| /* |
| * 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; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.servicecomb.router.cache.RouterRuleCache; |
| import org.apache.servicecomb.router.distribute.RouterDistributor; |
| import org.apache.servicecomb.router.match.RouterRuleMatcher; |
| import org.apache.servicecomb.router.model.PolicyRuleItem; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.stereotype.Component; |
| import org.springframework.util.CollectionUtils; |
| |
| @Component |
| public class RouterFilter { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(RouterFilter.class); |
| |
| private final RouterRuleMatcher routerRuleMatcher; |
| |
| private final RouterRuleCache routerRuleCache; |
| |
| @Autowired |
| public RouterFilter(RouterRuleMatcher routerRuleMatcher, RouterRuleCache routerRuleCache) { |
| this.routerRuleMatcher = routerRuleMatcher; |
| this.routerRuleCache = routerRuleCache; |
| } |
| |
| public <T, E> List<T> getFilteredListOfServers(List<T> list, |
| String targetServiceName, Map<String, String> headers, RouterDistributor<T, E> distributer) { |
| if (CollectionUtils.isEmpty(list)) { |
| return list; |
| } |
| if (StringUtils.isEmpty(targetServiceName)) { |
| return list; |
| } |
| // 1.init and cache |
| if (!routerRuleCache.doInit(targetServiceName)) { |
| LOGGER.debug("route management init failed"); |
| return list; |
| } |
| // 2.match rule |
| PolicyRuleItem invokeRule = routerRuleMatcher.match(targetServiceName, headers); |
| |
| if (invokeRule == null) { |
| LOGGER.debug("route management match rule failed"); |
| return list; |
| } |
| |
| LOGGER.debug("route management match rule success: {}", invokeRule); |
| |
| // 3.distribute select endpoint |
| List<T> resultList = distributer.distribute(targetServiceName, list, invokeRule); |
| |
| LOGGER.debug("route management distribute rule success: {}", resultList); |
| |
| return resultList; |
| } |
| } |