content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.journal.raft;
  
  import alluxio.master.journal.SingleEntryJournaled;
  import alluxio.master.journal.checkpoint.CheckpointName;
  import alluxio.proto.journal.Journal;
  
  /**
   * Simple implementation to write and recover the snapshot ID when checkpointing. The snapshot ID
   * is a long that represents the sequence number of the last entry that was processed by the
   * journal. The snapshot ID will be inserted into and retrieved through the
   * {@link Journal.JournalEntry.Builder#setSequenceNumber(long)} and
   * {@link Journal.JournalEntry.Builder#getSequenceNumber()} methods, respectively.
   */
  public class SnapshotIdJournaled extends SingleEntryJournaled {
    @Override
    public CheckpointName getCheckpointName() {
      return CheckpointName.SNAPSHOT_ID;
    }
  }
  