|
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
|
|
|
from kombu import Connection |
|
17
|
|
|
|
|
18
|
|
|
from st2common import log as logging |
|
19
|
|
|
from st2common.constants.trace import TRACE_CONTEXT, TRACE_ID |
|
20
|
|
|
from st2common.util import date as date_utils |
|
21
|
|
|
from st2common.services import trace as trace_service |
|
22
|
|
|
from st2common.transport import consumers, reactor |
|
23
|
|
|
from st2common.transport import utils as transport_utils |
|
24
|
|
|
import st2reactor.container.utils as container_utils |
|
25
|
|
|
from st2reactor.rules.engine import RulesEngine |
|
26
|
|
|
|
|
27
|
|
|
|
|
28
|
|
|
LOG = logging.getLogger(__name__) |
|
29
|
|
|
|
|
30
|
|
|
RULESENGINE_WORK_Q = reactor.get_trigger_instances_queue( |
|
31
|
|
|
name='st2.trigger_instances_dispatch.rules_engine', routing_key='#') |
|
32
|
|
|
|
|
33
|
|
|
|
|
34
|
|
|
class TriggerInstanceDispatcher(consumers.StagedMessageHandler): |
|
35
|
|
|
message_type = dict |
|
36
|
|
|
|
|
37
|
|
|
def __init__(self, connection, queues): |
|
38
|
|
|
super(TriggerInstanceDispatcher, self).__init__(connection, queues) |
|
39
|
|
|
self.rules_engine = RulesEngine() |
|
40
|
|
|
|
|
41
|
|
|
def pre_ack_process(self, message): |
|
42
|
|
|
''' |
|
43
|
|
|
TriggerInstance from message is create prior to acknowledging the message. This |
|
44
|
|
|
gets us a way to not acknowledge messages. |
|
45
|
|
|
''' |
|
46
|
|
|
trigger = message['trigger'] |
|
47
|
|
|
payload = message['payload'] |
|
48
|
|
|
|
|
49
|
|
|
# Accomodate for not being able to create a TrigegrInstance if a TriggerDB |
|
50
|
|
|
# is not found. |
|
51
|
|
|
trigger_instance = container_utils.create_trigger_instance( |
|
52
|
|
|
trigger, |
|
53
|
|
|
payload or {}, |
|
54
|
|
|
date_utils.get_datetime_utc_now(), |
|
55
|
|
|
raise_on_no_trigger=True) |
|
56
|
|
|
# Use trace_context from the instance and if not found create a new context |
|
57
|
|
|
# and use the trigger_instance.id as trace_tag. |
|
58
|
|
|
trace_context = message.get(TRACE_CONTEXT, None) |
|
59
|
|
|
if not trace_context: |
|
60
|
|
|
trace_context = { |
|
61
|
|
|
TRACE_ID: 'trigger_instance-%s' % str(trigger_instance.id) |
|
62
|
|
|
} |
|
63
|
|
|
# add a trace or update an existing trace with trigger_instance |
|
64
|
|
|
trace_service.add_or_update_given_trace_context( |
|
65
|
|
|
trace_context=trace_context, |
|
66
|
|
|
trigger_instances=[ |
|
67
|
|
|
trace_service.get_trace_component_for_trigger_instance(trigger_instance) |
|
68
|
|
|
]) |
|
69
|
|
|
return trigger_instance |
|
70
|
|
|
|
|
71
|
|
|
def process(self, trigger_instance): |
|
72
|
|
|
if not trigger_instance: |
|
73
|
|
|
raise ValueError('No trigger_instance provided for processing.') |
|
74
|
|
|
try: |
|
75
|
|
|
|
|
76
|
|
|
self.rules_engine.handle_trigger_instance(trigger_instance) |
|
77
|
|
|
except: |
|
78
|
|
|
# This could be a large message but at least in case of an exception |
|
79
|
|
|
# we get to see more context. |
|
80
|
|
|
# Beyond this point code cannot really handle the exception anyway so |
|
81
|
|
|
# eating up the exception. |
|
82
|
|
|
LOG.exception('Failed to handle trigger_instance %s.', trigger_instance) |
|
83
|
|
|
return |
|
84
|
|
|
|
|
85
|
|
|
|
|
86
|
|
|
def get_worker(): |
|
87
|
|
|
with Connection(transport_utils.get_messaging_urls()) as conn: |
|
88
|
|
|
return TriggerInstanceDispatcher(conn, [RULESENGINE_WORK_Q]) |
|
89
|
|
|
|
StackStorm /
st2
