| /* |
| * 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. |
| */ |
| package org.apache.servicecomb.router.cache; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.servicecomb.governance.event.GovernanceConfigurationChangedEvent; |
| import org.apache.servicecomb.governance.event.GovernanceEventManager; |
| import org.apache.servicecomb.router.model.PolicyRuleItem; |
| import org.apache.servicecomb.router.model.ServiceInfoCache; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.core.env.Environment; |
| import org.springframework.stereotype.Component; |
| import org.springframework.util.CollectionUtils; |
| import org.yaml.snakeyaml.DumperOptions; |
| import org.yaml.snakeyaml.LoaderOptions; |
| import org.yaml.snakeyaml.TypeDescription; |
| import org.yaml.snakeyaml.Yaml; |
| import org.yaml.snakeyaml.constructor.Constructor; |
| import org.yaml.snakeyaml.representer.Representer; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.eventbus.Subscribe; |
| |
| @Component |
| public class RouterRuleCache { |
| private static final Logger LOGGER = LoggerFactory.getLogger(RouterRuleCache.class); |
| |
| public static final String ROUTE_RULE_PREFIX = "servicecomb.routeRule."; |
| |
| private static final String ROUTE_RULE = "servicecomb.routeRule.%s"; |
| |
| private final Environment environment; |
| |
| private final ConcurrentHashMap<String, ServiceInfoCache> serviceInfoCacheMap = new ConcurrentHashMap<>(); |
| |
| private final Object lock = new Object(); |
| |
| private final Representer representer = new Representer(new DumperOptions()); |
| |
| @Autowired |
| public RouterRuleCache(Environment environment) { |
| this.environment = environment; |
| representer.getPropertyUtils().setSkipMissingProperties(true); |
| GovernanceEventManager.register(this); |
| } |
| |
| /** |
| * cache and register callback |
| * |
| * return false when: 1. parsing error 2. rule is null |
| */ |
| public boolean doInit(String targetServiceName) { |
| if (!isServerContainRule(targetServiceName)) { |
| return false; |
| } |
| if (!serviceInfoCacheMap.containsKey(targetServiceName)) { |
| synchronized (lock) { |
| if (serviceInfoCacheMap.containsKey(targetServiceName)) { |
| return true; |
| } |
| return addAllRule(targetServiceName, environment.getProperty(String.format(ROUTE_RULE, targetServiceName), "")); |
| } |
| } |
| return true; |
| } |
| |
| @Subscribe |
| public void onConfigurationChangedEvent(GovernanceConfigurationChangedEvent event) { |
| for (String key : event.getChangedConfigurations()) { |
| if (key.startsWith(ROUTE_RULE_PREFIX)) { |
| serviceInfoCacheMap.remove(key.substring(ROUTE_RULE_PREFIX.length())); |
| } |
| } |
| } |
| |
| private boolean addAllRule(String targetServiceName, String ruleStr) { |
| if (StringUtils.isEmpty(ruleStr)) { |
| return false; |
| } |
| List<PolicyRuleItem> policyRuleItemList; |
| try { |
| Yaml entityParser = new Yaml( |
| new Constructor(new TypeDescription(PolicyRuleItem[].class, PolicyRuleItem[].class), new LoaderOptions()), |
| representer); |
| policyRuleItemList = Arrays |
| .asList(entityParser.loadAs(ruleStr, PolicyRuleItem[].class)); |
| } catch (Exception e) { |
| LOGGER.warn("Route management serialization for service {} failed: {}", targetServiceName, e.getMessage()); |
| return false; |
| } |
| if (CollectionUtils.isEmpty(policyRuleItemList)) { |
| LOGGER.warn("Route management serialization for service {} is empty", targetServiceName); |
| return false; |
| } |
| ServiceInfoCache serviceInfoCache = new ServiceInfoCache(policyRuleItemList); |
| serviceInfoCacheMap.put(targetServiceName, serviceInfoCache); |
| return true; |
| } |
| |
| /** |
| * if a server don't have rule , avoid registered too many callback , it may cause memory leak |
| */ |
| private boolean isServerContainRule(String targetServiceName) { |
| return !StringUtils.isEmpty(environment.getProperty(String.format(ROUTE_RULE, targetServiceName), "")); |
| } |
| |
| public ConcurrentHashMap<String, ServiceInfoCache> getServiceInfoCacheMap() { |
| return serviceInfoCacheMap; |
| } |
| |
| @VisibleForTesting |
| void refresh() { |
| serviceInfoCacheMap.clear(); |
| } |
| |
| public void refresh(String targetServiceName) { |
| serviceInfoCacheMap.remove(targetServiceName); |
| } |
| } |