aboutsummaryrefslogtreecommitdiff
path: root/juick-common/src/main/java/com/juick/util/DateFormattersHolder.java
blob: 8292e68e2da4db78187199d54545b62337a67bd2 (plain) (blame)
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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
/*
 * Copyright (C) 2008-2017, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.util;

/**
 * Created by aalexeev on 12/7/16.
 */
public class DateFormattersHolder {

    private DateFormattersHolder() {
        throw new IllegalStateException();
    }

    private static volatile DateFormatter messageFormatter;

    public static DateFormatter getMessageFormatterInstance() {
        DateFormatter localInstance = messageFormatter;

        if (localInstance == null) {
            synchronized (DateFormatter.class) {
                localInstance = messageFormatter;

                if (localInstance == null)
                    messageFormatter = localInstance = new DateFormatter("yyyy-MM-dd HH:mm:ss");
            }
        }
        return localInstance;
    }

    private static volatile DateFormatter rssFormatter;

    public static DateFormatter getRssFormatterInstance() {
        DateFormatter localInstance = rssFormatter;

        if (localInstance == null) {
            synchronized (DateFormatter.class) {
                localInstance = rssFormatter;

                if (localInstance == null)
                    rssFormatter = localInstance = new DateFormatter("EEE, d MMM yyyy HH:mm:ss");
            }
        }
        return localInstance;
    }

    private static volatile DateFormatter httpDateFormatter;

    public static DateFormatter getHttpDateFormatter() {
        DateFormatter localInstance = httpDateFormatter;
        if (localInstance == null) {
            synchronized (DateFormatter.class) {
                localInstance = httpDateFormatter;
                if (localInstance == null) {
                    httpDateFormatter = localInstance = new DateFormatter("EEE, dd MMM yyyy HH:mm:ss O");
                }
            }
        }
        return localInstance;
    }
}