| /* |
| * 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.dubbo.tag.subnets.utils; |
| |
| import org.apache.dubbo.common.utils.StringUtils; |
| |
| import org.apache.commons.net.util.SubnetUtils; |
| import org.yaml.snakeyaml.LoaderOptions; |
| import org.yaml.snakeyaml.Yaml; |
| import org.yaml.snakeyaml.constructor.SafeConstructor; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| |
| public class SubnetUtil { |
| public static final String TAG_SUBNETS_KEY = "tag.subnets"; |
| |
| private static final Map<String, List<SubnetUtils.SubnetInfo>> cellSubnets = new ConcurrentHashMap<>(); |
| private static final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
| private static final ReentrantReadWriteLock.ReadLock readLock = lock.readLock(); |
| private static final ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock(); |
| |
| public static boolean isEmpty() { |
| try { |
| readLock.lock(); |
| return cellSubnets.isEmpty(); |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| |
| public static void init(String content) { |
| if (StringUtils.isBlank(content)) { |
| return; |
| } |
| try { |
| writeLock.lock(); |
| Yaml yaml = new Yaml(new SafeConstructor(new LoaderOptions())); |
| cellSubnets.clear(); |
| Map<String, List<String>> tmpPathSubnet = (Map<String, List<String>>) yaml.load(content); |
| for (Map.Entry<String, List<String>> entry : tmpPathSubnet.entrySet()) { |
| String path = entry.getKey(); |
| List<SubnetUtils.SubnetInfo> subnetInfos = cellSubnets.computeIfAbsent(path, f -> new ArrayList<SubnetUtils.SubnetInfo>()); |
| entry.getValue().forEach(e -> subnetInfos.add(new SubnetUtils(e.trim()).getInfo())); |
| } |
| } finally { |
| writeLock.unlock(); |
| } |
| } |
| |
| public static String getTagLevelByHost(String host) { |
| try { |
| readLock.lock(); |
| for (Map.Entry<String, List<SubnetUtils.SubnetInfo>> entry : cellSubnets.entrySet()) { |
| for (SubnetUtils.SubnetInfo subnetInfo : entry.getValue()) { |
| if (subnetInfo.isInRange(host)) { |
| return entry.getKey(); |
| } |
| } |
| } |
| return null; |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| } |