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.db.guardrails;
  
  import java.util.function.ToLongFunction;
  
  import javax.annotation.Nullable;
  
  import org.apache.cassandra.service.ClientState;
  
  /**
   * A {@link Threshold} guardrail whose values represent a percentage
   * <p>
   * This works exactly as a {@link Threshold}, but provides slightly more convenient error messages for percentage
   */
  public class PercentageThreshold extends MaxThreshold
  {
      /**
       * Creates a new threshold guardrail.
       *
       * @param name            the identifying name of the guardrail
       * @param reason          the optional description of the reason for guarding the operation
       * @param warnThreshold   a {@link ClientState}-based provider of the value above which a warning should be triggered.
       * @param failThreshold   a {@link ClientState}-based provider of the value above which the operation should be aborted.
       * @param messageProvider a function to generate the warning or error message if the guardrail is triggered
       */
      public PercentageThreshold(String name,
                                 @Nullable String reason,
                                 ToLongFunction<ClientState> warnThreshold,
                                 ToLongFunction<ClientState> failThreshold,
                                 ErrorMessageProvider messageProvider)
      {
          super(name, reason, warnThreshold, failThreshold, messageProvider);
      }
  
      @Override
      protected String errMsg(boolean isWarning, String what, long value, long thresholdValue)
      {
          return messageProvider.createMessage(isWarning,
                                               what,
                                               String.format("%d%%", value),
                                               String.format("%d%%", thresholdValue));
      }
  }
  