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.simulator.paxos;
  
  import java.util.Arrays;
  import javax.annotation.Nullable;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class LoggingHistoryValidator implements HistoryValidator
  {
      private static final Logger logger = LoggerFactory.getLogger(LoggingHistoryValidator.class);
      private final HistoryValidator delegate;
  
      public LoggingHistoryValidator(HistoryValidator delegate)
      {
          this.delegate = delegate;
      }
  
      @Override
      public Checker witness(Object witnessedBy, int start, int end)
      {
          StringBuilder sb = new StringBuilder();
          sb.append("Witness(start=").append(start).append(", end=").append(end).append(")\n");
          Checker sub = delegate.witness(witnessedBy, start, end);
          return new Checker()
          {
              @Override
              public void read(int pk, int id, int count, int[] seq)
              {
                  sb.append("\tread(pk=").append(pk).append(", id=").append(id).append(", count=").append(count).append(", seq=").append(Arrays.toString(seq)).append(")\n");
                  sub.read(pk, id, count, seq);
              }
  
              @Override
              public void write(int pk, int id, boolean success)
              {
                  sb.append("\twrite(pk=").append(pk).append(", id=").append(id).append(", success=").append(success).append(")\n");
                  sub.write(pk, id, success);
              }
  
              @Override
              public void close()
              {
                  logger.info(sb.toString());
                  sub.close();
              }
          };
      }
  
      @Override
      public void print(@Nullable Integer pk)
      {
          delegate.print(pk);
      }
  }
  