1 | #Region "Microsoft.VisualBasic::bbe487eb9741654e6effbb9023c014fb, Microsoft.VisualBasic.Core\ApplicationServices\Parallel\Tasks\UpdateThread.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Class UpdateThread |
35 | ' |
36 | ' Properties: Caller, ErrHandle, Periods, Running |
37 | ' |
38 | ' Constructor: (+1 Overloads) Sub New |
39 | ' |
40 | ' Function: GetTicks, Start, ToString |
41 | ' |
42 | ' Sub: [Stop], __invoke, __updates, (+2 Overloads) Dispose |
43 | ' |
44 | ' |
45 | ' /********************************************************************************/ |
46 | |
47 | #End Region |
48 | |
49 | Imports System.Runtime.CompilerServices |
50 | Imports Microsoft.VisualBasic.ComponentModel |
51 | Imports Microsoft.VisualBasic.ComponentModel.DataSourceModel |
52 | Imports Microsoft.VisualBasic.ComponentModel.Triggers |
53 | |
54 | Namespace Parallel.Tasks |
55 | |
56 | ''' <summary> |
57 | ''' Running a specific <see cref="System.Action"/> in the background periodically. |
58 | ''' (比较适合用于在服务器上面执行周期性的计划任务) |
59 | ''' </summary> |
60 | Public Class UpdateThread : Inherits ICallbackInvoke |
61 | Implements IDisposable |
62 | Implements ITaskDriver |
63 | Implements ITimer |
64 | |
65 | ''' <summary> |
66 | ''' Sleeps n **ms** interval |
67 | ''' </summary> |
68 | ''' <returns></returns> |
69 | Public Property Periods As Integer Implements ITimer.Interval |
70 | |
71 | ''' <summary> |
72 | ''' If this exception handler is null, then when the unhandled exception occurring, |
73 | ''' this thread object will throw the exception and then stop working. |
74 | ''' </summary> |
75 | ''' <returns></returns> |
76 | Public Property ErrHandle As Action(Of Exception) |
77 | ''' <summary> |
78 | ''' 指示当前的这个任务处理对象是否处于运行状态 |
79 | ''' </summary> |
80 | ''' <returns></returns> |
81 | Public ReadOnly Property Running As Boolean |
82 | |
83 | ''' <summary> |
84 | ''' The caller stack name |
85 | ''' </summary> |
86 | ''' <returns></returns> |
87 | Public ReadOnly Property Caller As String |
88 | |
89 | ''' <summary> |
90 | ''' Running a specific action in the background periodically. The time unit of the parameter <paramref name="Periods"/> is ms or Ticks. |
91 | ''' </summary> |
92 | ''' <param name="Periods">ms for update thread sleeps</param> |
93 | ''' <param name="updates"></param> |
94 | Sub New(Periods As Integer, updates As Action, <CallerMemberName> Optional caller$ = Nothing) |
95 | Call MyBase.New(updates) |
96 | |
97 | Me.Running = False |
98 | Me.Periods = Periods |
99 | Me.Caller = caller |
100 | End Sub |
101 | |
102 | Private Sub __updates() |
103 | Call $"Start running {Me.ToString}....".__DEBUG_ECHO |
104 | Do While Running |
105 | Call __invoke() |
106 | Loop |
107 | Call $"{Me.ToString} thread exit...".__DEBUG_ECHO |
108 | End Sub |
109 | |
110 | ''' <summary> |
111 | ''' 运行这条线程,假若更新线程已经在运行了,则会自动忽略这次调用 |
112 | ''' </summary> |
113 | Public Function Start() As Integer Implements ITaskDriver.Run |
114 | If Running Then |
115 | Return 2 |
116 | Else |
117 | _Running = True |
118 | Call RunTask(AddressOf __updates) |
119 | End If |
120 | |
121 | Return 0 |
122 | End Function |
123 | |
124 | ''' <summary> |
125 | ''' 停止更新线程的运行 |
126 | ''' </summary> |
127 | Public Sub [Stop]() Implements ITimer.Stop |
128 | _Running = False |
129 | End Sub |
130 | |
131 | Private Sub __invoke() |
132 | #If DEBUG Then |
133 | Call _execute() |
134 | #Else |
135 | Try |
136 | Call _execute() |
137 | Catch ex As Exception |
138 | If Not ErrHandle Is Nothing Then |
139 | Call _ErrHandle(ex) |
140 | Else |
141 | Throw |
142 | End If |
143 | Finally |
144 | Call Threading.Thread.Sleep(Periods) |
145 | End Try |
146 | #End If |
147 | End Sub |
148 | |
149 | Public Overrides Function ToString() As String |
150 | Dim state As String = If(Running, NameOf(Running), NameOf([Stop])) |
151 | Return $"[{Caller}::{state}, {Me.Periods}ms] => {Me.CallbackInvoke.ToString}" |
152 | End Function |
153 | |
154 | ''' <summary> |
155 | ''' 获取得到总的毫秒数 |
156 | ''' </summary> |
157 | ''' <param name="hh"></param> |
158 | ''' <param name="mm"></param> |
159 | ''' <param name="ss%"></param> |
160 | ''' <returns></returns> |
161 | Public Shared Function GetTicks(hh As Integer, mm As Integer, Optional ss% = 0) As Integer |
162 | Dim hhss As Integer = hh * 60 * 60 ' 小时的秒数 |
163 | Dim mmss As Integer = mm * 60 |
164 | Dim ticks As Integer = (hhss + mmss + ss) * 1000 |
165 | Return ticks |
166 | End Function |
167 | |
168 | #Region "IDisposable Support" |
169 | Private disposedValue As Boolean ' To detect redundant calls |
170 | |
171 | ' IDisposable |
172 | Protected Overridable Sub Dispose(disposing As Boolean) |
173 | If Not Me.disposedValue Then |
174 | If disposing Then |
175 | Call [Stop]() ' TODO: dispose managed state (managed objects). |
176 | End If |
177 | |
178 | ' TODO: free unmanaged resources (unmanaged objects) and override Finalize() below. |
179 | ' TODO: set large fields to null. |
180 | End If |
181 | Me.disposedValue = True |
182 | End Sub |
183 | |
184 | ' TODO: override Finalize() only if Dispose(disposing As Boolean) above has code to free unmanaged resources. |
185 | 'Protected Overrides Sub Finalize() |
186 | ' ' Do not change this code. Put cleanup code in Dispose(disposing As Boolean) above. |
187 | ' Dispose(False) |
188 | ' MyBase.Finalize() |
189 | 'End Sub |
190 | |
191 | ' This code added by Visual Basic to correctly implement the disposable pattern. |
192 | Public Sub Dispose() Implements IDisposable.Dispose |
193 | ' Do not change this code. Put cleanup code in Dispose(disposing As Boolean) above. |
194 | Dispose(True) |
195 | ' TODO: uncomment the following line if Finalize() is overridden above. |
196 | ' GC.SuppressFinalize(Me) |
197 | End Sub |
198 | #End Region |
199 | End Class |
200 | End Namespace |