Mercurial > libervia-backend
annotate sat/bridge/bridge_constructor/constructors/embedded/embedded_template.py @ 2770:2d353b74010e
tools (common/data_objects): moved BlogItems._parseMetadata to a parsePubSubMetadata function, so it can be used in a more generic way
author | Goffi <goffi@goffi.org> |
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date | Fri, 11 Jan 2019 21:38:20 +0100 |
parents | 378188abe941 |
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1 #!/usr/bin/env python2 |
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2 # -*- coding: utf-8 -*- |
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3 |
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4 # SàT: a XMPP client |
2483 | 5 # Copyright (C) 2009-2018 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.core.log import getLogger |
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21 |
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22 log = getLogger(__name__) |
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23 from sat.core import exceptions |
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24 |
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25 |
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26 class _Bridge(object): |
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27 def __init__(self): |
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28 log.debug(u"Init embedded bridge...") |
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29 self._methods_cbs = {} |
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30 self._signals_cbs = {"core": {}, "plugin": {}} |
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31 |
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32 def bridgeConnect(self, callback, errback): |
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33 callback() |
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34 |
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35 def register_method(self, name, callback): |
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36 log.debug(u"registering embedded bridge method [{}]".format(name)) |
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37 if name in self._methods_cbs: |
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38 raise exceptions.ConflictError(u"method {} is already regitered".format(name)) |
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39 self._methods_cbs[name] = callback |
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40 |
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41 def register_signal(self, functionName, handler, iface="core"): |
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42 iface_dict = self._signals_cbs[iface] |
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43 if functionName in iface_dict: |
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44 raise exceptions.ConflictError( |
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45 u"signal {name} is already regitered for interface {iface}".format( |
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46 name=functionName, iface=iface |
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47 ) |
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48 ) |
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49 iface_dict[functionName] = handler |
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50 |
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51 def call_method(self, name, out_sign, async_, args, kwargs): |
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52 callback = kwargs.pop("callback", None) |
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53 errback = kwargs.pop("errback", None) |
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54 if async_: |
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55 d = self._methods_cbs[name](*args, **kwargs) |
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56 if callback is not None: |
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57 d.addCallback(callback if out_sign else lambda __: callback()) |
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58 if errback is None: |
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59 d.addErrback(lambda failure_: log.error(failure_)) |
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60 else: |
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61 d.addErrback(errback) |
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62 return d |
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63 else: |
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64 try: |
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65 ret = self._methods_cbs[name](*args, **kwargs) |
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66 except Exception as e: |
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67 if errback is not None: |
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68 errback(e) |
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69 else: |
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70 raise e |
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71 else: |
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72 if callback is None: |
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73 return ret |
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74 else: |
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75 if out_sign: |
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76 callback(ret) |
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77 else: |
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78 callback() |
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79 |
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80 def send_signal(self, name, args, kwargs): |
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81 try: |
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82 cb = self._signals_cbs["plugin"][name] |
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83 except KeyError: |
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84 log.debug(u"ignoring signal {}: no callback registered".format(name)) |
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85 else: |
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86 cb(*args, **kwargs) |
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87 |
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88 def addMethod(self, name, int_suffix, in_sign, out_sign, method, async=False, doc={}): |
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89 # FIXME: doc parameter is kept only temporary, the time to remove it from calls |
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90 log.debug("Adding method [{}] to embedded bridge".format(name)) |
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91 self.register_method(name, method) |
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92 setattr( |
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93 self.__class__, |
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94 name, |
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95 lambda self_, *args, **kwargs: self.call_method( |
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96 name, out_sign, async, args, kwargs |
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97 ), |
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98 ) |
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99 |
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100 def addSignal(self, name, int_suffix, signature, doc={}): |
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101 setattr( |
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102 self.__class__, |
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103 name, |
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104 lambda self_, *args, **kwargs: self.send_signal(name, args, kwargs), |
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105 ) |
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106 |
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107 ## signals ## |
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108 |
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109 |
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110 ##SIGNALS_PART## |
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111 ## methods ## |
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112 |
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113 ##METHODS_PART## |
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114 |
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115 # we want the same instance for both core and frontend |
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116 bridge = None |
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117 |
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118 |
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119 def Bridge(): |
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120 global bridge |
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121 if bridge is None: |
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122 bridge = _Bridge() |
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123 return bridge |