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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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from st2common import log as logging |
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from st2common.constants.rules import RULE_TYPE_BACKSTOP |
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from st2reactor.rules.filter import RuleFilter, SecondPassRuleFilter |
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LOG = logging.getLogger('st2reactor.rules.RulesMatcher') |
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class RulesMatcher(object): |
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def __init__(self, trigger_instance, trigger, rules, extra_info=False): |
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self.trigger_instance = trigger_instance |
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self.trigger = trigger |
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self.rules = rules |
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self.extra_info = extra_info |
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def get_matching_rules(self): |
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first_pass, second_pass = self._split_rules_into_passes() |
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# first pass |
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rule_filters = [RuleFilter(trigger_instance=self.trigger_instance, |
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trigger=self.trigger, |
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rule=rule, |
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extra_info=self.extra_info) |
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for rule in first_pass] |
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matched_rules = [rule_filter.rule for rule_filter in rule_filters if rule_filter.filter()] |
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LOG.debug('[1st_pass] %d rule(s) found to enforce for %s.', len(matched_rules), |
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self.trigger['name']) |
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# second pass |
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rule_filters = [SecondPassRuleFilter(self.trigger_instance, self.trigger, rule, |
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matched_rules) |
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for rule in second_pass] |
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matched_in_second_pass = [rule_filter.rule for rule_filter in rule_filters |
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if rule_filter.filter()] |
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LOG.debug('[2nd_pass] %d rule(s) found to enforce for %s.', len(matched_in_second_pass), |
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self.trigger['name']) |
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matched_rules.extend(matched_in_second_pass) |
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LOG.info('%d rule(s) found to enforce for %s.', len(matched_rules), |
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self.trigger['name']) |
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return matched_rules |
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def _split_rules_into_passes(self): |
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""" |
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Splits the rules in the Matcher into first_pass and second_pass collections. |
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Since the |
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""" |
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first_pass = [] |
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second_pass = [] |
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for rule in self.rules: |
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if self._is_first_pass_rule(rule): |
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first_pass.append(rule) |
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else: |
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second_pass.append(rule) |
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return first_pass, second_pass |
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def _is_first_pass_rule(self, rule): |
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return rule.type['ref'] != RULE_TYPE_BACKSTOP |
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StackStorm /
st2
