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.service.accord;
  
  import accord.impl.SafeState;
  
  public interface AccordSafeState<K, V> extends SafeState<V>
  {
      void set(V update);
      V original();
      void invalidate();
      boolean invalidated();
      void preExecute();
  
      AccordCacheEntry<K, V> global();
  
      default boolean hasUpdate()
      {
          return original() != current();
      }
  
      default void revert()
      {
          set(original());
      }
  
      default K key()
      {
          return global().key();
      }
  
      default Throwable failure()
      {
          return global().failure();
      }
  
      default void checkNotInvalidated()
      {
          if (invalidated())
              throw new IllegalStateException("Cannot access invalidated " + this);
      }
  }
  