annotate sat_frontends/jp/loops.py @ 3668:0eacda79b5d1

CLI (pubsub/cache): `search` implementation rel 361
author Goffi <goffi@goffi.org>
date Wed, 08 Sep 2021 17:58:48 +0200
parents be6d91572633
children 524856bd7b19
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python3
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2
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3 # jp: a SAT command line tool
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4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 import sys
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20 import asyncio
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21 import logging as log
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22 from sat.core.i18n import _
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23 from sat_frontends.jp.constants import Const as C
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24
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25 log.basicConfig(level=log.WARNING,
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26 format='[%(name)s] %(message)s')
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27
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28 USER_INTER_MSG = _("User interruption: good bye")
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29
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30
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31 class QuitException(BaseException):
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32 """Quitting is requested
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33
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34 This is used to stop execution when host.quit() is called
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35 """
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36
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37
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38 def getJPLoop(bridge_name):
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39 if 'dbus' in bridge_name:
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40 import signal
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41 import threading
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42 from gi.repository import GLib
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43
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44 class JPLoop:
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45
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46 def run(self, jp, args, namespace):
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47 signal.signal(signal.SIGINT, self._on_sigint)
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48 self._glib_loop = GLib.MainLoop()
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49 threading.Thread(target=self._glib_loop.run).start()
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50 loop = asyncio.get_event_loop()
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51 loop.run_until_complete(jp.main(args=args, namespace=namespace))
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52 loop.run_forever()
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53
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54 def quit(self, exit_code):
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55 loop = asyncio.get_event_loop()
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56 loop.stop()
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57 self._glib_loop.quit()
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58 sys.exit(exit_code)
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59
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60 def call_later(self, delay, callback, *args):
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61 """call a callback repeatedly
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62
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63 @param delay(int): delay between calls in s
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64 @param callback(callable): method to call
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65 if the callback return True, the call will continue
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66 else the calls will stop
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67 @param *args: args of the callbac
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68 """
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69 loop = asyncio.get_event_loop()
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70 loop.call_later(delay, callback, *args)
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71
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72 def _on_sigint(self, sig_number, stack_frame):
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73 """Called on keyboard interruption
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74
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75 Print user interruption message, set exit code and stop reactor
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76 """
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77 print("\r" + USER_INTER_MSG)
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78 self.quit(C.EXIT_USER_CANCELLED)
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79 else:
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80 import signal
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81 from twisted.internet import asyncioreactor
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82 asyncioreactor.install()
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83 from twisted.internet import reactor, defer
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84
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85 class JPLoop:
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86
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87 def __init__(self):
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88 # exit code must be set when using quit, so if it's not set
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89 # something got wrong and we must report it
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90 self._exit_code = C.EXIT_INTERNAL_ERROR
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91
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92 def run(self, jp, *args):
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93 self.jp = jp
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94 signal.signal(signal.SIGINT, self._on_sigint)
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95 defer.ensureDeferred(self._start(jp, *args))
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96 try:
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97 reactor.run(installSignalHandlers=False)
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98 except SystemExit as e:
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99 self._exit_code = e.code
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100 sys.exit(self._exit_code)
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101
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102 async def _start(self, jp, *args):
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103 fut = asyncio.ensure_future(jp.main(*args))
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104 try:
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105 await defer.Deferred.fromFuture(fut)
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106 except BaseException:
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107 import traceback
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108 traceback.print_exc()
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109 jp.quit(1)
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110
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111 def quit(self, exit_code):
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112 self._exit_code = exit_code
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113 reactor.stop()
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114
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115 def _timeout_cb(self, args, callback, delay):
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116 try:
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117 ret = callback(*args)
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118 # FIXME: temporary hack to avoid traceback when using XMLUI
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119 # to be removed once create_task is not used anymore in
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120 # xmlui_manager (i.e. once sat_frontends.tools.xmlui fully supports
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121 # async syntax)
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122 except QuitException:
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123 return
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124 if ret:
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125 reactor.callLater(delay, self._timeout_cb, args, callback, delay)
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126
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127 def call_later(self, delay, callback, *args):
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128 reactor.callLater(delay, self._timeout_cb, args, callback, delay)
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129
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130 def _on_sigint(self, sig_number, stack_frame):
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131 """Called on keyboard interruption
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132
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133 Print user interruption message, set exit code and stop reactor
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134 """
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135 print("\r" + USER_INTER_MSG)
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136 self._exit_code = C.EXIT_USER_CANCELLED
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137 reactor.callFromThread(reactor.stop)
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138
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139
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140 if bridge_name == "embedded":
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141 raise NotImplementedError
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142 # from sat.core import sat_main
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143 # sat = sat_main.SAT()
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144
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145 return JPLoop