def test_haveReadLocks(self):
"""check if there is a ReadLock """
timeout = 2.0
write_lock = WriteLock(self.lock_dir, timeout)
read_lock = ReadLock(self.lock_dir)
# acquired ReadLock
assert read_lock.acquire(0.1)
result_before = write_lock._haveReadLocks()
assert result_before
# try to acquire WriteLock
assert write_lock.acquire()
result_after = write_lock._haveReadLocks()
assert not result_after
def inc_get_metas(request, args, handle=None):
pages, keys, _ = metatable_parseargs(request, args, get_all_keys=True)
current = dict()
for page in pages:
request.page = Page(request, page)
# metatable_parseargs checks read permissions, no need to do it again
metas = get_metas(request, page, keys, checkAccess=False)
current[page] = dict()
for key in keys:
values = set(metas[key])
current[page][key] = values
cachedir = os.path.join(request.cfg.cache_dir, "getmetas")
if not os.path.exists(cachedir):
os.makedirs(cachedir)
lock = WriteLock(cachedir, timeout=60.0)
success = lock.acquire()
path = os.path.join(cachedir, request.cfg.siteid + ".shelve")
db = shelve.open(path)
incremental = True
try:
if not handle or handle not in db:
incremental = False
handle = create_new_handle(db)
previous = db.get(handle, dict())
db[handle] = current
finally:
db.close()
if lock.isLocked():
lock.release()
return [incremental, handle, diff(previous, current)]
def test_writelock_acquire(self):
""" util.lock: WriteLock: acquire """
lock = WriteLock(self.lock_dir)
assert lock.acquire(0.1)
with pytest.raises(RuntimeError):
assert lock.acquire(0.1)
