VCS/StatusMonitorThread.py

Sat, 02 Jan 2010 18:52:53 +0000

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 02 Jan 2010 18:52:53 +0000
changeset 18
3b1f5d872fd7
parent 13
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child 97
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permissions
-rw-r--r--

More renaming to eric5.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2006 - 2010 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing the VCS status monitor thread base class.
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8 """
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9
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10 import os
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11
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12 from PyQt4.QtCore import QThread, QMutex, QMutexLocker, QWaitCondition, SIGNAL
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13
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14 class VcsStatusMonitorThread(QThread):
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15 """
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16 Class implementing the VCS status monitor thread base class.
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17
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18 @signal vcsStatusMonitorData(QStringList) emitted to update the VCS status
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19 @signal vcsStatusMonitorStatus(QString, QString) emitted to signal the status of the
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20 monitoring thread (ok, nok, op) and a status message
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21 """
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22 def __init__(self, interval, projectDir, vcs, parent = None):
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23 """
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24 Constructor
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25
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26 @param interval new interval in seconds (integer)
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27 @param projectDir project directory to monitor (string)
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28 @param vcs reference to the version control object
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29 @param parent reference to the parent object (QObject)
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30 """
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31 QThread.__init__(self, parent)
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32 self.setObjectName("VcsStatusMonitorThread")
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33
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34 self.setTerminationEnabled(True)
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35
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36 self.projectDir = projectDir
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37 self.vcs = vcs
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38
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39 self.interval = interval
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40 self.autoUpdate = False
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41
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42 self.statusList = []
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43 self.reportedStates = {}
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44 self.shouldUpdate = False
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45
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46 self.monitorMutex = QMutex()
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47 self.monitorCondition = QWaitCondition()
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48 self.__stopIt = False
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49
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50 def run(self):
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51 """
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52 Protected method implementing the tasks action.
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53 """
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54 while not self.__stopIt:
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55 # perform the checking task
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56 self.statusList = []
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57 self.emit(SIGNAL("vcsStatusMonitorStatus(QString, QString)"),
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58 "wait", self.trUtf8("Waiting for lock"))
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59 try:
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60 locked = self.vcs.vcsExecutionMutex.tryLock(5000)
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61 except TypeError:
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62 locked = self.vcs.vcsExecutionMutex.tryLock()
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63 if locked:
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64 try:
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65 self.emit(SIGNAL("vcsStatusMonitorStatus(QString, QString)"),
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66 "op", self.trUtf8("Checking repository status"))
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67 res, statusMsg = self._performMonitor()
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68 finally:
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69 self.vcs.vcsExecutionMutex.unlock()
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70 if res:
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71 status = "ok"
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72 else:
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73 status = "nok"
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74 self.emit(SIGNAL("vcsStatusMonitorStatus(QString, QString)"),
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75 "send", self.trUtf8("Sending data"))
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76 self.emit(SIGNAL("vcsStatusMonitorData(QStringList)"),
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77 self.statusList)
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78 self.emit(SIGNAL("vcsStatusMonitorStatus(QString, QString)"),
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79 status, statusMsg)
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80 else:
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81 self.emit(SIGNAL("vcsStatusMonitorStatus(QString, QString)"),
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82 "timeout", self.trUtf8("Timed out waiting for lock"))
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83
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84 if self.autoUpdate and self.shouldUpdate:
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85 try:
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86 self.vcs.vcsUpdate(self.projectDir, True)
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87 continue # check again
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88 except TypeError:
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89 pass # compatibility for older VCS plugins
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90 self.shouldUpdate = False
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91
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92 # wait until interval has expired checking for a stop condition
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93 self.monitorMutex.lock()
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94 if not self.__stopIt:
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95 self.monitorCondition.wait(self.monitorMutex, self.interval * 1000)
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96 self.monitorMutex.unlock()
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97
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98 self.exit()
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99
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100 def setInterval(self, interval):
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101 """
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102 Public method to change the monitor interval.
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103
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104 @param interval new interval in seconds (integer)
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105 """
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106 locked = self.monitorMutex.tryLock()
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107 self.interval = interval
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108 self.monitorCondition.wakeAll()
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109 if locked:
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110 self.monitorMutex.unlock()
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111
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112 def getInterval(self):
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113 """
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114 Public method to get the monitor interval.
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115
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116 @return interval in seconds (integer)
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117 """
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118 return self.interval
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119
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120 def setAutoUpdate(self, auto):
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121 """
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122 Public method to enable the auto update function.
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123
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124 @param auto status of the auto update function (boolean)
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125 """
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126 self.autoUpdate = auto
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127
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128 def getAutoUpdate(self):
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129 """
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130 Public method to retrieve the status of the auto update function.
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131
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132 @return status of the auto update function (boolean)
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133 """
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134 return self.autoUpdate
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135
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136 def checkStatus(self):
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137 """
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138 Public method to wake up the status monitor thread.
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139 """
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140 locked = self.monitorMutex.tryLock()
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141 self.monitorCondition.wakeAll()
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142 if locked:
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143 self.monitorMutex.unlock()
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144
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145 def stop(self):
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146 """
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147 Public method to stop the monitor thread.
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148 """
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149 locked = self.monitorMutex.tryLock()
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150 self.__stopIt = True
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151 self.monitorCondition.wakeAll()
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152 if locked:
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153 self.monitorMutex.unlock()
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154
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155 def clearCachedState(self, name):
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156 """
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157 Public method to clear the cached VCS state of a file/directory.
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158
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159 @param name name of the entry to be cleared (string)
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160 """
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161 key = name.replace(self.projectDir + os.sep, '')
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162 try:
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163 del self.reportedStates[key]
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164 except KeyError:
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165 pass
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166
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167 def _performMonitor(self):
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168 """
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169 Protected method implementing the real monitoring action.
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170
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171 This method must be overridden and populate the statusList member variable
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172 with a list of strings giving the status in the first column and the
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173 path relative to the project directory starting with the third column.
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174 The allowed status flags are:
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175 <ul>
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176 <li>"A" path was added but not yet comitted</li>
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177 <li>"M" path has local changes</li>
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178 <li>"R" path was deleted and then re-added</li>
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179 <li>"U" path needs an update</li>
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180 <li>"Z" path contains a conflict</li>
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181 <li>" " path is back at normal</li>
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182 </ul>
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183
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184 @return tuple of flag indicating successful operation (boolean) and
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185 a status message in case of non successful operation (QString)
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186 """
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187 raise RuntimeError('Not implemented')

eric ide

mercurial