blob: 3364a64bc8b0f3794f6d10105f42e8cb1bb3e894 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============================LICENSE_END===========================================
*/
package org.onap.dcae.apod.analytics.common.utils;
import java.util.Date;
/**
* Contains Utility methods for creating persistence row keys etc.
*
* @author Rajiv Singla . Creation Date: 11/16/2016.
*/
public abstract class PersistenceUtils {
/**
* Name of the column which will contain Table Key
*/
public static final String TABLE_ROW_KEY_COLUMN_NAME = "key";
/**
* Delimited to be used when creating a row key with multiple fields
*/
public static final String ROW_KEY_DELIMITER = "-";
private PersistenceUtils() {
}
/**
* Creates a decreasing number using current timestamp. Handy when you want to keep records most recent records
* close to the top of column table like HBase
*
* @return decreasing number
*/
public static String getCurrentTimeReverseSubKey() {
final long timeReverseLong = Long.MAX_VALUE - new Date().getTime();
return String.format("%025d", timeReverseLong);
}
}
|
