Utilities/BackgroundService.py

Wed, 21 Jun 2017 19:40:59 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 21 Jun 2017 19:40:59 +0200
changeset 5762
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parent 5741
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child 5874
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permissions
-rw-r--r--

Added functionality to limit the number of processes used for bachground services.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2013 - 2017 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5 # pylint: disable=C0103
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6
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7 """
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8 Module implementing a background service for the various checkers and other
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9 python interpreter dependent functions.
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10 """
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11
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12 from __future__ import unicode_literals
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13
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14 import json
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15 import os
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16 import struct
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17 import sys
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18 from zlib import adler32
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19
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20 from PyQt5.QtCore import QProcess, pyqtSignal, QTimer
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21 from PyQt5.QtWidgets import QApplication
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22 from PyQt5.QtNetwork import QTcpServer, QHostAddress
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23
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24 from E5Gui import E5MessageBox
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25 from E5Gui.E5Application import e5App
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26 import Preferences
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27 import Utilities
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28
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29 from eric6config import getConfig
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30
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31
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32 class BackgroundService(QTcpServer):
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33 """
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34 Class implementing the main part of the background service.
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35
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36 @signal serviceNotAvailable(function, language, filename, message)
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37 emitted to indicate the non-availability of a service function
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38 (str, str, str, str)
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39 @signal batchJobDone(function, language) emitted to indicate the end of
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40 a batch job (str, str)
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41 """
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42 serviceNotAvailable = pyqtSignal(str, str, str, str)
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43 batchJobDone = pyqtSignal(str, str)
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44
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45 def __init__(self):
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46 """
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47 Constructor of the BackgroundService class.
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48 """
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49 self.processes = {}
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50 self.connections = {}
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51 self.isWorking = None
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52 self.runningJob = [None, None, None, None]
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53 self.__queue = []
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54 self.services = {}
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55
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56 super(BackgroundService, self).__init__()
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57
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58 networkInterface = Preferences.getDebugger("NetworkInterface")
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59 if networkInterface == "all" or '.' in networkInterface:
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60 self.hostAddress = '127.0.0.1'
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61 else:
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62 self.hostAddress = '::1'
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63 self.listen(QHostAddress(self.hostAddress))
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64
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65 self.newConnection.connect(self.on_newConnection)
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66
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67 port = self.serverPort()
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68 ## Note: Need the port if started external in debugger:
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69 print('BackgroundService listening on: {0:d}'.format(port))
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70 # __IGNORE_WARNING__
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71 for pyName in ['Python', 'Python3']:
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72 interpreter = Preferences.getDebugger(
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73 pyName + "Interpreter")
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74 process = self.__startExternalClient(interpreter, port)
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75 if process:
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76 if pyName == 'Python':
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77 pyName = 'Python2'
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78 self.processes[pyName] = process, interpreter
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79
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80 def __startExternalClient(self, interpreter, port):
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81 """
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82 Private method to start the background client as external process.
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83
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84 @param interpreter path and name of the executable to start (string)
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85 @param port socket port to which the interpreter should connect (int)
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86 @return the process object (QProcess or None)
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87 """
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88 if interpreter == "" or not Utilities.isinpath(interpreter):
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89 return None
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90
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91 backgroundClient = os.path.join(
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92 getConfig('ericDir'),
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93 "Utilities", "BackgroundClient.py")
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94 proc = QProcess()
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95 proc.setProcessChannelMode(QProcess.ForwardedChannels)
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96 args = [backgroundClient, self.hostAddress, str(port),
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97 str(Preferences.getUI("BackgroundServiceProcesses"))]
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98 proc.start(interpreter, args)
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99 if not proc.waitForStarted(10000):
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100 proc = None
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101 return proc
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102
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103 def __processQueue(self):
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104 """
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105 Private method to take the next service request and send it to the
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106 client.
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107 """
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108 if self.__queue and self.isWorking is None:
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109 fx, lang, fn, data = self.__queue.pop(0)
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110 self.isWorking = lang
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111 self.runningJob = fx, lang, fn, data
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112 self.__send(fx, lang, fn, data)
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113
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114 def __send(self, fx, lang, fn, data):
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115 """
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116 Private method to send a job request to one of the clients.
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117
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118 @param fx remote function name to execute (str)
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119 @param lang language to connect to (str)
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120 @param fn filename for identification (str)
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121 @param data function argument(s) (any basic datatype)
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122 """
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123 self.__cancelled = False
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124 connection = self.connections.get(lang)
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125 if connection is None:
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126 if fx != 'INIT':
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127 # Avoid growing recursion deep which could itself result in an
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128 # exception
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129 QTimer.singleShot(
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diff changeset
130 0,
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131 lambda: self.serviceNotAvailable.emit(
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132 fx, lang, fn, self.tr(
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133 '{0} not configured.').format(lang)))
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134 # Reset flag and continue processing queue
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135 self.isWorking = None
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136 self.__processQueue()
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137 else:
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138 packedData = json.dumps([fx, fn, data])
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139 if sys.version_info[0] == 3:
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140 packedData = bytes(packedData, 'utf-8')
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141 header = struct.pack(
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142 b'!II', len(packedData), adler32(packedData) & 0xffffffff)
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143 connection.write(header)
4221
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144 connection.write(b'JOB ') # 6 character message type
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145 connection.write(packedData)
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146
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147 def __receive(self, lang):
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148 """
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149 Private method to receive the response from the clients.
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150
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151 @param lang language of the incomming connection (str)
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152 """
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153 connection = self.connections[lang]
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154 while connection.bytesAvailable():
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81278aff6af9 Fixed an issue in the batch checker cancel function leading to the function not working if the background jobs had finished already.
Detlev Offenbach <detlev@die-offenbachs.de>
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diff changeset
155 if self.__cancelled:
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diff changeset
156 connection.readAll()
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diff changeset
157 continue
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Detlev Offenbach <detlev@die-offenbachs.de>
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158
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diff changeset
159 header = connection.read(struct.calcsize(b'!II'))
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diff changeset
160 length, datahash = struct.unpack(b'!II', header)
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161
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diff changeset
162 packedData = b''
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parents: 4021
diff changeset
163 while len(packedData) < length:
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164 connection.waitForReadyRead(50)
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165 packedData += connection.read(length - len(packedData))
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166
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167 assert adler32(packedData) & 0xffffffff == datahash, \
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parents: 4021
diff changeset
168 'Hashes not equal'
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diff changeset
169 if sys.version_info[0] == 3:
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diff changeset
170 packedData = packedData.decode('utf-8')
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171 # "check" if is's a tuple of 3 values
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172 fx, fn, data = json.loads(packedData)
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173
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174 if fx == 'INIT':
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175 pass
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176 elif fx == 'EXCEPTION':
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177 # Remove connection because it'll close anyway
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178 self.connections.pop(lang, None)
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179 # Call sys.excepthook(type, value, traceback) to emulate the
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180 # exception which was caught on the client
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181 sys.excepthook(*data)
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182 res = E5MessageBox.question(
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183 None,
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184 self.tr("Restart background client?"),
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185 self.tr(
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186 "<p>The background client for <b>{0}</b> has stopped"
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187 " due to an exception. It's used by various plug-ins"
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188 " like the different checkers.</p>"
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189 "<p>Select"
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190 "<ul>"
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191 "<li><b>'Yes'</b> to restart the client, but abort the"
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192 " last job</li>"
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193 "<li><b>'Retry'</b> to restart the client and the last"
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parents: 4021
diff changeset
194 " job</li>"
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195 "<li><b>'No'</b> to leave the client off.</li>"
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diff changeset
196 "</ul></p>"
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197 "<p>Note: The client can be restarted by opening and"
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diff changeset
198 " accepting the preferences dialog or reloading/"
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 4021
diff changeset
199 "changing the project.</p>").format(lang),
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200 E5MessageBox.Yes | E5MessageBox.No | E5MessageBox.Retry,
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diff changeset
201 E5MessageBox.Yes)
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diff changeset
202
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parents: 4021
diff changeset
203 if res == E5MessageBox.Retry:
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diff changeset
204 self.enqueueRequest(*self.runningJob)
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205 else:
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diff changeset
206 fx, lng, fn, data = self.runningJob
5741
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parents: 5726
diff changeset
207 try:
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diff changeset
208 self.services[(fx, lng)][3](fx, lng, fn, self.tr(
ece3c72a24c3 Added some error handling to the Background service in case some errors are reported for an already deleted service.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5726
diff changeset
209 'An error in Erics background client stopped the'
ece3c72a24c3 Added some error handling to the Background service in case some errors are reported for an already deleted service.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5726
diff changeset
210 ' service.')
ece3c72a24c3 Added some error handling to the Background service in case some errors are reported for an already deleted service.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5726
diff changeset
211 )
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5726
diff changeset
212 except KeyError:
ece3c72a24c3 Added some error handling to the Background service in case some errors are reported for an already deleted service.
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diff changeset
213 # ignore silently
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diff changeset
214 pass
4218
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diff changeset
215 if res != E5MessageBox.No:
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diff changeset
216 self.isWorking = None
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diff changeset
217 self.restartService(lang, True)
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diff changeset
218 return
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diff changeset
219 elif data == 'Unknown service.':
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diff changeset
220 callback = self.services.get((fx, lang))
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diff changeset
221 if callback:
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diff changeset
222 callback[3](fx, lang, fn, data)
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diff changeset
223 elif fx.startswith("batch_"):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 4021
diff changeset
224 fx = fx.replace("batch_", "")
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parents: 4021
diff changeset
225 if data != "__DONE__":
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 4021
diff changeset
226 callback = self.services.get((fx, lang))
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parents: 4021
diff changeset
227 if callback:
5691
372ac1c1c228 Introduced some code to improve defensive programming in the BackgroundService class.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5616
diff changeset
228 if isinstance(data, (list, tuple)):
372ac1c1c228 Introduced some code to improve defensive programming in the BackgroundService class.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5616
diff changeset
229 callback[2](fn, *data)
372ac1c1c228 Introduced some code to improve defensive programming in the BackgroundService class.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5616
diff changeset
230 elif isinstance(data, str):
372ac1c1c228 Introduced some code to improve defensive programming in the BackgroundService class.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5616
diff changeset
231 callback[3](fx, lang, fn, data)
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232 continue
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233 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 4021
diff changeset
234 self.batchJobDone.emit(fx, lang)
3579
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235 else:
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diff changeset
236 callback = self.services.get((fx, lang))
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Detlev Offenbach <detlev@die-offenbachs.de>
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diff changeset
237 if callback:
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Detlev Offenbach <detlev@die-offenbachs.de>
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diff changeset
238 callback[2](fn, *data)
3159
02cb2adb4868 First implementation for the BackgroundService.
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diff changeset
239
3209
c5432abceb25 CodeStyleChecker moved to background service and done a little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3173
diff changeset
240 self.isWorking = None
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
241 self.__processQueue()
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242
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243 def preferencesOrProjectChanged(self):
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244 """
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245 Public slot to restart the built in languages.
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246 """
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247 for pyName in ['Python', 'Python3']:
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248 interpreter = Preferences.getDebugger(
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249 pyName + "Interpreter")
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250
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251 if pyName == 'Python':
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252 pyName = 'Python2'
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253
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254 # Tweak the processes list to reflect the changed interpreter
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255 proc, inter = self.processes.pop(pyName, [None, None])
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256 self.processes[pyName] = proc, interpreter
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257
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258 self.restartService(pyName)
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259
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260 def restartService(self, language, forceKill=False):
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261 """
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262 Public method to restart a given lanuage.
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263
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264 @param language to restart (str)
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265 @keyparam forceKill flag to kill a running task (bool)
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266 """
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267 try:
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268 proc, interpreter = self.processes.pop(language)
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269 except KeyError:
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270 return
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271
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272 # Don't kill a process if it's still working
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273 if not forceKill:
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274 while self.isWorking is not None:
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275 QApplication.processEvents()
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276
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277 conn = self.connections.pop(language, None)
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278 if conn:
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279 conn.blockSignals(True)
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280 conn.close()
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281 if proc:
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282 proc.close()
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283
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284 port = self.serverPort()
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285 process = self.__startExternalClient(interpreter, port)
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286 if process:
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287 self.processes[language] = process, interpreter
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288
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289 def enqueueRequest(self, fx, lang, fn, data):
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290 """
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291 Public method implementing a queued processing of incomming events.
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292
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293 Dublicate service requests updates an older request to avoid overrun or
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294 starving of the services.
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295 @param fx function name of the service (str)
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296 @param lang language to connect to (str)
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297 @param fn filename for identification (str)
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298 @param data function argument(s) (any basic datatype(s))
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299 """
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300 args = [fx, lang, fn, data]
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301 if fx == 'INIT':
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302 self.__queue.insert(0, args)
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303 else:
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304 for pendingArg in self.__queue:
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305 # Check if it's the same service request (fx, lang, fn equal)
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306 if pendingArg[:3] == args[:3]:
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307 # Update the data
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308 pendingArg[3] = args[3]
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309 break
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310 else:
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311 self.__queue.append(args)
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312 self.__processQueue()
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313
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314 def requestCancel(self, fx, lang):
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315 """
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316 Public method to ask a batch job to terminate.
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317
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318 @param fx function name of the service (str)
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319 @param lang language to connect to (str)
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320 """
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321 self.__cancelled = True
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322
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323 entriesToRemove = []
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324 for pendingArg in self.__queue:
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325 if pendingArg[:2] == [fx, lang]:
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326 entriesToRemove.append(pendingArg)
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327 for entryToRemove in entriesToRemove:
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328 self.__queue.remove(entryToRemove)
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329
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330 connection = self.connections.get(lang)
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331 if connection is None:
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332 return
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333 else:
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334 header = struct.pack(b'!II', 0, 0)
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335 connection.write(header)
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diff changeset
336 connection.write(b'CANCEL') # 6 character message type
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337
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338 def serviceConnect(
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339 self, fx, lang, modulepath, module, callback,
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340 onErrorCallback=None, onBatchDone=None):
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341 """
3591
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342 Public method to announce a new service to the background
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343 service/client.
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344
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345 @param fx function name of the service (str)
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346 @param lang language of the new service (str)
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347 @param modulepath full path to the module (str)
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348 @param module name to import (str)
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349 @param callback function called on service response (function)
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350 @param onErrorCallback function called, if client isn't available
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351 (function)
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352 @param onBatchDone function called when a batch job is done (function)
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353 """
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354 self.services[(fx, lang)] = \
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355 modulepath, module, callback, onErrorCallback
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356 self.enqueueRequest('INIT', lang, fx, [modulepath, module])
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357 if onErrorCallback:
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358 self.serviceNotAvailable.connect(onErrorCallback)
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359 if onBatchDone:
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360 self.batchJobDone.connect(onBatchDone)
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T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
361
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
362 def serviceDisconnect(self, fx, lang):
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
363 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3581
diff changeset
364 Public method to remove the service from the service list.
3159
02cb2adb4868 First implementation for the BackgroundService.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents:
diff changeset
365
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
366 @param fx function name of the service (function)
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
367 @param lang language of the service (str)
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1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
368 """
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
369 serviceArgs = self.services.pop((fx, lang), None)
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
370 if serviceArgs and serviceArgs[3]:
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
371 self.serviceNotAvailable.disconnect(serviceArgs[3])
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1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
372
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
373 def on_newConnection(self):
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
374 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3581
diff changeset
375 Private slot for new incomming connections from the clients.
3159
02cb2adb4868 First implementation for the BackgroundService.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents:
diff changeset
376 """
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
377 connection = self.nextPendingConnection()
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
378 if not connection.waitForReadyRead(1000):
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
379 return
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957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
380 lang = connection.read(64)
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
381 if sys.version_info[0] == 3:
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
382 lang = lang.decode('utf-8')
3209
c5432abceb25 CodeStyleChecker moved to background service and done a little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3173
diff changeset
383 # Avoid hanging of eric on shutdown
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
384 if self.connections.get(lang):
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
385 self.connections[lang].close()
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
386 if self.isWorking == lang:
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c5432abceb25 CodeStyleChecker moved to background service and done a little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3173
diff changeset
387 self.isWorking = None
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
388 self.connections[lang] = connection
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
389 connection.readyRead.connect(
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
390 lambda x=lang: self.__receive(x))
3417
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
391 connection.disconnected.connect(
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
392 lambda x=lang: self.on_disconnectSocket(x))
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
393
3241
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
394 for (fx, lng), args in self.services.items():
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
395 if lng == lang:
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
396 # Register service with modulepath and module
957673fc463a Interface for adding different languages to the syntax check, background service
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3209
diff changeset
397 self.enqueueRequest('INIT', lng, fx, args[:2])
3579
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
398
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
399 # Syntax check the open editors again
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
400 try:
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
401 vm = e5App().getObject("ViewManager")
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
402 except KeyError:
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
403 return
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
404 for editor in vm.getOpenEditors():
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
405 if editor.getLanguage() == lang:
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
406 QTimer.singleShot(0, editor.checkSyntax)
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
407
3417
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
408 def on_disconnectSocket(self, lang):
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
409 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3581
diff changeset
410 Private slot called when connection to a client is lost.
3417
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
411
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
412 @param lang client language which connection is lost (str)
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
413 """
3579
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
414 conn = self.connections.pop(lang, None)
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
415 if conn:
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
416 conn.close()
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
417 fx, lng, fn, data = self.runningJob
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
418 if fx != 'INIT' and lng == lang:
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
419 self.services[(fx, lng)][3](fx, lng, fn, self.tr(
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
420 'Erics background client disconnected because of an'
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
421 ' unknown reason.')
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
422 )
3417
5a93c6cdc989 Exception handling for client side implemented.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3241
diff changeset
423 self.isWorking = None
3579
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
424
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
425 res = E5MessageBox.yesNo(
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
426 None,
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
427 self.tr('Background client disconnected.'),
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
428 self.tr(
4997
6dfb9119c85b Fixed a typo.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 4631
diff changeset
429 'The background client for <b>{0}</b> disconnected because'
3579
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
430 ' of an unknown reason.<br>Should it be restarted?'
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
431 ).format(lang),
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
432 yesDefault=True)
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
433 if res:
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
434 self.restartService(lang)
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
435
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
436 def shutdown(self):
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
437 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3581
diff changeset
438 Public method to cleanup the connections and processes when eric is
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3581
diff changeset
439 shuting down.
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
440 """
3579
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
441 for connection in self.connections.values():
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
442 # Prevent calling of on_disconnectSocket
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
443 connection.blockSignals(True)
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
444 connection.close()
3173
1fb284abe46e Interface to add user-defined services, e.g. in plugins. Auto syntax check working. Little cleanup.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3172
diff changeset
445
3579
eccd12461319 BackgroundService: Restart of the client in different situations handled.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3538
diff changeset
446 for process, interpreter in self.processes.values():
3505
84e7cee47d10 Start the background client always as external process.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3484
diff changeset
447 process.close()
84e7cee47d10 Start the background client always as external process.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 3484
diff changeset
448 process = None

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