| /* |
| * 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.mesh.route; |
| |
| import org.apache.dubbo.common.config.configcenter.ConfigChangeType; |
| import org.apache.dubbo.common.config.configcenter.ConfigChangedEvent; |
| import org.apache.dubbo.common.config.configcenter.ConfigurationListener; |
| import org.apache.dubbo.common.logger.ErrorTypeAwareLogger; |
| import org.apache.dubbo.common.logger.LoggerFactory; |
| import org.apache.dubbo.common.utils.CollectionUtils; |
| import org.apache.dubbo.rpc.cluster.router.mesh.util.MeshRuleDispatcher; |
| import org.apache.dubbo.rpc.cluster.router.mesh.util.MeshRuleListener; |
| |
| import org.yaml.snakeyaml.Yaml; |
| import org.yaml.snakeyaml.constructor.SafeConstructor; |
| import org.yaml.snakeyaml.representer.Representer; |
| |
| import java.text.MessageFormat; |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import static org.apache.dubbo.common.constants.LoggerCodeConstants.CLUSTER_FAILED_RECEIVE_RULE; |
| import static org.apache.dubbo.rpc.cluster.router.mesh.route.MeshRuleConstants.METADATA_KEY; |
| import static org.apache.dubbo.rpc.cluster.router.mesh.route.MeshRuleConstants.NAME_KEY; |
| import static org.apache.dubbo.rpc.cluster.router.mesh.route.MeshRuleConstants.STANDARD_ROUTER_KEY; |
| |
| |
| public class MeshAppRuleListener implements ConfigurationListener { |
| |
| private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(MeshAppRuleListener.class); |
| |
| private final MeshRuleDispatcher meshRuleDispatcher; |
| |
| private final String appName; |
| |
| private volatile Map<String, List<Map<String, Object>>> ruleMapHolder; |
| |
| public MeshAppRuleListener(String appName) { |
| this.appName = appName; |
| this.meshRuleDispatcher = new MeshRuleDispatcher(appName); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void receiveConfigInfo(String configInfo) { |
| if (logger.isDebugEnabled()) { |
| logger.debug(MessageFormat.format("[MeshAppRule] Received rule for app [{0}]: {1}.", |
| appName, configInfo)); |
| } |
| try { |
| Map<String, List<Map<String, Object>>> groupMap = new HashMap<>(); |
| |
| Representer representer = new Representer(); |
| representer.getPropertyUtils().setSkipMissingProperties(true); |
| Yaml yaml = new Yaml(new SafeConstructor(), representer); |
| Iterable<Object> yamlIterator = yaml.loadAll(configInfo); |
| |
| for (Object obj : yamlIterator) { |
| if (obj instanceof Map) { |
| Map<String, Object> resultMap = (Map<String, Object>) obj; |
| |
| String ruleType = computeRuleType(resultMap); |
| if (ruleType != null) { |
| groupMap.computeIfAbsent(ruleType, (k)-> new LinkedList<>()).add(resultMap); |
| } else { |
| logger.error(CLUSTER_FAILED_RECEIVE_RULE,"receive mesh app route rule is invalid","","Unable to get rule type from raw rule. " + |
| "Probably the metadata.name is absent. App Name: " + appName + " RawRule: " + configInfo); |
| } |
| } else { |
| logger.error(CLUSTER_FAILED_RECEIVE_RULE,"receive mesh app route rule is invalid","","Rule format is unacceptable. App Name: " + appName + " RawRule: " + configInfo); |
| } |
| } |
| |
| ruleMapHolder = groupMap; |
| } catch (Exception e) { |
| logger.error(CLUSTER_FAILED_RECEIVE_RULE,"failed to receive mesh app route rule","","[MeshAppRule] parse failed: " + configInfo,e); |
| } |
| if (ruleMapHolder != null) { |
| meshRuleDispatcher.post(ruleMapHolder); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| private String computeRuleType(Map<String, Object> rule) { |
| Object obj = rule.get(METADATA_KEY); |
| if (obj instanceof Map && CollectionUtils.isNotEmptyMap((Map<String, String>) obj)) { |
| Map<String, String> metadata = (Map<String, String>) obj; |
| String name = metadata.get(NAME_KEY); |
| if (!name.contains(".")) { |
| return STANDARD_ROUTER_KEY; |
| } else { |
| return name.substring(name.indexOf(".") + 1); |
| } |
| } |
| return null; |
| } |
| |
| public <T> void register(MeshRuleListener subscriber) { |
| if (ruleMapHolder != null) { |
| List<Map<String, Object>> rule = ruleMapHolder.get(subscriber.ruleSuffix()); |
| if (rule != null) { |
| subscriber.onRuleChange(appName, rule); |
| } |
| } |
| meshRuleDispatcher.register(subscriber); |
| } |
| |
| |
| public <T> void unregister(MeshRuleListener subscriber) { |
| meshRuleDispatcher.unregister(subscriber); |
| } |
| |
| @Override |
| public void process(ConfigChangedEvent event) { |
| if (event.getChangeType() == ConfigChangeType.DELETED) { |
| receiveConfigInfo(""); |
| return; |
| } |
| receiveConfigInfo(event.getContent()); |
| } |
| |
| public boolean isEmpty() { |
| return meshRuleDispatcher.isEmpty(); |
| } |
| |
| /** |
| * For ut only |
| */ |
| @Deprecated |
| public MeshRuleDispatcher getMeshRuleDispatcher() { |
| return meshRuleDispatcher; |
| } |
| } |