|
1
|
|
|
# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
|
2
|
|
|
# contributor license agreements. See the NOTICE file distributed with |
|
3
|
|
|
# this work for additional information regarding copyright ownership. |
|
4
|
|
|
# The ASF licenses this file to You under the Apache License, Version 2.0 |
|
5
|
|
|
# (the "License"); you may not use this file except in compliance with |
|
6
|
|
|
# the License. You may obtain a copy of the License at |
|
7
|
|
|
# |
|
8
|
|
|
# http://www.apache.org/licenses/LICENSE-2.0 |
|
9
|
|
|
# |
|
10
|
|
|
# Unless required by applicable law or agreed to in writing, software |
|
11
|
|
|
# distributed under the License is distributed on an "AS IS" BASIS, |
|
12
|
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
13
|
|
|
# See the License for the specific language governing permissions and |
|
14
|
|
|
# limitations under the License. |
|
15
|
|
|
|
|
16
|
|
|
import os |
|
17
|
|
|
import sys |
|
18
|
|
|
|
|
19
|
|
|
import eventlet |
|
20
|
|
|
from oslo_config import cfg |
|
21
|
|
|
from eventlet import wsgi |
|
22
|
|
|
|
|
23
|
|
|
from st2common import log as logging |
|
24
|
|
|
from st2common.service_setup import setup as common_setup |
|
25
|
|
|
from st2common.service_setup import teardown as common_teardown |
|
26
|
|
|
from st2common.util.wsgi import shutdown_server_kill_pending_requests |
|
27
|
|
|
from st2stream.signal_handlers import register_stream_signal_handlers |
|
28
|
|
|
from st2stream.listener import get_listener_if_set |
|
29
|
|
|
from st2stream import config |
|
30
|
|
|
config.register_opts() |
|
31
|
|
|
from st2stream import app |
|
32
|
|
|
|
|
33
|
|
|
__all__ = [ |
|
34
|
|
|
'main' |
|
35
|
|
|
] |
|
36
|
|
|
|
|
37
|
|
|
|
|
38
|
|
|
eventlet.monkey_patch( |
|
39
|
|
|
os=True, |
|
40
|
|
|
select=True, |
|
41
|
|
|
socket=True, |
|
42
|
|
|
thread=False if '--use-debugger' in sys.argv else True, |
|
43
|
|
|
time=True) |
|
44
|
|
|
|
|
45
|
|
|
LOG = logging.getLogger(__name__) |
|
46
|
|
|
|
|
47
|
|
|
# How much time to give to the request in progress to finish in seconds before killing them |
|
48
|
|
|
WSGI_SERVER_REQUEST_SHUTDOWN_TIME = 2 |
|
49
|
|
|
|
|
50
|
|
|
|
|
51
|
|
|
def _setup(): |
|
52
|
|
|
common_setup(service='stream', config=config, setup_db=True, register_mq_exchanges=True, |
|
53
|
|
|
register_signal_handlers=True, register_internal_trigger_types=False, |
|
54
|
|
|
run_migrations=False) |
|
55
|
|
|
|
|
56
|
|
|
|
|
57
|
|
|
def _run_server(): |
|
58
|
|
|
host = cfg.CONF.stream.host |
|
59
|
|
|
port = cfg.CONF.stream.port |
|
60
|
|
|
|
|
61
|
|
|
LOG.info('(PID=%s) ST2 Stream API is serving on http://%s:%s.', os.getpid(), host, port) |
|
62
|
|
|
|
|
63
|
|
|
max_pool_size = eventlet.wsgi.DEFAULT_MAX_SIMULTANEOUS_REQUESTS |
|
64
|
|
|
worker_pool = eventlet.GreenPool(max_pool_size) |
|
65
|
|
|
sock = eventlet.listen((host, port)) |
|
66
|
|
|
|
|
67
|
|
|
def queue_shutdown(signal_number, stack_frame): |
|
68
|
|
|
eventlet.spawn_n(shutdown_server_kill_pending_requests, sock=sock, |
|
69
|
|
|
worker_pool=worker_pool, wait_time=WSGI_SERVER_REQUEST_SHUTDOWN_TIME) |
|
70
|
|
|
|
|
71
|
|
|
# We register a custom SIGINT handler which allows us to kill long running active requests. |
|
72
|
|
|
# Note: Eventually we will support draining (waiting for short-running requests), but we |
|
73
|
|
|
# will still want to kill long running stream requests. |
|
74
|
|
|
register_stream_signal_handlers(handler_func=queue_shutdown) |
|
75
|
|
|
|
|
76
|
|
|
wsgi.server(sock, app.setup_app(), custom_pool=worker_pool) |
|
77
|
|
|
return 0 |
|
78
|
|
|
|
|
79
|
|
|
|
|
80
|
|
|
def _teardown(): |
|
81
|
|
|
common_teardown() |
|
82
|
|
|
|
|
83
|
|
|
|
|
84
|
|
|
def main(): |
|
85
|
|
|
try: |
|
86
|
|
|
_setup() |
|
87
|
|
|
return _run_server() |
|
88
|
|
|
except SystemExit as exit_code: |
|
89
|
|
|
sys.exit(exit_code) |
|
90
|
|
|
except KeyboardInterrupt: |
|
91
|
|
|
listener = get_listener_if_set() |
|
92
|
|
|
|
|
93
|
|
|
if listener: |
|
94
|
|
|
listener.shutdown() |
|
95
|
|
|
except Exception: |
|
96
|
|
|
LOG.exception('(PID=%s) ST2 Stream API quit due to exception.', os.getpid()) |
|
97
|
|
|
return 1 |
|
98
|
|
|
finally: |
|
99
|
|
|
_teardown() |
|
100
|
|
|
|
Plexxi /
st2
