| /* |
| * 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.support.migration; |
| |
| import org.apache.dubbo.common.config.configcenter.DynamicConfiguration; |
| import org.apache.dubbo.common.utils.StringUtils; |
| import org.apache.dubbo.rpc.model.ApplicationModel; |
| import org.yaml.snakeyaml.Yaml; |
| import org.yaml.snakeyaml.constructor.Constructor; |
| |
| import java.util.Optional; |
| |
| public class MigrationRule { |
| private static final String DUBBO_SERVICEDISCOVERY_MIGRATION_KEY = "dubbo.application.service-discovery.migration"; |
| public static final String DUBBO_SERVICEDISCOVERY_MIGRATION_GROUP = "MIGRATION"; |
| public static final String RULE_KEY = ApplicationModel.getName() + ".migration"; |
| |
| private static DynamicConfiguration configuration = null; |
| |
| static { |
| Optional<DynamicConfiguration> optional = ApplicationModel.getEnvironment().getDynamicConfiguration(); |
| if (optional.isPresent()) { |
| configuration = optional.get(); |
| } |
| } |
| |
| private String key; |
| private MigrationStep step = MigrationStep.FORCE_INTERFACE; |
| |
| public String getKey() { |
| return key; |
| } |
| |
| public void setKey(String key) { |
| this.key = key; |
| } |
| |
| public MigrationStep getStep() { |
| return step; |
| } |
| |
| public void setStep(MigrationStep step) { |
| this.step = step; |
| } |
| |
| public static MigrationRule parse(String rawRule) { |
| if (null == configuration) { |
| return getMigrationRule(null); |
| } |
| |
| if (StringUtils.isBlank(rawRule) || "INIT".equals(rawRule)) { |
| String step = (String)configuration.getInternalProperty(DUBBO_SERVICEDISCOVERY_MIGRATION_KEY); |
| return getMigrationRule(step); |
| |
| } |
| |
| Constructor constructor = new Constructor(MigrationRule.class); |
| Yaml yaml = new Yaml(constructor); |
| return yaml.load(rawRule); |
| } |
| |
| public static MigrationRule queryRule() { |
| if (null == configuration) { |
| return getMigrationRule(null); |
| } |
| |
| String rawRule = configuration.getConfig(MigrationRule.RULE_KEY, DUBBO_SERVICEDISCOVERY_MIGRATION_GROUP); |
| return parse(rawRule); |
| } |
| |
| private static MigrationRule getMigrationRule(String step) { |
| MigrationRule rule = new MigrationRule(); |
| rule.setStep(Enum.valueOf(MigrationStep.class, StringUtils.isBlank(step) ? MigrationStep.APPLICATION_FIRST.name() : step)); |
| return rule; |
| } |
| } |