db.DB_HASH
writers = 2
readers = 10
records = 1000
class BTreeThreadedNoWaitTransactions(ThreadedTransactionsBase):
dbtype = db.DB_BTREE
writers = 2
readers = 10
records = 1000
txnFlag = db.DB_TXN_NOWAIT
class HashThreadedNoWaitTransactions(ThreadedTransactionsBase):
dbtype = db.DB_HASH
writers = 2
readers = 10
records = 1000
txnFlag = db.DB_TXN_NOWAIT
#----------------------------------------------------------------------
def test_suite():
suite = unittest.TestSuite()
if have_threads:
suite.addTest(unittest.makeSuite(BTreeConcurrentDataStore))
suite.addTest(unittest.makeSuite(HashConcurrentDataStore))
suite.addTest(unittest.makeSuite(BTreeSimpleThreaded))
suite.addTest(unittest.makeSuite(HashSimpleThreaded))
suite.addTest(unittest.makeSuite(BTreeThreadedTransactions))
suite.addTest(unittest.makeSuite(HashThreadedTransactions))
suite.addTest(unittest.makeSuite(BTreeThreadedNoWaitTransactions))
suite.addTest(unittest.makeSuite(HashThreadedNoWaitTransactions))
else:
print "Threads not available, skipping thread tests."
return suite
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
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