code: /*
   * 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.skywalking.oap.server.cluster.plugin.nacos;
  
  import com.alibaba.nacos.api.PropertyKeyConst;
  import com.alibaba.nacos.api.naming.NamingFactory;
  import com.alibaba.nacos.api.naming.NamingService;
  import java.util.Properties;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.cluster.ClusterCoordinator;
  import org.apache.skywalking.oap.server.core.cluster.ClusterModule;
  import org.apache.skywalking.oap.server.core.cluster.ClusterNodesQuery;
  import org.apache.skywalking.oap.server.core.cluster.ClusterRegister;
  import org.apache.skywalking.oap.server.library.module.ModuleDefine;
  import org.apache.skywalking.oap.server.library.module.ModuleProvider;
  import org.apache.skywalking.oap.server.library.module.ModuleStartException;
  import org.apache.skywalking.oap.server.library.module.ServiceNotProvidedException;
  import org.apache.skywalking.oap.server.library.util.StringUtil;
  
  public class ClusterModuleNacosProvider extends ModuleProvider {
  
      private ClusterModuleNacosConfig config;
      private NamingService namingService;
  
      public ClusterModuleNacosProvider() {
          super();
      }
  
      @Override
      public String name() {
          return "nacos";
      }
  
      @Override
      public Class<? extends ModuleDefine> module() {
          return ClusterModule.class;
      }
  
      @Override
      public ConfigCreator newConfigCreator() {
          return new ConfigCreator<ClusterModuleNacosConfig>() {
              @Override
              public Class type() {
                  return ClusterModuleNacosConfig.class;
              }
  
              @Override
              public void onInitialized(final ClusterModuleNacosConfig initialized) {
                  config = initialized;
              }
          };
      }
  
      @Override
      public void prepare() throws ServiceNotProvidedException, ModuleStartException {
          try {
              Properties properties = new Properties();
              properties.put(PropertyKeyConst.SERVER_ADDR, config.getHostPort());
              properties.put(PropertyKeyConst.NAMESPACE, config.getNamespace());
              if (StringUtil.isNotEmpty(config.getUsername()) && StringUtil.isNotEmpty(config.getAccessKey())) {
                  throw new ModuleStartException("Nacos Auth method should choose either username or accessKey, not both");
              }
              if (StringUtil.isNotEmpty(config.getUsername())) {
                  properties.put(PropertyKeyConst.USERNAME, config.getUsername());
                  properties.put(PropertyKeyConst.PASSWORD, config.getPassword());
              } else if (StringUtil.isNotEmpty(config.getAccessKey())) {
                  properties.put(PropertyKeyConst.ACCESS_KEY, config.getAccessKey());
                  properties.put(PropertyKeyConst.SECRET_KEY, config.getSecretKey());
              }
              namingService = NamingFactory.createNamingService(properties);
              NacosCoordinator coordinator = new NacosCoordinator(getManager(), namingService, config);
              this.registerServiceImplementation(ClusterRegister.class, coordinator);
              this.registerServiceImplementation(ClusterNodesQuery.class, coordinator);
              this.registerServiceImplementation(ClusterCoordinator.class, coordinator);
          } catch (Exception e) {
              throw new ModuleStartException(e.getMessage(), e);
          }
      }
  
      @Override
      public void start() throws ServiceNotProvidedException {
      }
  
      @Override
      public void notifyAfterCompleted() throws ServiceNotProvidedException {
  
      }
  
      @Override
      public String[] requiredModules() {
          return new String[] {CoreModule.NAME};
      }
  }
  