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;
  
  import java.util.EnumMap;
  import java.util.Map;
  
  import io.netty.util.concurrent.FastThreadLocal;
  import org.apache.cassandra.net.Message;
  import org.apache.cassandra.net.ParamType;
  
  public class MessageParams
  {
      private static final FastThreadLocal<Map<ParamType, Object>> local = new FastThreadLocal<>();
  
      private MessageParams()
      {
      }
  
      private static Map<ParamType, Object> get()
      {
          Map<ParamType, Object> instance = local.get();
          if (instance == null)
          {
              instance = new EnumMap<>(ParamType.class);
              local.set(instance);
          }
  
          return instance;
      }
  
      public static void add(ParamType key, Object value)
      {
          get().put(key, value);
      }
  
      public static <T> T get(ParamType key)
      {
          return (T) get().get(key);
      }
  
      public static void remove(ParamType key)
      {
          get().remove(key);
      }
  
      public static void reset()
      {
          get().clear();
      }
  
      public static <T> Message<T> addToMessage(Message<T> message)
      {
          return message.withParams(get());
      }
  }
  