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.lifecycle;
  
  import java.util.Collection;
  import java.util.Set;
  
  import com.google.common.collect.Iterables;
  
  import org.apache.cassandra.db.compaction.OperationType;
  import org.apache.cassandra.io.sstable.SSTable;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.utils.Throwables;
  import org.apache.cassandra.utils.TimeUUID;
  import org.apache.cassandra.utils.concurrent.Transactional;
  
  public interface ILifecycleTransaction extends Transactional
  {
      void trackNew(SSTable sstable);
      void untrackNew(SSTable sstable);
      OperationType opType();
      void checkpoint();
      void update(SSTableReader reader, boolean original);
      void update(Collection<SSTableReader> readers, boolean original);
      SSTableReader current(SSTableReader reader);
      void obsolete(SSTableReader reader);
      void obsoleteOriginals();
      Set<SSTableReader> originals();
      boolean isObsolete(SSTableReader reader);
      boolean isOffline();
      TimeUUID opId();
  
      /// Op identifier as a string to use in debug prints. Usually just the opId, with added part information for partial
      /// transactions.
      default String opIdString()
      {
          return opId().toString();
      }
  
      void cancel(SSTableReader removedSSTable);
  
      default void abort()
      {
          Throwables.maybeFail(abort(null));
      }
  
      default void commit()
      {
          Throwables.maybeFail(commit(null));
      }
  
      default SSTableReader onlyOne()
      {
          final Set<SSTableReader> originals = originals();
          assert originals.size() == 1;
          return Iterables.getFirst(originals, null);
      }
  }
  