|
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
|
|
|
# pylint: disable=assignment-from-none |
|
16
|
|
|
|
|
17
|
|
|
# XXX: This file has a lot of duplication with TriggerWatcher. |
|
18
|
|
|
# XXX: Refactor. |
|
19
|
|
|
|
|
20
|
|
|
import eventlet |
|
21
|
|
|
from kombu.mixins import ConsumerMixin |
|
22
|
|
|
from kombu import Connection |
|
23
|
|
|
|
|
24
|
|
|
from st2common import log as logging |
|
25
|
|
|
from st2common.transport import reactor, publishers |
|
26
|
|
|
from st2common.transport import utils as transport_utils |
|
27
|
|
|
import st2common.util.queues as queue_utils |
|
28
|
|
|
|
|
29
|
|
|
LOG = logging.getLogger(__name__) |
|
30
|
|
|
|
|
31
|
|
|
|
|
32
|
|
|
class SensorWatcher(ConsumerMixin): |
|
33
|
|
|
|
|
34
|
|
|
def __init__(self, create_handler, update_handler, delete_handler, |
|
35
|
|
|
queue_suffix=None): |
|
36
|
|
|
""" |
|
37
|
|
|
:param create_handler: Function which is called on SensorDB create event. |
|
38
|
|
|
:type create_handler: ``callable`` |
|
39
|
|
|
|
|
40
|
|
|
:param update_handler: Function which is called on SensorDB update event. |
|
41
|
|
|
:type update_handler: ``callable`` |
|
42
|
|
|
|
|
43
|
|
|
:param delete_handler: Function which is called on SensorDB delete event. |
|
44
|
|
|
:type delete_handler: ``callable`` |
|
45
|
|
|
""" |
|
46
|
|
|
# TODO: Handle sensor type filtering using routing key |
|
47
|
|
|
self._create_handler = create_handler |
|
48
|
|
|
self._update_handler = update_handler |
|
49
|
|
|
self._delete_handler = delete_handler |
|
50
|
|
|
self._sensor_watcher_q = self._get_queue(queue_suffix) |
|
51
|
|
|
|
|
52
|
|
|
self.connection = None |
|
53
|
|
|
self._updates_thread = None |
|
54
|
|
|
|
|
55
|
|
|
self._handlers = { |
|
56
|
|
|
publishers.CREATE_RK: create_handler, |
|
57
|
|
|
publishers.UPDATE_RK: update_handler, |
|
58
|
|
|
publishers.DELETE_RK: delete_handler |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
def get_consumers(self, Consumer, channel): |
|
62
|
|
|
consumers = [Consumer(queues=[self._sensor_watcher_q], |
|
63
|
|
|
accept=['pickle'], |
|
64
|
|
|
callbacks=[self.process_task])] |
|
65
|
|
|
return consumers |
|
66
|
|
|
|
|
67
|
|
|
def process_task(self, body, message): |
|
68
|
|
|
LOG.debug('process_task') |
|
69
|
|
|
LOG.debug(' body: %s', body) |
|
70
|
|
|
LOG.debug(' message.properties: %s', message.properties) |
|
71
|
|
|
LOG.debug(' message.delivery_info: %s', message.delivery_info) |
|
72
|
|
|
|
|
73
|
|
|
routing_key = message.delivery_info.get('routing_key', '') |
|
74
|
|
|
handler = self._handlers.get(routing_key, None) |
|
75
|
|
|
|
|
76
|
|
|
try: |
|
77
|
|
|
if not handler: |
|
78
|
|
|
LOG.info('Skipping message %s as no handler was found.', message) |
|
79
|
|
|
return |
|
80
|
|
|
|
|
81
|
|
|
try: |
|
82
|
|
|
handler(body) |
|
83
|
|
|
except Exception as e: |
|
84
|
|
|
LOG.exception('Handling failed. Message body: %s. Exception: %s', |
|
85
|
|
|
body, e.message) |
|
86
|
|
|
finally: |
|
87
|
|
|
message.ack() |
|
88
|
|
|
|
|
89
|
|
|
def start(self): |
|
90
|
|
|
try: |
|
91
|
|
|
self.connection = Connection(transport_utils.get_messaging_urls()) |
|
92
|
|
|
self._updates_thread = eventlet.spawn(self.run) |
|
93
|
|
|
except: |
|
94
|
|
|
LOG.exception('Failed to start sensor_watcher.') |
|
95
|
|
|
self.connection.release() |
|
96
|
|
|
|
|
97
|
|
|
def stop(self): |
|
98
|
|
|
LOG.debug('Shutting down sensor watcher.') |
|
99
|
|
|
try: |
|
100
|
|
|
if self._updates_thread: |
|
101
|
|
|
self._updates_thread = eventlet.kill(self._updates_thread) |
|
102
|
|
|
|
|
103
|
|
|
if self.connection: |
|
104
|
|
|
channel = self.connection.channel() |
|
105
|
|
|
bound_sensor_watch_q = self._sensor_watcher_q(channel) |
|
106
|
|
|
try: |
|
107
|
|
|
bound_sensor_watch_q.delete() |
|
108
|
|
|
except: |
|
109
|
|
|
LOG.error('Unable to delete sensor watcher queue: %s', self._sensor_watcher_q) |
|
110
|
|
|
finally: |
|
111
|
|
|
if self.connection: |
|
112
|
|
|
self.connection.release() |
|
113
|
|
|
|
|
114
|
|
|
@staticmethod |
|
115
|
|
|
def _get_queue(queue_suffix): |
|
116
|
|
|
queue_name = queue_utils.get_queue_name(queue_name_base='st2.sensor.watch', |
|
117
|
|
|
queue_name_suffix=queue_suffix, |
|
118
|
|
|
add_random_uuid_to_suffix=True |
|
119
|
|
|
) |
|
120
|
|
|
return reactor.get_sensor_cud_queue(queue_name, routing_key='#') |
|
121
|
|
|
|
StackStorm /
st2
