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annotate sat/bridge/bridge_constructor/constructors/dbus/constructor.py @ 3515:2dce411c2647

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author Goffi <goffi@goffi.org>
date Sat, 01 May 2021 18:23:42 +0200
parents 7550ae9cfbac
children 60d3861e5996
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1 #!/usr/bin/env python3
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2
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3
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4 # Libervia: an XMPP client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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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.
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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.
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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/>.
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19
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20 from sat.bridge.bridge_constructor import base_constructor
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21
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22
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23 class DbusConstructor(base_constructor.Constructor):
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24 NAME = "dbus"
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25 CORE_TEMPLATE = "dbus_core_template.py"
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26 CORE_DEST = "dbus_bridge.py"
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27 CORE_FORMATS = {
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28 "signals": """\
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29 @dbus.service.signal(const_INT_PREFIX+const_{category}_SUFFIX,
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30 signature='{sig_in}')
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31 def {name}(self, {args}):
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32 {body}\n""",
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33 "methods": """\
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34 @dbus.service.method(const_INT_PREFIX+const_{category}_SUFFIX,
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35 in_signature='{sig_in}', out_signature='{sig_out}',
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36 async_callbacks={async_callbacks})
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37 def {name}(self, {args}{async_comma}{async_args_def}):
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38 {debug}return self._callback("{name}", {args_result}{async_comma}{async_args_call})\n""",
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39 "signal_direct_calls": """\
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40 def {name}(self, {args}):
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41 self.dbus_bridge.{name}({args})\n""",
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42 }
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43
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44 FRONTEND_TEMPLATE = "dbus_frontend_template.py"
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45 FRONTEND_DEST = CORE_DEST
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46 FRONTEND_FORMATS = {
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47 "methods": """\
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48 def {name}(self, {args}{async_comma}{async_args}):
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49 {error_handler}{blocking_call}{debug}return {result}\n""",
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50 "async_methods": """\
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51 def {name}(self{async_comma}{args}):
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52 loop = asyncio.get_running_loop()
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53 fut = loop.create_future()
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54 reply_handler = lambda ret=None: loop.call_soon_threadsafe(fut.set_result, ret)
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55 error_handler = lambda err: loop.call_soon_threadsafe(fut.set_exception, dbus_to_bridge_exception(err))
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56 self.db_{category}_iface.{name}({args_result}{async_comma}timeout=const_TIMEOUT, reply_handler=reply_handler, error_handler=error_handler)
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57 {debug}return fut\n""",
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58 }
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59
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60 def core_completion_signal(self, completion, function, default, arg_doc, async_):
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61 completion["category"] = completion["category"].upper()
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62 completion["body"] = (
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63 "pass"
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64 if not self.args.debug
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65 else 'log.debug ("{}")'.format(completion["name"])
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66 )
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67
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68 def core_completion_method(self, completion, function, default, arg_doc, async_):
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69 completion.update(
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70 {
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71 "debug": ""
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72 if not self.args.debug
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73 else 'log.debug ("%s")\n%s' % (completion["name"], 8 * " "),
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74 "args_result": self.getArguments(
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75 function["sig_in"], name=arg_doc, unicode_protect=self.args.unicode
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76 ),
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77 "async_comma": ", " if async_ and function["sig_in"] else "",
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78 "async_args_def": "callback=None, errback=None" if async_ else "",
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79 "async_args_call": "callback=callback, errback=errback" if async_ else "",
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80 "async_callbacks": "('callback', 'errback')" if async_ else "None",
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81 "category": completion["category"].upper(),
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82 }
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83 )
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84
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85 def frontend_completion_method(self, completion, function, default, arg_doc, async_):
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86 completion.update(
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87 {
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88 # XXX: we can manage blocking call in the same way as async one: if callback is None the call will be blocking
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89 "debug": ""
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90 if not self.args.debug
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91 else 'log.debug ("%s")\n%s' % (completion["name"], 8 * " "),
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92 "args_result": self.getArguments(function["sig_in"], name=arg_doc),
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93 "async_args": "callback=None, errback=None",
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94 "async_comma": ", " if function["sig_in"] else "",
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95 "error_handler": """if callback is None:
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96 error_handler = None
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97 else:
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98 if errback is None:
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99 errback = log.error
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100 error_handler = lambda err:errback(dbus_to_bridge_exception(err))
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101 """,
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102 }
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103 )
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104 if async_:
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105 completion["blocking_call"] = ""
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106 completion[
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107 "async_args_result"
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108 ] = "timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler"
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109 else:
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110 # XXX: To have a blocking call, we must have not reply_handler, so we test if callback exists, and add reply_handler only in this case
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111 completion[
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112 "blocking_call"
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113 ] = """kwargs={}
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114 if callback is not None:
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115 kwargs['timeout'] = const_TIMEOUT
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116 kwargs['reply_handler'] = callback
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117 kwargs['error_handler'] = error_handler
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118 """
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119 completion["async_args_result"] = "**kwargs"
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120 result = (
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121 "self.db_%(category)s_iface.%(name)s(%(args_result)s%(async_comma)s%(async_args_result)s)"
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122 % completion
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123 )
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124 completion["result"] = (
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125 "str(%s)" if self.args.unicode and function["sig_out"] == "s" else "%s"
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126 ) % result