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Support dynamically configure alarm settings (#3557)
* Support dynamically configure alarm settings * Update documentation
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107
...src/main/java/org/apache/skywalking/oap/server/core/alarm/provider/AlarmRulesWatcher.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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. | ||
| * | ||
| */ | ||
|
|
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| package org.apache.skywalking.oap.server.core.alarm.provider; | ||
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| import lombok.Getter; | ||
| import org.apache.skywalking.oap.server.configuration.api.ConfigChangeWatcher; | ||
| import org.apache.skywalking.oap.server.core.Const; | ||
| import org.apache.skywalking.oap.server.core.alarm.AlarmModule; | ||
| import org.apache.skywalking.oap.server.library.module.ModuleProvider; | ||
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| import java.io.StringReader; | ||
| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * Alarm rules' settings can be dynamically updated via configuration center(s), | ||
| * this class is responsible for monitoring the configuration and parsing them | ||
| * into {@link Rules} and {@link #runningContext}. | ||
| * | ||
| * @author kezhenxu94 | ||
| * @since 6.5.0 | ||
| */ | ||
| public class AlarmRulesWatcher extends ConfigChangeWatcher { | ||
| @Getter | ||
| private volatile Map<String, List<RunningRule>> runningContext; | ||
| private volatile Map<AlarmRule, RunningRule> alarmRuleRunningRuleMap; | ||
| private volatile Rules rules; | ||
| private volatile String settingsString; | ||
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| public AlarmRulesWatcher(Rules defaultRules, ModuleProvider provider) { | ||
| super(AlarmModule.NAME, provider, "alarm-settings"); | ||
| this.runningContext = new HashMap<>(); | ||
| this.alarmRuleRunningRuleMap = new HashMap<>(); | ||
| this.settingsString = Const.EMPTY_STRING; | ||
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| notify(defaultRules); | ||
| } | ||
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| @Override | ||
| public void notify(ConfigChangeEvent value) { | ||
| if (value.getEventType() == EventType.DELETE) { | ||
| settingsString = Const.EMPTY_STRING; | ||
| notify(new Rules()); | ||
| } else { | ||
| settingsString = value.getNewValue(); | ||
| RulesReader rulesReader = new RulesReader(new StringReader(value.getNewValue())); | ||
| Rules rules = rulesReader.readRules(); | ||
| notify(rules); | ||
| } | ||
| } | ||
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| void notify(Rules newRules) { | ||
| Map<AlarmRule, RunningRule> newAlarmRuleRunningRuleMap = new HashMap<>(); | ||
| Map<String, List<RunningRule>> newRunningContext = new HashMap<>(); | ||
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| newRules.getRules().forEach(rule -> { | ||
| /* | ||
| * If there is already an alarm rule that is the same as the new one, we'll reuse its | ||
| * corresponding runningRule, to keep its history metrics | ||
| */ | ||
| RunningRule runningRule = alarmRuleRunningRuleMap.getOrDefault(rule, new RunningRule(rule)); | ||
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| newAlarmRuleRunningRuleMap.put(rule, runningRule); | ||
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| String metricsName = rule.getMetricsName(); | ||
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| List<RunningRule> runningRules = newRunningContext.computeIfAbsent(metricsName, key -> new ArrayList<>()); | ||
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| runningRules.add(runningRule); | ||
| }); | ||
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| this.rules = newRules; | ||
| this.runningContext = newRunningContext; | ||
| this.alarmRuleRunningRuleMap = newAlarmRuleRunningRuleMap; | ||
| } | ||
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| @Override | ||
| public String value() { | ||
| return settingsString; | ||
| } | ||
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| public List<AlarmRule> getRules() { | ||
| return this.rules.getRules(); | ||
| } | ||
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| public List<String> getWebHooks() { | ||
| return this.rules.getWebhooks(); | ||
| } | ||
| } |
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