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comparison src/bridge/bridge_constructor/constructors/embedded/constructor.py @ 2087:159250d66407

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bridge (constructor): embedded bridge generator: "embedded" is used to have backend and frontend together in the same process (frontend call backend as a module).
author Goffi <goffi@goffi.org>
date Wed, 05 Oct 2016 22:07:51 +0200
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children 442423faf220
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2086:4633cfcbcccb 2087:159250d66407
1 #!/usr/bin/env python2
2 #-*- coding: utf-8 -*-
3
4 # SàT: a XMPP client
5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
6
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU Affero General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
11
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU Affero General Public License for more details.
16
17 # You should have received a copy of the GNU Affero General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20 from sat.bridge.bridge_constructor import base_constructor
21 # from textwraps import dedent
22
23
24 class EmbeddedConstructor(base_constructor.Constructor):
25 NAME = "embedded"
26 CORE_TEMPLATE = "embedded_template.py"
27 CORE_DEST = "embedded.py"
28 CORE_FORMATS = {
29 'methods': """\
30 def {name}(self, {args}{args_comma}callback=None, errback=None):
31 {ret_routine}
32 """,
33 'signals': """\
34 def {name}(self, {args}):
35 try:
36 cb = self._signals_cbs["{category}"]["{name}"]
37 except KeyError:
38 log.warning(u"ignoring signal {{}}: no callback registered".format({name}))
39 else:
40 cb({args_result})
41 """
42 }
43 FRONTEND_TEMPLATE = "embedded_frontend_template.py"
44 FRONTEND_DEST = CORE_DEST
45 FRONTEND_FORMATS = {}
46
47 def core_completion_method(self, completion, function, default, arg_doc, async_):
48 completion.update({
49 'debug': "" if not self.args.debug else 'log.debug ("%s")\n%s' % (completion['name'], 8 * ' '),
50 'args_result': self.getArguments(function['sig_in'], name=arg_doc),
51 'args_comma': ', ' if function['sig_in'] else '',
52 })
53
54 if async_:
55 completion["cb_or_lambda"] = "callback" if function['sig_out'] else "lambda dummy: callback()"
56 completion["ret_routine"] = """\
57 d = self._methods_cbs["{name}"]({args_result})
58 if callback is not None:
59 d.addCallback({cb_or_lambda})
60 if errback is None:
61 d.addErrback(lambda failure_: log.error(failure_))
62 else:
63 d.addErrback(errback)
64 return d
65 """.format(**completion)
66 else:
67 completion['ret_or_nothing'] = 'ret' if function['sig_out'] else ''
68 completion["ret_routine"] = """\
69 try:
70 ret = self._methods_cbs["{name}"]({args_result})
71 except Exception as e:
72 if errback is not None:
73 errback(e)
74 else:
75 raise e
76 else:
77 if callback is None:
78 return ret
79 else:
80 callback({ret_or_nothing})""".format(**completion)
81
82 def core_completion_signal(self, completion, function, default, arg_doc, async_):
83 completion.update({
84 'args_result': self.getArguments(function['sig_in'], name=arg_doc),
85 })