1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
# Copyright 2013 OpenStack Foundation
# Copyright 2013 Rackspace Hosting
# Copyright 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
"""
Simulates time itself to make the fake mode tests run even faster.
"""
from trove.openstack.common import log as logging
LOG = logging.getLogger(__name__)
pending_events = []
sleep_entrance_count = 0
def event_simulator_spawn_after(time_from_now_in_seconds, func, *args, **kw):
"""Fakes events without doing any actual waiting."""
def __cb():
func(*args, **kw)
pending_events.append({"time": time_from_now_in_seconds, "func": __cb})
def event_simulator_spawn(func, *args, **kw):
event_simulator_spawn_after(0, func, *args, **kw)
def event_simulator_sleep(time_to_sleep):
"""Simulates waiting for an event."""
global sleep_entrance_count
sleep_entrance_count += 1
time_to_sleep = float(time_to_sleep)
global pending_events
run_once = False # Ensure simulator runs even if the sleep time is zero.
while not run_once or time_to_sleep > 0:
run_once = True
itr_sleep = 0.5
for i in range(len(pending_events)):
event = pending_events[i]
event["time"] = event["time"] - itr_sleep
if event["func"] is not None and event["time"] < 0:
# Call event, but first delete it so this function can be
# reentrant.
func = event["func"]
event["func"] = None
try:
func()
except Exception:
LOG.exception("Simulated event error.")
time_to_sleep -= itr_sleep
sleep_entrance_count -= 1
if sleep_entrance_count < 1:
# Clear out old events
pending_events = [event for event in pending_events
if event["func"] is not None]
def monkey_patch():
import time
time.sleep = event_simulator_sleep
import eventlet
from eventlet import greenthread
eventlet.sleep = event_simulator_sleep
greenthread.sleep = event_simulator_sleep
eventlet.spawn_after = event_simulator_spawn_after
eventlet.spawn_n = event_simulator_spawn
eventlet.spawn = NotImplementedError
|
