Mercurial > libervia-backend

annotate src/bridge/bridge_constructor/dbus_frontend_template.py @ 1487:0df627d0b4ca

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
tools (xmlui): changeContainer do not create a new one when the current one already fits
author souliane <souliane@mailoo.org>
date Fri, 21 Aug 2015 14:58:42 +0200
parents 069ad98b360d
children d17772b0fe22
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
1 #!/usr/bin/python
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
2 #-*- coding: utf-8 -*-
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
3
609
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
4 # SAT communication bridge
1396
069ad98b360d 2015 copyright dates update
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org)
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
6
609
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
7 # This program is free software: you can redistribute it and/or modify
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
8 # it under the terms of the GNU Affero General Public License as published by
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
9 # the Free Software Foundation, either version 3 of the License, or
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
10 # (at your option) any later version.
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
11
609
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
12 # This program is distributed in the hope that it will be useful,
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
15 # GNU Affero General Public License for more details.
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
16
609
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
17 # You should have received a copy of the GNU Affero General Public License
84a6e83157c2 fixed licences in docstrings (they are now in comments)
Goffi <goffi@goffi.org>
parents: 595
diff changeset
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
19
771
bfabeedbf32e core: i18n refactoring:
Goffi <goffi@goffi.org>
parents: 723
diff changeset
20 from sat.core.i18n import _
1062
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
21 from bridge_frontend import BridgeFrontend, BridgeException
535
790be337cc41 bridge: fixed D-Bus warning in frontend side of bridge
Goffi <goffi@goffi.org>
parents: 480
diff changeset
22 import dbus
993
301b342c697a core: use of the new core.log module:
Goffi <goffi@goffi.org>
parents: 811
diff changeset
23 from sat.core.log import getLogger
301b342c697a core: use of the new core.log module:
Goffi <goffi@goffi.org>
parents: 811
diff changeset
24 log = getLogger(__name__)
627
d207c2186519 core, bridge, jp, quick_frontend: SàT stop more gracefully if bridge can't be initialised:
Goffi <goffi@goffi.org>
parents: 609
diff changeset
25 from sat.core.exceptions import BridgeExceptionNoService, BridgeInitError
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
26
535
790be337cc41 bridge: fixed D-Bus warning in frontend side of bridge
Goffi <goffi@goffi.org>
parents: 480
diff changeset
27 from dbus.mainloop.glib import DBusGMainLoop
790be337cc41 bridge: fixed D-Bus warning in frontend side of bridge
Goffi <goffi@goffi.org>
parents: 480
diff changeset
28 DBusGMainLoop(set_as_default=True)
790be337cc41 bridge: fixed D-Bus warning in frontend side of bridge
Goffi <goffi@goffi.org>
parents: 480
diff changeset
29
1073
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
30 import ast
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
31
595
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
32 const_INT_PREFIX = "org.goffi.SAT" # Interface prefix
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
33 const_ERROR_PREFIX = const_INT_PREFIX + ".error"
359
eb9d33ba4e36 bridge: templates' constants can now be overrided
Goffi <goffi@goffi.org>
parents: 337
diff changeset
34 const_OBJ_PATH = '/org/goffi/SAT/bridge'
371
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
35 const_CORE_SUFFIX = ".core"
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
36 const_PLUGIN_SUFFIX = ".plugin"
1072
d123d61976c8 bridge (D-Bus): frontend side now use a 120 s timeout for async calls
Goffi <goffi@goffi.org>
parents: 1062
diff changeset
37 const_TIMEOUT = 120
359
eb9d33ba4e36 bridge: templates' constants can now be overrided
Goffi <goffi@goffi.org>
parents: 337
diff changeset
38
595
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
39
1062
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
40 def dbus_to_bridge_exception(dbus_e):
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
41 """Convert a DBusException to a BridgeException.
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
42
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
43 @param dbus_e (DBusException)
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
44 @return: BridgeException
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
45 """
1188
bf2927e6a0f5 frontends (dbus): error is not truncated anymore if it's not a SàT error.
Goffi <goffi@goffi.org>
parents: 1073
diff changeset
46 full_name = dbus_e.get_dbus_name()
bf2927e6a0f5 frontends (dbus): error is not truncated anymore if it's not a SàT error.
Goffi <goffi@goffi.org>
parents: 1073
diff changeset
47 if full_name.startswith(const_ERROR_PREFIX):
bf2927e6a0f5 frontends (dbus): error is not truncated anymore if it's not a SàT error.
Goffi <goffi@goffi.org>
parents: 1073
diff changeset
48 name = dbus_e.get_dbus_name()[len(const_ERROR_PREFIX) + 1:]
bf2927e6a0f5 frontends (dbus): error is not truncated anymore if it's not a SàT error.
Goffi <goffi@goffi.org>
parents: 1073
diff changeset
49 else:
bf2927e6a0f5 frontends (dbus): error is not truncated anymore if it's not a SàT error.
Goffi <goffi@goffi.org>
parents: 1073
diff changeset
50 name = full_name
1073
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
51 # XXX: dbus_e.args doesn't contain the original DBusException args, but we
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
52 # receive its serialized form in dbus_e.args[0]. From that we can rebuild
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
53 # the original arguments list thanks to ast.literal_eval (secure eval).
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
54 message = dbus_e.get_dbus_message() # similar to dbus_e.args[0]
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
55 try:
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
56 message, condition = ast.literal_eval(message)
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
57 except (SyntaxError, ValueError, TypeError):
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
58 condition = ''
f094583732de bridge: DBusException also transports the twisted failure condition
souliane <souliane@mailoo.org>
parents: 1072
diff changeset
59 return BridgeException(name, message, condition)
1062
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
60
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
61
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
62 class DBusBridgeFrontend(BridgeFrontend):
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
63 def __init__(self):
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
64 try:
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
65 self.sessions_bus = dbus.SessionBus()
359
eb9d33ba4e36 bridge: templates' constants can now be overrided
Goffi <goffi@goffi.org>
parents: 337
diff changeset
66 self.db_object = self.sessions_bus.get_object(const_INT_PREFIX,
595
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
67 const_OBJ_PATH)
371
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
68 self.db_core_iface = dbus.Interface(self.db_object,
595
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
69 dbus_interface=const_INT_PREFIX + const_CORE_SUFFIX)
371
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
70 self.db_plugin_iface = dbus.Interface(self.db_object,
595
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
71 dbus_interface=const_INT_PREFIX + const_PLUGIN_SUFFIX)
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
72 except dbus.exceptions.DBusException, e:
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
73 if e._dbus_error_name == 'org.freedesktop.DBus.Error.ServiceUnknown':
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
74 raise BridgeExceptionNoService
627
d207c2186519 core, bridge, jp, quick_frontend: SàT stop more gracefully if bridge can't be initialised:
Goffi <goffi@goffi.org>
parents: 609
diff changeset
75 elif e._dbus_error_name == 'org.freedesktop.DBus.Error.NotSupported':
993
301b342c697a core: use of the new core.log module:
Goffi <goffi@goffi.org>
parents: 811
diff changeset
76 log.error(_(u"D-Bus is not launched, please see README to see instructions on how to launch it"))
627
d207c2186519 core, bridge, jp, quick_frontend: SàT stop more gracefully if bridge can't be initialised:
Goffi <goffi@goffi.org>
parents: 609
diff changeset
77 raise BridgeInitError
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
78 else:
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
79 raise e
371
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
80 #props = self.db_core_iface.getProperties()
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
81
371
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
82 def register(self, functionName, handler, iface="core"):
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
83 if iface == "core":
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
84 self.db_core_iface.connect_to_signal(functionName, handler)
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
85 elif iface == "plugin":
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
86 self.db_plugin_iface.connect_to_signal(functionName, handler)
3ea41a199b36 bridge refactoring: categories are now core and plugin instead of communication and request
Goffi <goffi@goffi.org>
parents: 363
diff changeset
87 else:
993
301b342c697a core: use of the new core.log module:
Goffi <goffi@goffi.org>
parents: 811
diff changeset
88 log.error(_('Unknown interface'))
267
bdcd535e179e Bridge constructor:
Goffi <goffi@goffi.org>
parents:
diff changeset
89
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
90 def __getattribute__(self, name):
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
91 """ usual __getattribute__ if the method exists, else try to find a plugin method """
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
92 try:
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
93 return object.__getattribute__(self, name)
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
94 except AttributeError:
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
95 # The attribute is not found, we try the plugin proxy to find the requested method
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
96
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
97 def getPluginMethod(*args, **kwargs):
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
98 # We first check if we have an async call. We detect this in two ways:
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
99 # - if we have the 'callback' and 'errback' keyword arguments
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
100 # - or if the last two arguments are callable
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
101
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
102 async = False
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
103
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
104 if kwargs:
1290
faa1129559b8 core, frontends: refactoring to base Libervia on QuickFrontend (big mixed commit):
Goffi <goffi@goffi.org>
parents: 1188
diff changeset
105 if 'callback' in kwargs:
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
106 async = True
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
107 _callback = kwargs.pop('callback')
1290
faa1129559b8 core, frontends: refactoring to base Libervia on QuickFrontend (big mixed commit):
Goffi <goffi@goffi.org>
parents: 1188
diff changeset
108 _errback = kwargs.pop('errback', lambda failure: log.error(unicode(failure)))
595
1f160467f5de Fix pep8 support in src/bridge.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 587
diff changeset
109 elif len(args) >= 2 and callable(args[-1]) and callable(args[-2]):
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
110 async = True
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
111 args = list(args)
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
112 _errback = args.pop()
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
113 _callback = args.pop()
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
114
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
115 method = getattr(self.db_plugin_iface, name)
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
116
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
117 if async:
1072
d123d61976c8 bridge (D-Bus): frontend side now use a 120 s timeout for async calls
Goffi <goffi@goffi.org>
parents: 1062
diff changeset
118 kwargs['timeout'] = const_TIMEOUT
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
119 kwargs['reply_handler'] = _callback
1062
95758ef3faa8 bridge: async failures are more detailed (full class name + error message)
souliane <souliane@mailoo.org>
parents: 993
diff changeset
120 kwargs['error_handler'] = lambda err: _errback(dbus_to_bridge_exception(err))
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
121
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
122 return method(*args, **kwargs)
587
952322b1d490 Remove trailing whitespaces.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 572
diff changeset
123
568
239abc5484c9 bridge: generic plugin methods handling for frontend side in D-Bus Bridge \o/
Goffi <goffi@goffi.org>
parents: 562
diff changeset
124 return getPluginMethod
1290
faa1129559b8 core, frontends: refactoring to base Libervia on QuickFrontend (big mixed commit):
Goffi <goffi@goffi.org>
parents: 1188
diff changeset
125
723
f02e2c277f0c bridge: fixed bridge_constructor
Goffi <goffi@goffi.org>
parents: 709
diff changeset
126 ##METHODS_PART##