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c5a11fabdb
This patch publishes the work done until now for Python 3.0 compatibility. Still a lot to be done. When possible, we use 3.0 features in Python 2.6, easing development and testing, and exposing internal changes to a wider audience, for better test coverage. Some mode details: http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.2
481 lines
14 KiB
Python
481 lines
14 KiB
Python
"""TestCases for multi-threaded access to a DB.
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"""
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import os
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import sys
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import time
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import errno
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from random import random
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DASH = '-'
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try:
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WindowsError
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except NameError:
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class WindowsError(Exception):
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pass
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import unittest
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from test_all import verbose, have_threads, get_new_environment_path, get_new_database_path
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if have_threads :
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from threading import Thread, currentThread
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try:
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# For Pythons w/distutils pybsddb
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from bsddb3 import db, dbutils
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except ImportError:
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# For Python 2.3
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from bsddb import db, dbutils
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try:
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from bsddb3 import test_support
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except ImportError:
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from test import test_support
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#----------------------------------------------------------------------
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class BaseThreadedTestCase(unittest.TestCase):
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dbtype = db.DB_UNKNOWN # must be set in derived class
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dbopenflags = 0
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dbsetflags = 0
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envflags = 0
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import sys
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if sys.version_info[:3] < (2, 4, 0):
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def assertTrue(self, expr, msg=None):
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self.failUnless(expr,msg=msg)
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def setUp(self):
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if verbose:
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dbutils._deadlock_VerboseFile = sys.stdout
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self.homeDir = get_new_environment_path()
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self.env = db.DBEnv()
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self.setEnvOpts()
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self.env.open(self.homeDir, self.envflags | db.DB_CREATE)
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self.filename = self.__class__.__name__ + '.db'
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self.d = db.DB(self.env)
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if self.dbsetflags:
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self.d.set_flags(self.dbsetflags)
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self.d.open(self.filename, self.dbtype, self.dbopenflags|db.DB_CREATE)
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def tearDown(self):
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self.d.close()
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self.env.close()
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test_support.rmtree(self.homeDir)
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def setEnvOpts(self):
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pass
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def makeData(self, key):
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return DASH.join([key] * 5)
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#----------------------------------------------------------------------
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class ConcurrentDataStoreBase(BaseThreadedTestCase):
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dbopenflags = db.DB_THREAD
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envflags = db.DB_THREAD | db.DB_INIT_CDB | db.DB_INIT_MPOOL
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readers = 0 # derived class should set
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writers = 0
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records = 1000
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def test01_1WriterMultiReaders(self):
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if verbose:
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print '\n', '-=' * 30
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print "Running %s.test01_1WriterMultiReaders..." % \
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self.__class__.__name__
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keys=range(self.records)
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import random
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random.shuffle(keys)
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records_per_writer=self.records//self.writers
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readers_per_writer=self.readers//self.writers
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self.assertEqual(self.records,self.writers*records_per_writer)
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self.assertEqual(self.readers,self.writers*readers_per_writer)
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self.assertTrue((records_per_writer%readers_per_writer)==0)
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readers = []
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for x in xrange(self.readers):
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rt = Thread(target = self.readerThread,
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args = (self.d, x),
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name = 'reader %d' % x,
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)#verbose = verbose)
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rt.setDaemon(True)
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readers.append(rt)
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writers=[]
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for x in xrange(self.writers):
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a=keys[records_per_writer*x:records_per_writer*(x+1)]
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a.sort() # Generate conflicts
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b=readers[readers_per_writer*x:readers_per_writer*(x+1)]
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wt = Thread(target = self.writerThread,
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args = (self.d, a, b),
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name = 'writer %d' % x,
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)#verbose = verbose)
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writers.append(wt)
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for t in writers:
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t.setDaemon(True)
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t.start()
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for t in writers:
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t.join()
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for t in readers:
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t.join()
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def writerThread(self, d, keys, readers):
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name = currentThread().getName()
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if verbose:
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print "%s: creating records %d - %d" % (name, start, stop)
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count=len(keys)//len(readers)
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count2=count
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for x in keys :
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key = '%04d' % x
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dbutils.DeadlockWrap(d.put, key, self.makeData(key),
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max_retries=12)
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if verbose and x % 100 == 0:
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print "%s: records %d - %d finished" % (name, start, x)
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count2-=1
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if not count2 :
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readers.pop().start()
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count2=count
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if verbose:
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print "%s: finished creating records" % name
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if verbose:
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print "%s: thread finished" % name
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def readerThread(self, d, readerNum):
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name = currentThread().getName()
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for i in xrange(5) :
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c = d.cursor()
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count = 0
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rec = c.first()
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while rec:
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count += 1
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key, data = rec
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self.assertEqual(self.makeData(key), data)
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rec = c.next()
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if verbose:
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print "%s: found %d records" % (name, count)
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c.close()
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if verbose:
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print "%s: thread finished" % name
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class BTreeConcurrentDataStore(ConcurrentDataStoreBase):
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dbtype = db.DB_BTREE
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writers = 2
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readers = 10
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records = 1000
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class HashConcurrentDataStore(ConcurrentDataStoreBase):
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dbtype = db.DB_HASH
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writers = 2
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readers = 10
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records = 1000
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#----------------------------------------------------------------------
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class SimpleThreadedBase(BaseThreadedTestCase):
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dbopenflags = db.DB_THREAD
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envflags = db.DB_THREAD | db.DB_INIT_MPOOL | db.DB_INIT_LOCK
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readers = 10
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writers = 2
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records = 1000
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def setEnvOpts(self):
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self.env.set_lk_detect(db.DB_LOCK_DEFAULT)
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def test02_SimpleLocks(self):
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if verbose:
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print '\n', '-=' * 30
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print "Running %s.test02_SimpleLocks..." % self.__class__.__name__
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keys=range(self.records)
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import random
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random.shuffle(keys)
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records_per_writer=self.records//self.writers
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readers_per_writer=self.readers//self.writers
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self.assertEqual(self.records,self.writers*records_per_writer)
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self.assertEqual(self.readers,self.writers*readers_per_writer)
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self.assertTrue((records_per_writer%readers_per_writer)==0)
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readers = []
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for x in xrange(self.readers):
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rt = Thread(target = self.readerThread,
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args = (self.d, x),
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name = 'reader %d' % x,
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)#verbose = verbose)
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rt.setDaemon(True)
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readers.append(rt)
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writers = []
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for x in xrange(self.writers):
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a=keys[records_per_writer*x:records_per_writer*(x+1)]
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a.sort() # Generate conflicts
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b=readers[readers_per_writer*x:readers_per_writer*(x+1)]
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wt = Thread(target = self.writerThread,
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args = (self.d, a, b),
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name = 'writer %d' % x,
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)#verbose = verbose)
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writers.append(wt)
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for t in writers:
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t.setDaemon(True)
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t.start()
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for t in writers:
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t.join()
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for t in readers:
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t.join()
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def writerThread(self, d, keys, readers):
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name = currentThread().getName()
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if verbose:
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print "%s: creating records %d - %d" % (name, start, stop)
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count=len(keys)//len(readers)
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count2=count
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for x in keys :
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key = '%04d' % x
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dbutils.DeadlockWrap(d.put, key, self.makeData(key),
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max_retries=12)
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if verbose and x % 100 == 0:
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print "%s: records %d - %d finished" % (name, start, x)
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count2-=1
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if not count2 :
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readers.pop().start()
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count2=count
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if verbose:
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print "%s: thread finished" % name
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def readerThread(self, d, readerNum):
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name = currentThread().getName()
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c = d.cursor()
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count = 0
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rec = dbutils.DeadlockWrap(c.first, max_retries=10)
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while rec:
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count += 1
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key, data = rec
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self.assertEqual(self.makeData(key), data)
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rec = dbutils.DeadlockWrap(c.next, max_retries=10)
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if verbose:
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print "%s: found %d records" % (name, count)
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c.close()
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if verbose:
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print "%s: thread finished" % name
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class BTreeSimpleThreaded(SimpleThreadedBase):
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dbtype = db.DB_BTREE
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class HashSimpleThreaded(SimpleThreadedBase):
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dbtype = db.DB_HASH
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#----------------------------------------------------------------------
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class ThreadedTransactionsBase(BaseThreadedTestCase):
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dbopenflags = db.DB_THREAD | db.DB_AUTO_COMMIT
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envflags = (db.DB_THREAD |
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db.DB_INIT_MPOOL |
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db.DB_INIT_LOCK |
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db.DB_INIT_LOG |
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db.DB_INIT_TXN
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)
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readers = 0
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writers = 0
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records = 2000
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txnFlag = 0
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def setEnvOpts(self):
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#self.env.set_lk_detect(db.DB_LOCK_DEFAULT)
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pass
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def test03_ThreadedTransactions(self):
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if verbose:
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print '\n', '-=' * 30
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print "Running %s.test03_ThreadedTransactions..." % \
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self.__class__.__name__
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keys=range(self.records)
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import random
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random.shuffle(keys)
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records_per_writer=self.records//self.writers
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readers_per_writer=self.readers//self.writers
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self.assertEqual(self.records,self.writers*records_per_writer)
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self.assertEqual(self.readers,self.writers*readers_per_writer)
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self.assertTrue((records_per_writer%readers_per_writer)==0)
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readers=[]
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for x in xrange(self.readers):
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rt = Thread(target = self.readerThread,
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args = (self.d, x),
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name = 'reader %d' % x,
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)#verbose = verbose)
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rt.setDaemon(True)
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readers.append(rt)
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writers = []
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for x in xrange(self.writers):
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a=keys[records_per_writer*x:records_per_writer*(x+1)]
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b=readers[readers_per_writer*x:readers_per_writer*(x+1)]
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wt = Thread(target = self.writerThread,
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args = (self.d, a, b),
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name = 'writer %d' % x,
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)#verbose = verbose)
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writers.append(wt)
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dt = Thread(target = self.deadlockThread)
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dt.setDaemon(True)
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dt.start()
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for t in writers:
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t.setDaemon(True)
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t.start()
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for t in writers:
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t.join()
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for t in readers:
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t.join()
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self.doLockDetect = False
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dt.join()
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def writerThread(self, d, keys, readers):
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name = currentThread().getName()
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count=len(keys)//len(readers)
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while len(keys):
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try:
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txn = self.env.txn_begin(None, self.txnFlag)
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keys2=keys[:count]
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for x in keys2 :
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key = '%04d' % x
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d.put(key, self.makeData(key), txn)
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if verbose and x % 100 == 0:
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print "%s: records %d - %d finished" % (name, start, x)
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txn.commit()
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keys=keys[count:]
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readers.pop().start()
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except (db.DBLockDeadlockError, db.DBLockNotGrantedError), val:
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if verbose:
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print "%s: Aborting transaction (%s)" % (name, val[1])
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txn.abort()
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if verbose:
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print "%s: thread finished" % name
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def readerThread(self, d, readerNum):
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name = currentThread().getName()
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finished = False
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while not finished:
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try:
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txn = self.env.txn_begin(None, self.txnFlag)
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c = d.cursor(txn)
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count = 0
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rec = c.first()
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while rec:
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count += 1
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key, data = rec
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self.assertEqual(self.makeData(key), data)
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rec = c.next()
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if verbose: print "%s: found %d records" % (name, count)
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c.close()
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txn.commit()
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finished = True
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except (db.DBLockDeadlockError, db.DBLockNotGrantedError), val:
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if verbose:
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print "%s: Aborting transaction (%s)" % (name, val[1])
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c.close()
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txn.abort()
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if verbose:
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print "%s: thread finished" % name
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def deadlockThread(self):
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self.doLockDetect = True
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while self.doLockDetect:
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time.sleep(0.05)
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try:
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aborted = self.env.lock_detect(
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db.DB_LOCK_RANDOM, db.DB_LOCK_CONFLICT)
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if verbose and aborted:
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print "deadlock: Aborted %d deadlocked transaction(s)" \
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% aborted
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except db.DBError:
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pass
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class BTreeThreadedTransactions(ThreadedTransactionsBase):
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dbtype = db.DB_BTREE
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writers = 2
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readers = 10
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records = 1000
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class HashThreadedTransactions(ThreadedTransactionsBase):
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dbtype = db.DB_HASH
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writers = 2
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readers = 10
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records = 1000
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class BTreeThreadedNoWaitTransactions(ThreadedTransactionsBase):
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dbtype = db.DB_BTREE
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writers = 2
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readers = 10
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records = 1000
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txnFlag = db.DB_TXN_NOWAIT
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class HashThreadedNoWaitTransactions(ThreadedTransactionsBase):
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dbtype = db.DB_HASH
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writers = 2
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readers = 10
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records = 1000
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txnFlag = db.DB_TXN_NOWAIT
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#----------------------------------------------------------------------
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def test_suite():
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suite = unittest.TestSuite()
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if have_threads:
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suite.addTest(unittest.makeSuite(BTreeConcurrentDataStore))
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suite.addTest(unittest.makeSuite(HashConcurrentDataStore))
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suite.addTest(unittest.makeSuite(BTreeSimpleThreaded))
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suite.addTest(unittest.makeSuite(HashSimpleThreaded))
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suite.addTest(unittest.makeSuite(BTreeThreadedTransactions))
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suite.addTest(unittest.makeSuite(HashThreadedTransactions))
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suite.addTest(unittest.makeSuite(BTreeThreadedNoWaitTransactions))
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suite.addTest(unittest.makeSuite(HashThreadedNoWaitTransactions))
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else:
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print "Threads not available, skipping thread tests."
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return suite
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if __name__ == '__main__':
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unittest.main(defaultTest='test_suite')
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