| /* |
| * 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.rpc.cluster.router.xds; |
| |
| import org.apache.dubbo.common.utils.CollectionUtils; |
| import org.apache.dubbo.common.utils.ConcurrentHashMapUtils; |
| import org.apache.dubbo.common.utils.ConcurrentHashSet; |
| import org.apache.dubbo.registry.xds.util.PilotExchanger; |
| import org.apache.dubbo.registry.xds.util.protocol.message.ListenerResult; |
| import org.apache.dubbo.registry.xds.util.protocol.message.RouteResult; |
| import org.apache.dubbo.rpc.cluster.router.xds.rule.XdsRouteRule; |
| |
| import io.envoyproxy.envoy.config.route.v3.VirtualHost; |
| |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.function.Consumer; |
| |
| public class RdsRouteRuleManager { |
| |
| private static final ConcurrentHashMap<String, Set<XdsRouteRuleListener>> RULE_LISTENERS = |
| new ConcurrentHashMap<>(); |
| |
| private static final ConcurrentHashMap<String, List<XdsRouteRule>> ROUTE_DATA_CACHE = new ConcurrentHashMap<>(); |
| |
| private static final ConcurrentMap<String, RdsVirtualHostListener> RDS_LISTENERS = new ConcurrentHashMap<>(); |
| |
| private static volatile Consumer<Map<String, ListenerResult>> LDS_LISTENER; |
| |
| private static volatile Consumer<Map<String, RouteResult>> RDS_LISTENER; |
| |
| private static Map<String, RouteResult> RDS_RESULT; |
| |
| public RdsRouteRuleManager() {} |
| |
| public synchronized void subscribeRds(String domain, XdsRouteRuleListener listener) { |
| |
| Set<XdsRouteRuleListener> listeners = |
| ConcurrentHashMapUtils.computeIfAbsent(RULE_LISTENERS, domain, key -> new ConcurrentHashSet<>()); |
| if (CollectionUtils.isEmpty(listeners)) { |
| doSubscribeRds(domain); |
| } |
| listeners.add(listener); |
| |
| if (ROUTE_DATA_CACHE.containsKey(domain)) { |
| listener.onRuleChange(domain, ROUTE_DATA_CACHE.get(domain)); |
| } |
| } |
| |
| private void doSubscribeRds(String domain) { |
| synchronized (RdsRouteRuleManager.class) { |
| if (RDS_LISTENER == null) { |
| RDS_LISTENER = rds -> { |
| if (rds == null) { |
| return; |
| } |
| for (RouteResult routeResult : rds.values()) { |
| for (String domainToNotify : RDS_LISTENERS.keySet()) { |
| VirtualHost virtualHost = routeResult.searchVirtualHost(domainToNotify); |
| if (virtualHost != null) { |
| RDS_LISTENERS.get(domainToNotify).parseVirtualHost(virtualHost); |
| } |
| } |
| } |
| RDS_RESULT = rds; |
| }; |
| } |
| if (LDS_LISTENER == null) { |
| LDS_LISTENER = new Consumer<Map<String, ListenerResult>>() { |
| private volatile Set<String> configNames = null; |
| |
| @Override |
| public void accept(Map<String, ListenerResult> listenerResults) { |
| if (listenerResults.size() == 1) { |
| for (ListenerResult listenerResult : listenerResults.values()) { |
| Set<String> newConfigNames = listenerResult.getRouteConfigNames(); |
| if (configNames == null) { |
| PilotExchanger.getInstance().observeRds(newConfigNames, RDS_LISTENER); |
| } else if (!configNames.equals(newConfigNames)) { |
| PilotExchanger.getInstance().unObserveRds(configNames, RDS_LISTENER); |
| PilotExchanger.getInstance().observeRds(newConfigNames, RDS_LISTENER); |
| } |
| configNames = newConfigNames; |
| } |
| } |
| } |
| }; |
| if (PilotExchanger.isEnabled()) { |
| PilotExchanger.getInstance().observeLds(LDS_LISTENER); |
| } |
| } |
| } |
| ConcurrentHashMapUtils.computeIfAbsent(RDS_LISTENERS, domain, key -> new RdsVirtualHostListener(domain, this)); |
| RDS_LISTENER.accept(RDS_RESULT); |
| } |
| |
| public synchronized void unSubscribeRds(String domain, XdsRouteRuleListener listener) { |
| Set<XdsRouteRuleListener> listeners = RULE_LISTENERS.get(domain); |
| if (CollectionUtils.isEmpty(listeners)) { |
| return; |
| } |
| listeners.remove(listener); |
| if (listeners.isEmpty()) { |
| RULE_LISTENERS.remove(domain); |
| doUnsubscribeRds(domain); |
| } |
| } |
| |
| private void doUnsubscribeRds(String domain) { |
| RDS_LISTENERS.remove(domain); |
| } |
| |
| public void notifyRuleChange(String domain, List<XdsRouteRule> xdsRouteRules) { |
| |
| ROUTE_DATA_CACHE.put(domain, xdsRouteRules); |
| |
| Set<XdsRouteRuleListener> listeners = RULE_LISTENERS.get(domain); |
| if (CollectionUtils.isEmpty(listeners)) { |
| return; |
| } |
| boolean empty = CollectionUtils.isEmpty(xdsRouteRules); |
| for (XdsRouteRuleListener listener : listeners) { |
| if (empty) { |
| listener.clearRule(domain); |
| } else { |
| listener.onRuleChange(domain, xdsRouteRules); |
| } |
| } |
| } |
| |
| // for test |
| static ConcurrentHashMap<String, Set<XdsRouteRuleListener>> getRuleListeners() { |
| return RULE_LISTENERS; |
| } |
| |
| // for test |
| static ConcurrentHashMap<String, List<XdsRouteRule>> getRouteDataCache() { |
| return ROUTE_DATA_CACHE; |
| } |
| |
| // for test |
| static Map<String, RdsVirtualHostListener> getRdsListeners() { |
| return RDS_LISTENERS; |
| } |
| } |