content: /*
   * 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.asterix.clienthelper.commands;
  
  import java.io.IOException;
  import java.net.HttpURLConnection;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.asterix.clienthelper.Args;
  import org.apache.commons.io.IOUtils;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.ObjectMapper;
  
  public class GetClusterStateCommand extends RemoteCommand {
  
      public GetClusterStateCommand(Args args) {
          super(args);
      }
  
      private void logState(String state) {
          final String hostPort = args.getClusterAddress() + ":" + args.getClusterPort();
          log("Cluster " + hostPort + " is " + state + ".");
      }
  
      @Override
      public int execute() throws IOException {
          log("Attempting to determine state of cluster " + hostPort + "...");
          HttpURLConnection conn;
          // 0 = ACTIVE, 1 = DOWN, 2 = UNUSABLE, 3 = OTHER
          try {
              conn = openConnection(args.getClusterStatePath(), Method.GET);
              if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
                  String result = IOUtils.toString(conn.getInputStream(), StandardCharsets.UTF_8.name());
                  ObjectMapper om = new ObjectMapper();
                  JsonNode json = om.readTree(result);
                  final String state = json.get("state").asText();
                  logState(state);
                  switch (state) {
                      case "ACTIVE":
                          return 0;
                      case "UNUSABLE":
                          return 2;
                      default:
                          return 3;
                  }
              }
              logState("UNKNOWN (HTTP error code: " + conn.getResponseCode() + ")");
              return 3;
          } catch (IOException e) { // NOSONAR - log or rethrow exception
              logState("DOWN");
              return 1;
          }
      }
  }
  