1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.shardingsphere.infra.metadata.version;
19
20 import lombok.Getter;
21 import lombok.RequiredArgsConstructor;
22
23 import java.util.Arrays;
24 import java.util.Collection;
25
26 /**
27 * Meta data version.
28 */
29 @RequiredArgsConstructor
30 @Getter
31 public final class MetaDataVersion {
32
33 private static final String ACTIVE_VERSION = "active_version";
34
35 private final String key;
36
37 private final String currentActiveVersion;
38
39 private final String nextActiveVersion;
40
41 public MetaDataVersion(final String key) {
42 this.key = key;
43 currentActiveVersion = "";
44 nextActiveVersion = "";
45 }
46
47 /**
48 * Get active version keys.
49 *
50 * @return active version keys
51 */
52 public Collection<String> getActiveVersionKeys() {
53 return Arrays.asList(String.join("/", key, ACTIVE_VERSION), String.join("/", key, ACTIVE_VERSION, currentActiveVersion));
54 }
55 }