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.streaming;
  
  import com.google.common.base.Predicate;
  import com.google.common.base.Predicates;
  
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.io.sstable.metadata.StatsMetadata;
  import org.apache.cassandra.repair.PreviewRepairConflictWithIncrementalRepairException;
  import org.apache.cassandra.repair.consistent.ConsistentSession;
  import org.apache.cassandra.repair.consistent.LocalSession;
  import org.apache.cassandra.service.ActiveRepairService;
  import org.apache.cassandra.utils.TimeUUID;
  
  public enum PreviewKind
  {
      NONE(0, (sstable) -> {
          throw new RuntimeException("Can't get preview predicate for preview kind NONE");
      }),
      ALL(1, Predicates.alwaysTrue()),
      UNREPAIRED(2, sstable -> !sstable.isRepaired()),
      REPAIRED(3, new PreviewRepairedSSTablePredicate());
  
      private final int serializationVal;
      private final Predicate<SSTableReader> predicate;
  
      PreviewKind(int serializationVal, Predicate<SSTableReader> predicate)
      {
          assert ordinal() == serializationVal;
          this.serializationVal = serializationVal;
          this.predicate = predicate;
      }
  
      public int getSerializationVal()
      {
          return serializationVal;
      }
  
      public static PreviewKind deserialize(int serializationVal)
      {
          return values()[serializationVal];
      }
  
      public boolean isPreview()
      {
          return this != NONE;
      }
  
      public String logPrefix()
      {
          return isPreview() ? "preview repair" : "repair";
      }
  
      public String logPrefix(TimeUUID sessionId)
      {
          return '[' + logPrefix() + " #" + sessionId.toString() + ']';
      }
  
      public Predicate<SSTableReader> predicate()
      {
          return predicate;
      }
  
      private static class PreviewRepairedSSTablePredicate implements Predicate<SSTableReader>
      {
          public boolean apply(SSTableReader sstable)
          {
              // grab the metadata before checking pendingRepair since this can be nulled out at any time
              StatsMetadata sstableMetadata = sstable.getSSTableMetadata();
              if (sstableMetadata.pendingRepair != null)
              {
                  LocalSession session = ActiveRepairService.instance().consistent.local.getSession(sstableMetadata.pendingRepair);
                  if (session == null)
                      return false;
                  else if (session.getState() == ConsistentSession.State.FINALIZED)
                      return true;
                  else if (session.getState() != ConsistentSession.State.FAILED)
                      throw new PreviewRepairConflictWithIncrementalRepairException(String.format("SSTable %s is marked pending for non-finalized incremental repair session %s, failing preview repair", sstable, sstableMetadata.pendingRepair));
              }
              return sstableMetadata.repairedAt != ActiveRepairService.UNREPAIRED_SSTABLE;
          }
      }
  }
  