Mercurial > libervia-backend
annotate sat/bridge/bridge_constructor/constructors/dbus/dbus_core_template.py @ 2659:c26492bd2144
plugin OTR: use new "directed" attribute when registering + use new markAsEncrypted
author | Goffi <goffi@goffi.org> |
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date | Sat, 11 Aug 2018 18:24:55 +0200 |
parents | 779351da2c13 |
children | 003b8b4b56a7 |
rev | line source |
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1 #!/usr/bin/env python2 |
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2 # -*- coding: utf-8 -*- |
267 | 3 |
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4 # SAT: a jabber client |
2483 | 5 # Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org) |
267 | 6 |
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7 # This program is free software: you can redistribute it and/or modify |
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8 # it under the terms of the GNU Affero General Public License as published by |
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9 # the Free Software Foundation, either version 3 of the License, or |
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10 # (at your option) any later version. |
267 | 11 |
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12 # This program is distributed in the hope that it will be useful, |
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 # GNU Affero General Public License for more details. |
267 | 16 |
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17 # You should have received a copy of the GNU Affero General Public License |
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
267 | 19 |
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20 from sat.core.i18n import _ |
267 | 21 import dbus |
22 import dbus.service | |
23 import dbus.mainloop.glib | |
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24 import inspect |
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25 from sat.core.log import getLogger |
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26 |
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27 log = getLogger(__name__) |
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28 from twisted.internet.defer import Deferred |
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29 from sat.core.exceptions import BridgeInitError |
267 | 30 |
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31 const_INT_PREFIX = "org.salutatoi.SAT" # Interface prefix |
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32 const_ERROR_PREFIX = const_INT_PREFIX + ".error" |
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33 const_OBJ_PATH = "/org/salutatoi/SAT/bridge" |
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34 const_CORE_SUFFIX = ".core" |
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35 const_PLUGIN_SUFFIX = ".plugin" |
267 | 36 |
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37 |
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38 class ParseError(Exception): |
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39 pass |
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40 |
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41 |
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42 class MethodNotRegistered(dbus.DBusException): |
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43 _dbus_error_name = const_ERROR_PREFIX + ".MethodNotRegistered" |
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44 |
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45 |
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46 class InternalError(dbus.DBusException): |
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47 _dbus_error_name = const_ERROR_PREFIX + ".InternalError" |
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48 |
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49 |
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50 class AsyncNotDeferred(dbus.DBusException): |
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51 _dbus_error_name = const_ERROR_PREFIX + ".AsyncNotDeferred" |
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52 |
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53 |
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54 class DeferredNotAsync(dbus.DBusException): |
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55 _dbus_error_name = const_ERROR_PREFIX + ".DeferredNotAsync" |
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56 |
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57 |
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58 class GenericException(dbus.DBusException): |
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59 def __init__(self, twisted_error): |
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60 """ |
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61 |
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62 @param twisted_error (Failure): instance of twisted Failure |
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63 @return: DBusException |
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64 """ |
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65 super(GenericException, self).__init__() |
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66 try: |
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67 # twisted_error.value is a class |
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68 class_ = twisted_error.value().__class__ |
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69 except TypeError: |
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70 # twisted_error.value is an instance |
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71 class_ = twisted_error.value.__class__ |
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72 message = twisted_error.getErrorMessage() |
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73 try: |
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74 self.args = (message, twisted_error.value.condition) |
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75 except AttributeError: |
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76 self.args = (message,) |
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77 self._dbus_error_name = ".".join( |
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78 [const_ERROR_PREFIX, class_.__module__, class_.__name__] |
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79 ) |
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80 |
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81 |
267 | 82 class DbusObject(dbus.service.Object): |
83 def __init__(self, bus, path): | |
84 dbus.service.Object.__init__(self, bus, path) | |
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85 log.debug("Init DbusObject...") |
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86 self.cb = {} |
267 | 87 |
2086 | 88 def register_method(self, name, cb): |
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89 self.cb[name] = cb |
267 | 90 |
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91 def _callback(self, name, *args, **kwargs): |
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92 """call the callback if it exists, raise an exception else |
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93 if the callback return a deferred, use async methods""" |
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94 if not name in self.cb: |
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95 raise MethodNotRegistered |
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96 |
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97 if "callback" in kwargs: |
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98 # we must have errback too |
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99 if not "errback" in kwargs: |
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100 log.error("errback is missing in method call [%s]" % name) |
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101 raise InternalError |
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102 callback = kwargs.pop("callback") |
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103 errback = kwargs.pop("errback") |
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104 async = True |
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105 else: |
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106 async = False |
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107 result = self.cb[name](*args, **kwargs) |
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108 if async: |
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109 if not isinstance(result, Deferred): |
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110 log.error("Asynchronous method [%s] does not return a Deferred." % name) |
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111 raise AsyncNotDeferred |
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112 result.addCallback( |
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113 lambda result: callback() if result is None else callback(result) |
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114 ) |
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115 result.addErrback(lambda err: errback(GenericException(err))) |
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116 else: |
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117 if isinstance(result, Deferred): |
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118 log.error("Synchronous method [%s] return a Deferred." % name) |
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119 raise DeferredNotAsync |
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120 return result |
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121 |
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122 ### signals ### |
267 | 123 |
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124 @dbus.service.signal(const_INT_PREFIX + const_PLUGIN_SUFFIX, signature="") |
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125 def dummySignal(self): |
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126 # FIXME: workaround for addSignal (doesn't work if one method doensn't |
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127 # already exist for plugins), probably missing some initialisation, need |
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128 # further investigations |
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129 pass |
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130 |
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131 ##SIGNALS_PART## |
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132 ### methods ### |
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133 |
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134 ##METHODS_PART## |
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135 def __attributes(self, in_sign): |
267 | 136 """Return arguments to user given a in_sign |
137 @param in_sign: in_sign in the short form (using s,a,i,b etc) | |
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138 @return: list of arguments that correspond to a in_sign (e.g.: "sss" return "arg1, arg2, arg3")""" |
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139 i = 0 |
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140 idx = 0 |
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141 attr = [] |
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142 while i < len(in_sign): |
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143 if in_sign[i] not in ["b", "y", "n", "i", "x", "q", "u", "t", "d", "s", "a"]: |
267 | 144 raise ParseError("Unmanaged attribute type [%c]" % in_sign[i]) |
145 | |
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146 attr.append("arg_%i" % idx) |
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147 idx += 1 |
267 | 148 |
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149 if in_sign[i] == "a": |
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150 i += 1 |
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151 if ( |
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152 in_sign[i] != "{" and in_sign[i] != "(" |
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153 ): # FIXME: must manage tuples out of arrays |
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154 i += 1 |
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155 continue # we have a simple type for the array |
267 | 156 opening_car = in_sign[i] |
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157 assert opening_car in ["{", "("] |
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158 closing_car = "}" if opening_car == "{" else ")" |
267 | 159 opening_count = 1 |
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160 while True: # we have a dict or a list of tuples |
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161 i += 1 |
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162 if i >= len(in_sign): |
267 | 163 raise ParseError("missing }") |
164 if in_sign[i] == opening_car: | |
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165 opening_count += 1 |
267 | 166 if in_sign[i] == closing_car: |
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167 opening_count -= 1 |
267 | 168 if opening_count == 0: |
169 break | |
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170 i += 1 |
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171 return attr |
267 | 172 |
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173 def addMethod(self, name, int_suffix, in_sign, out_sign, method, async=False): |
267 | 174 """Dynamically add a method to Dbus Bridge""" |
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175 inspect_args = inspect.getargspec(method) |
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176 |
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177 _arguments = inspect_args.args |
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178 _defaults = list(inspect_args.defaults or []) |
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179 |
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180 if inspect.ismethod(method): |
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181 # if we have a method, we don't want the first argument (usually 'self') |
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182 del (_arguments[0]) |
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183 |
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184 # first arguments are for the _callback method |
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185 arguments_callback = ", ".join( |
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186 [repr(name)] |
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187 + ( |
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188 (_arguments + ["callback=callback", "errback=errback"]) |
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189 if async |
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190 else _arguments |
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191 ) |
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192 ) |
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193 |
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194 if async: |
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195 _arguments.extend(["callback", "errback"]) |
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196 _defaults.extend([None, None]) |
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197 |
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198 # now we create a second list with default values |
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199 for i in range(1, len(_defaults) + 1): |
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200 _arguments[-i] = "%s = %s" % (_arguments[-i], repr(_defaults[-i])) |
267 | 201 |
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202 arguments_defaults = ", ".join(_arguments) |
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203 |
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204 code = compile( |
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205 "def %(name)s (self,%(arguments_defaults)s): return self._callback(%(arguments_callback)s)" |
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206 % { |
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207 "name": name, |
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208 "arguments_defaults": arguments_defaults, |
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209 "arguments_callback": arguments_callback, |
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210 }, |
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211 "<DBus bridge>", |
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212 "exec", |
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213 ) |
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214 exec(code) # FIXME: to the same thing in a cleaner way, without compile/exec |
267 | 215 method = locals()[name] |
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216 async_callbacks = ("callback", "errback") if async else None |
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217 setattr( |
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218 DbusObject, |
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219 name, |
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220 dbus.service.method( |
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221 const_INT_PREFIX + int_suffix, |
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222 in_signature=in_sign, |
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223 out_signature=out_sign, |
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224 async_callbacks=async_callbacks, |
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225 )(method), |
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226 ) |
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227 function = getattr(self, name) |
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228 func_table = self._dbus_class_table[ |
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229 self.__class__.__module__ + "." + self.__class__.__name__ |
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230 ][function._dbus_interface] |
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231 func_table[function.__name__] = function # Needed for introspection |
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232 |
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233 def addSignal(self, name, int_suffix, signature, doc={}): |
267 | 234 """Dynamically add a signal to Dbus Bridge""" |
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235 attributes = ", ".join(self.__attributes(signature)) |
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236 # TODO: use doc parameter to name attributes |
267 | 237 |
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238 # code = compile ('def '+name+' (self,'+attributes+'): log.debug ("'+name+' signal")', '<DBus bridge>','exec') #XXX: the log.debug is too annoying with xmllog |
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239 code = compile( |
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240 "def " + name + " (self," + attributes + "): pass", "<DBus bridge>", "exec" |
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241 ) |
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242 exec(code) |
267 | 243 signal = locals()[name] |
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244 setattr( |
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245 DbusObject, |
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246 name, |
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247 dbus.service.signal(const_INT_PREFIX + int_suffix, signature=signature)( |
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248 signal |
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249 ), |
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250 ) |
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251 function = getattr(self, name) |
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252 func_table = self._dbus_class_table[ |
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253 self.__class__.__module__ + "." + self.__class__.__name__ |
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254 ][function._dbus_interface] |
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Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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255 func_table[function.__name__] = function # Needed for introspection |
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Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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256 |
267 | 257 |
2086 | 258 class Bridge(object): |
267 | 259 def __init__(self): |
260 dbus.mainloop.glib.DBusGMainLoop(set_as_default=True) | |
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261 log.info("Init DBus...") |
627
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core, bridge, jp, quick_frontend: SàT stop more gracefully if bridge can't be initialised:
Goffi <goffi@goffi.org>
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262 try: |
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263 self.session_bus = dbus.SessionBus() |
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264 except dbus.DBusException as e: |
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265 if e._dbus_error_name == "org.freedesktop.DBus.Error.NotSupported": |
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266 log.error( |
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267 _( |
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268 u"D-Bus is not launched, please see README to see instructions on how to launch it" |
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269 ) |
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270 ) |
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271 raise BridgeInitError |
267 | 272 self.dbus_name = dbus.service.BusName(const_INT_PREFIX, self.session_bus) |
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bridge: templates' constants can now be overrided
Goffi <goffi@goffi.org>
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273 self.dbus_bridge = DbusObject(self.session_bus, const_OBJ_PATH) |
267 | 274 |
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275 ##SIGNAL_DIRECT_CALLS_PART## |
2086 | 276 def register_method(self, name, callback): |
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277 log.debug("registering DBus bridge method [%s]" % name) |
2086 | 278 self.dbus_bridge.register_method(name, callback) |
267 | 279 |
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280 def addMethod(self, name, int_suffix, in_sign, out_sign, method, async=False, doc={}): |
267 | 281 """Dynamically add a method to Dbus Bridge""" |
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282 # FIXME: doc parameter is kept only temporary, the time to remove it from calls |
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283 log.debug("Adding method [%s] to DBus bridge" % name) |
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D-Bus Bridge: use inspection to name attribute + fix asynchronous calls for dynamically added method, it now use deferred return value instead of callback/errback attributes
Goffi <goffi@goffi.org>
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284 self.dbus_bridge.addMethod(name, int_suffix, in_sign, out_sign, method, async) |
2086 | 285 self.register_method(name, method) |
267 | 286 |
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287 def addSignal(self, name, int_suffix, signature, doc={}): |
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288 self.dbus_bridge.addSignal(name, int_suffix, signature, doc) |
2086 | 289 setattr(Bridge, name, getattr(self.dbus_bridge, name)) |