1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase;
20
21 import org.apache.hadoop.hbase.classification.InterfaceAudience;
22 import org.apache.hadoop.hbase.classification.InterfaceStability;
23
24 /**
25 * Ways to keep cells marked for delete around.
26 */
27 /*
28 * Don't change the TRUE/FALSE labels below, these have to be called
29 * this way for backwards compatibility.
30 */
31 @InterfaceAudience.Public
32 @InterfaceStability.Evolving
33 public enum KeepDeletedCells {
34 /** Deleted Cells are not retained. */
35 FALSE,
36 /**
37 * Deleted Cells are retained until they are removed by other means
38 * such TTL or VERSIONS.
39 * If no TTL is specified or no new versions of delete cells are
40 * written, they are retained forever.
41 */
42 TRUE,
43 /**
44 * Deleted Cells are retained until the delete marker expires due to TTL.
45 * This is useful when TTL is combined with MIN_VERSIONS and one
46 * wants to keep a minimum number of versions around but at the same
47 * time remove deleted cells after the TTL.
48 */
49 TTL;
50 }