/*
    * Copyright 2021 TiKV Project Authors.
    *
    * Licensed 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.tikv.common.exception;
  
  import com.google.protobuf.ByteString;
  import java.util.Optional;
  import org.tikv.common.codec.KeyUtils;
  
  public class RawCASConflictException extends RuntimeException {
  
    private final ByteString key;
    private final Optional<ByteString> expectedPrevValue;
    private final Optional<ByteString> prevValue;
  
    public RawCASConflictException(
        ByteString key, Optional<ByteString> expectedPrevValue, Optional<ByteString> prevValue) {
      super(
          String.format(
              "key=%s expectedPrevValue=%s prevValue=%s",
              KeyUtils.formatBytes(key), expectedPrevValue, prevValue));
      this.key = key;
      this.expectedPrevValue = expectedPrevValue;
      this.prevValue = prevValue;
    }
  
    public ByteString getKey() {
      return this.key;
    }
  
    public Optional<ByteString> getExpectedPrevValue() {
      return this.expectedPrevValue;
    }
  
    public Optional<ByteString> getPrevValue() {
      return this.prevValue;
    }
  }