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import contextlib
import unittest
from nose import SkipTest
from nose.tools import raises
from kazoo.client import KazooClient
from kazoo.handlers import utils
from kazoo.protocol import states as kazoo_states
from kazoo.tests import test_client
from kazoo.tests import test_lock
from kazoo.tests import util as test_util
try:
import eventlet
from eventlet.green import threading
from kazoo.handlers import eventlet as eventlet_handler
EVENTLET_HANDLER_AVAILABLE = True
except ImportError:
EVENTLET_HANDLER_AVAILABLE = False
@contextlib.contextmanager
def start_stop_one(handler=None):
if not handler:
handler = eventlet_handler.SequentialEventletHandler()
handler.start()
try:
yield handler
finally:
handler.stop()
class TestEventletHandler(unittest.TestCase):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
raise SkipTest('eventlet handler not available.')
super(TestEventletHandler, self).setUp()
def test_started(self):
with start_stop_one() as handler:
self.assertTrue(handler.running)
self.assertNotEqual(0, len(handler._workers))
self.assertFalse(handler.running)
self.assertEqual(0, len(handler._workers))
def test_spawn(self):
captures = []
def cb():
captures.append(1)
with start_stop_one() as handler:
handler.spawn(cb)
self.assertEqual(1, len(captures))
def test_dispatch(self):
captures = []
def cb():
captures.append(1)
with start_stop_one() as handler:
handler.dispatch_callback(kazoo_states.Callback('watch', cb, []))
self.assertEqual(1, len(captures))
def test_async_link(self):
captures = []
def cb(handler):
captures.append(handler)
with start_stop_one() as handler:
r = handler.async_result()
r.rawlink(cb)
r.set(2)
self.assertEqual(1, len(captures))
self.assertEqual(2, r.get())
def test_timeout_raising(self):
handler = eventlet_handler.SequentialEventletHandler()
@raises(handler.timeout_exception)
def raise_it():
raise handler.timeout_exception("This is a timeout")
raise_it()
def test_async_ok(self):
captures = []
def delayed():
captures.append(1)
return 1
def after_delayed(handler):
captures.append(handler)
with start_stop_one() as handler:
r = handler.async_result()
r.rawlink(after_delayed)
w = handler.spawn(utils.wrap(r)(delayed))
w.join()
self.assertEqual(2, len(captures))
self.assertEqual(1, captures[0])
self.assertEqual(1, r.get())
def test_get_with_no_block(self):
handler = eventlet_handler.SequentialEventletHandler()
@raises(handler.timeout_exception)
def test_no_block(r):
r.get(block=False)
with start_stop_one(handler):
r = handler.async_result()
test_no_block(r)
r.set(1)
self.assertEqual(1, r.get())
def test_async_exception(self):
@raises(IOError)
def check_exc(r):
r.get()
def broken():
raise IOError("Failed")
with start_stop_one() as handler:
r = handler.async_result()
w = handler.spawn(utils.wrap(r)(broken))
w.join()
self.assertFalse(r.successful())
check_exc(r)
class TestEventletClient(test_client.TestClient):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
raise SkipTest('eventlet handler not available.')
super(TestEventletClient, self).setUp()
@staticmethod
def make_event():
return threading.Event()
@staticmethod
def make_condition():
return threading.Condition()
def _makeOne(self, *args):
return eventlet_handler.SequentialEventletHandler(*args)
def _get_client(self, **kwargs):
kwargs["handler"] = self._makeOne()
return KazooClient(self.hosts, **kwargs)
class TestEventletSemaphore(test_lock.TestSemaphore):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
raise SkipTest('eventlet handler not available.')
super(TestEventletSemaphore, self).setUp()
@staticmethod
def make_condition():
return threading.Condition()
@staticmethod
def make_event():
return threading.Event()
@staticmethod
def make_thread(*args, **kwargs):
return threading.Thread(*args, **kwargs)
def _makeOne(self, *args):
return eventlet_handler.SequentialEventletHandler(*args)
def _get_client(self, **kwargs):
kwargs["handler"] = self._makeOne()
c = KazooClient(self.hosts, **kwargs)
try:
self._clients.append(c)
except AttributeError:
self._client = [c]
return c
class TestEventletLock(test_lock.KazooLockTests):
def setUp(self):
if not EVENTLET_HANDLER_AVAILABLE:
raise SkipTest('eventlet handler not available.')
super(TestEventletLock, self).setUp()
@staticmethod
def make_condition():
return threading.Condition()
@staticmethod
def make_event():
return threading.Event()
@staticmethod
def make_thread(*args, **kwargs):
return threading.Thread(*args, **kwargs)
@staticmethod
def make_wait():
return test_util.Wait(getsleep=(lambda: eventlet.sleep))
def _makeOne(self, *args):
return eventlet_handler.SequentialEventletHandler(*args)
def _get_client(self, **kwargs):
kwargs["handler"] = self._makeOne()
c = KazooClient(self.hosts, **kwargs)
try:
self._clients.append(c)
except AttributeError:
self._client = [c]
return c
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