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.cassandra.locator;
  
  import org.apache.cassandra.tcm.membership.Location;
  import org.apache.cassandra.utils.Pair;
  
  import static java.lang.String.format;
  
  public class SnitchUtils
  {
      private SnitchUtils() {}
  
      public static Location parseLocation(String response, String dcSuffix)
      {
          Pair<String, String> pair = parseDcAndRack(response, dcSuffix);
          return new Location(pair.left, pair.right);
      }
  
      public static Pair<String, String> parseDcAndRack(String response, String dcSuffix)
      {
          String[] splits = response.split("/");
          String az = splits[splits.length - 1];
  
          splits = az.split("-");
          String localRack = splits[splits.length - 1];
  
          int lastRegionIndex = az.lastIndexOf('-');
  
          // we would hit StringIndexOutOfBoundsException on the az.substring method if we did not do this
          if (lastRegionIndex == -1)
              throw new IllegalStateException(format("%s does not contain at least one '-' to differentiate " +
                                                     "between datacenter and rack", response));
  
          String localDc = az.substring(0, lastRegionIndex);
  
          localDc = localDc.concat(dcSuffix);
  
          return Pair.create(localDc, localRack);
      }
  }
  