Package: TimeProvider$DefaultTimeProvider

TimeProvider$DefaultTimeProvider

name	instruction	branch	complexity	line	method
TimeProvider.DefaultTimeProvider()	M: 0 C: 3 100%	M: 0 C: 0 100%	M: 0 C: 1 100%	M: 0 C: 1 100%	M: 0 C: 1 100%
currentInstant()	M: 0 C: 2 100%	M: 0 C: 0 100%	M: 0 C: 1 100%	M: 0 C: 1 100%	M: 0 C: 1 100%

Coverage

1: /*
2: * *************************************************************************************************************************************************************
3: *
4: * TheseFoolishThings: Miscellaneous utilities
5: * http://tidalwave.it/projects/thesefoolishthings
6: *
7: * Copyright (C) 2009 - 2024 by Tidalwave s.a.s. (http://tidalwave.it)
8: *
9: * *************************************************************************************************************************************************************
10: *
11: * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
12: * You may obtain a copy of the License at
13: *
14: * http://www.apache.org/licenses/LICENSE-2.0
15: *
16: * 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
17: * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
18: *
19: * *************************************************************************************************************************************************************
20: *
21: * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
22: * git clone https://github.com/tidalwave-it/thesefoolishthings-src
23: *
24: * *************************************************************************************************************************************************************
25: */
26: package it.tidalwave.util;
27:
28: import javax.annotation.Nonnull;
29: import java.time.Instant;
30: import java.time.LocalDateTime;
31: import java.time.ZoneId;
32: import java.time.ZonedDateTime;
33: import java.util.concurrent.atomic.AtomicReference;
34: import java.util.function.Supplier;
35:
36: /***************************************************************************************************************************************************************
37: *
38: * A provider of current time. It should be used by code requiring a timestamp, so it can be mocked during tests.
39: * {@code MockTimeProvider} in module "Test Utilities" is a suitable mock for performing tests.
40: *
41: * @author Fabrizio Giudici
42: * @since 3.2-ALPHA-1 (was previously InstantProvider since 1.39)
43: *
44: **************************************************************************************************************************************************************/
45: @FunctionalInterface
46: public interface TimeProvider extends Supplier<Instant>
47: {
48: // FIXME: should be private
49: public static AtomicReference<TimeProvider> __INSTANCE = new AtomicReference<>();
50:
51: /***********************************************************************************************************************************************************
52: * Returns the current time.
53: *
54: * @return the current time as an {@link Instant}
55: * @since 3.2-ALPHA-2
56: **********************************************************************************************************************************************************/
57: @Nonnull
58: public Instant currentInstant();
59:
60: /***********************************************************************************************************************************************************
61: * Returns the current time. This method is provided to implement {@link Supplier}{@code <Instant>}.
62: *
63: * @return the current time as an {@link Instant}
64: * @since 3.2-ALPHA-2
65: **********************************************************************************************************************************************************/
66: @Override @Nonnull
67: public default Instant get()
68: {
69: return currentInstant();
70: }
71:
72: /***********************************************************************************************************************************************************
73: * Returns the current time.
74: *
75: * @return the current time as a {@link ZonedDateTime} in the default zone.
76: * @since 3.2-ALPHA-2
77: **********************************************************************************************************************************************************/
78: @Nonnull
79: public default ZonedDateTime currentZonedDateTime()
80: {
81: return ZonedDateTime.ofInstant(currentInstant(), ZoneId.systemDefault());
82: }
83:
84: /***********************************************************************************************************************************************************
85: * Returns the current time.
86: *
87: * @return the current time as a {@link LocalDateTime} in the default zone.
88: * @since 3.2-ALPHA-2
89: **********************************************************************************************************************************************************/
90: @Nonnull
91: public default LocalDateTime currentLocalDateTime()
92: {
93: return LocalDateTime.ofInstant(currentInstant(), ZoneId.systemDefault());
94: }
95:
96: /***********************************************************************************************************************************************************
97: * Returns the default instance.
98: *
99: * @return the default instance
100: * @since 3.2-ALPHA-2
101: **********************************************************************************************************************************************************/
102: @Nonnull
103: public static TimeProvider getInstance()
104: {
105: synchronized (TimeProvider.class)
106: {
107: if (__INSTANCE.get() == null)
108: {
109: __INSTANCE.set(new DefaultTimeProvider());
110: }
111:
112: return __INSTANCE.get();
113: }
114: }
115:
116: /***********************************************************************************************************************************************************
117: *
118: **********************************************************************************************************************************************************/
119: static class DefaultTimeProvider implements TimeProvider
120: {
121: @Override @Nonnull
122: public Instant currentInstant()
123: {
124: return Instant.now();
125: }
126: }
127: }