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import os
import random
import time
from beaker.container import *
from beaker.synchronization import _synchronizers
from beaker.cache import clsmap
from threading import Thread
class CachedWidget(object):
totalcreates = 0
delay = 0
def __init__(self):
CachedWidget.totalcreates += 1
time.sleep(CachedWidget.delay)
self.time = time.time()
def _run_container_test(cls, totaltime, expiretime, delay, threadlocal):
print "\ntesting %s for %d secs with expiretime %s delay %d" % (
cls, totaltime, expiretime, delay)
CachedWidget.totalcreates = 0
CachedWidget.delay = delay
# allow for python overhead when checking current time against expire times
fudge = 1
starttime = time.time()
running = [True]
class RunThread(Thread):
def run(self):
print "%s starting" % self
if threadlocal:
localvalue = Value(
'test',
cls('test', data_dir='./cache'),
createfunc=CachedWidget,
expiretime=expiretime,
starttime=starttime)
localvalue.clear_value()
else:
localvalue = value
try:
while running[0]:
item = localvalue.get_value()
if expiretime is not None:
currenttime = time.time()
itemtime = item.time
assert itemtime + expiretime + delay + fudge >= currenttime, \
"created: %f expire: %f delay: %f currenttime: %f" % \
(itemtime, expiretime, delay, currenttime)
time.sleep(random.random() * .00001)
except:
running[0] = False
raise
print "%s finishing" % self
if not threadlocal:
value = Value(
'test',
cls('test', data_dir='./cache'),
createfunc=CachedWidget,
expiretime=expiretime,
starttime=starttime)
value.clear_value()
else:
value = None
threads = [RunThread() for i in range(1, 8)]
for t in threads:
t.start()
time.sleep(totaltime)
failed = not running[0]
running[0] = False
for t in threads:
t.join()
assert not failed, "One or more threads failed"
if expiretime is None:
expected = 1
else:
expected = totaltime / expiretime + 1
assert CachedWidget.totalcreates <= expected, \
"Number of creates %d exceeds expected max %d" % (CachedWidget.totalcreates, expected)
def test_memory_container(totaltime=10, expiretime=None, delay=0, threadlocal=False):
_run_container_test(clsmap['memory'],
totaltime, expiretime, delay, threadlocal)
def test_dbm_container(totaltime=10, expiretime=None, delay=0):
_run_container_test(clsmap['dbm'], totaltime, expiretime, delay, False)
def test_file_container(totaltime=10, expiretime=None, delay=0, threadlocal=False):
_run_container_test(clsmap['file'], totaltime, expiretime, delay, threadlocal)
def test_memory_container_tlocal():
test_memory_container(expiretime=5, delay=2, threadlocal=True)
def test_memory_container_2():
test_memory_container(expiretime=2)
def test_memory_container_3():
test_memory_container(expiretime=5, delay=2)
def test_dbm_container_2():
test_dbm_container(expiretime=2)
def test_dbm_container_3():
test_dbm_container(expiretime=5, delay=2)
def test_file_container_2():
test_file_container(expiretime=2)
def test_file_container_3():
test_file_container(expiretime=5, delay=2)
def test_file_container_tlocal():
test_file_container(expiretime=5, delay=2, threadlocal=True)
def test_file_open_bug():
"""ensure errors raised during reads or writes don't lock the namespace open."""
value = Value('test', clsmap['file']('reentrant_test', data_dir='./cache'))
if os.path.exists(value.namespace.file):
os.remove(value.namespace.file)
value.set_value("x")
f = open(value.namespace.file, 'w')
f.write("BLAH BLAH BLAH")
f.close()
# TODO: do we have an assertRaises() in nose to use here ?
try:
value.set_value("y")
assert False
except:
pass
_synchronizers.clear()
value = Value('test', clsmap['file']('reentrant_test', data_dir='./cache'))
# TODO: do we have an assertRaises() in nose to use here ?
try:
value.set_value("z")
assert False
except:
pass
def test_removing_file_refreshes():
"""test that the cache doesn't ignore file removals"""
x = [0]
def create():
x[0] += 1
return x[0]
value = Value('test',
clsmap['file']('refresh_test', data_dir='./cache'),
createfunc=create, starttime=time.time()
)
if os.path.exists(value.namespace.file):
os.remove(value.namespace.file)
assert value.get_value() == 1
assert value.get_value() == 1
os.remove(value.namespace.file)
assert value.get_value() == 2
def teardown():
import shutil
shutil.rmtree('./cache', True)
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