content: /**
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * <p>Licensed 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
   *
   * <p>http://www.apache.org/licenses/LICENSE-2.0
   *
   * <p>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 com.alibaba.graphscope.groot.discovery;
  
  import com.alibaba.graphscope.groot.CuratorUtils;
  import com.alibaba.graphscope.groot.common.config.CommonConfig;
  import com.alibaba.graphscope.groot.common.config.Configs;
  import com.alibaba.graphscope.groot.common.exception.InvalidArgumentException;
  
  import org.apache.curator.framework.CuratorFramework;
  
  public class DiscoveryFactory {
  
      private final Configs configs;
  
      public DiscoveryFactory(Configs configs) {
          this.configs = configs;
      }
  
      private CuratorFramework curator = null;
  
      private CuratorFramework getCurator() {
          if (this.curator == null) {
              this.curator = CuratorUtils.makeCurator(this.configs);
              this.curator.start();
          }
          return this.curator;
      }
  
      public NodeDiscovery makeDiscovery(LocalNodeProvider localNodeProvider) {
          String discoveryMode = CommonConfig.DISCOVERY_MODE.get(this.configs).toUpperCase();
          switch (discoveryMode) {
              case "FILE":
                  return new FileDiscovery(this.configs);
              case "ZOOKEEPER":
                  return new ZkDiscovery(this.configs, localNodeProvider, getCurator());
              default:
                  throw new InvalidArgumentException(
                          "invalid discovery mode [" + discoveryMode + "]");
          }
      }
  }
  