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.kubernetes;
  
  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.ServiceNotProvidedException;
  
  /**
   * Use kubernetes to manage all instances in Skywalking cluster.
   */
  public class ClusterModuleKubernetesProvider extends ModuleProvider {
  
      private ClusterModuleKubernetesConfig config;
      private KubernetesCoordinator coordinator;
  
      @Override
      public String name() {
          return "kubernetes";
      }
  
      @Override
      public Class<? extends ModuleDefine> module() {
          return ClusterModule.class;
      }
  
      @Override
      public ConfigCreator newConfigCreator() {
          return new ConfigCreator<ClusterModuleKubernetesConfig>() {
              @Override
              public Class type() {
                  return ClusterModuleKubernetesConfig.class;
              }
  
              @Override
              public void onInitialized(final ClusterModuleKubernetesConfig initialized) {
                  config = initialized;
              }
          };
      }
  
      @Override
      public void prepare() throws ServiceNotProvidedException {
          coordinator = new KubernetesCoordinator(getManager(), config);
          this.registerServiceImplementation(ClusterRegister.class, coordinator);
          this.registerServiceImplementation(ClusterNodesQuery.class, coordinator);
          this.registerServiceImplementation(ClusterCoordinator.class, coordinator);
      }
  
      @Override
      public void start() {
      }
  
      @Override
      public void notifyAfterCompleted() {
      }
  
      @Override
      public String[] requiredModules() {
          return new String[] {CoreModule.NAME};
      }
  }
  