def writerThread(self, d, howMany, writerNum):
name = currentThread().getName()
start = howMany * writerNum
stop = howMany * (writerNum + 1) - 1
if verbose:
print "%s: creating records %d - %d" % (name, start, stop)
# create a bunch of records
for x in xrange(start, stop):
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)
# do a bit or reading too
if random() <= 0.05:
for y in xrange(start, x):
key = '%04d' % x
data = dbutils.DeadlockWrap(d.get, key, max_retries=12)
self.assertEqual(data, self.makeData(key))
# flush them
try:
dbutils.DeadlockWrap(d.sync, max_retries=12)
except db.DBIncompleteError, val:
if verbose:
print "could not complete sync()..."
def writerThread(self, d, howMany, writerNum):
#time.sleep(0.01 * writerNum + 0.01)
name = currentThread().getName()
start = howMany * writerNum
stop = howMany * (writerNum + 1) - 1
if verbose:
print "%s: creating records %d - %d" % (name, start, stop)
for x in range(start, stop):
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)
if verbose:
print "%s: finished creating records" % name
## # Each write-cursor will be exclusive, the only one that can update the DB...
## if verbose: print "%s: deleting a few records" % name
## c = d.cursor(flags = db.DB_WRITECURSOR)
## for x in range(10):
## key = int(random() * howMany) + start
## key = '%04d' % key
## if d.has_key(key):
## c.set(key)
## c.delete()
## c.close()
if verbose:
print "%s: thread finished" % name
def readerThread(self, d, readerNum):
time.sleep(0.01 * readerNum)
name = currentThread().getName()
for loop in range(5):
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()
time.sleep(0.05)
if verbose:
print "%s: thread finished" % name
class SimpleThreadedBase(BaseThreadedTestCase):
dbopenflags = db.DB_THREAD
envflags = db.DB_THREAD | db.DB_INIT_MPOOL | db.DB_INIT_LOCK
readers = 5
writers = 3
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__
threads = []
for x in range(self.writers):
wt = Thread(
target=self.writerThread,
args=(self.d, self.records, x),
name='writer %d' % x,
) #verbose = verbose)
threads.append(wt)
for x in range(self.readers):
rt = Thread(
target=self.readerThread,
args=(self.d, x),
name='reader %d' % x,
) #verbose = verbose)
threads.append(rt)
for t in threads:
t.start()
for t in threads:
t.join()
def writerThread(self, d, howMany, writerNum):
name = currentThread().getName()
start = howMany * writerNum
stop = howMany * (writerNum + 1) - 1
if verbose:
print "%s: creating records %d - %d" % (name, start, stop)
# create a bunch of records
for x in xrange(start, stop):
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)
# do a bit or reading too
if random() <= 0.05:
for y in xrange(start, x):
key = '%04d' % x
data = dbutils.DeadlockWrap(d.get, key, max_retries=12)
self.assertEqual(data, self.makeData(key))
# flush them
try:
dbutils.DeadlockWrap(d.sync, max_retries=12)
except db.DBIncompleteError, val:
if verbose:
print "could not complete sync()..."
# read them back, deleting a few
for x in xrange(start, stop):
key = '%04d' % x
data = dbutils.DeadlockWrap(d.get, key, max_retries=12)
if verbose and x % 100 == 0:
print "%s: fetched record (%s, %s)" % (name, key, data)
self.assertEqual(data, self.makeData(key))
if random() <= 0.10:
dbutils.DeadlockWrap(d.delete, key, max_retries=12)
if verbose:
print "%s: deleted record %s" % (name, key)
if verbose:
print "%s: thread finished" % name