Mercurial > libervia-backend
view sat/bridge/bridge_constructor/constructors/embedded/embedded_template.py @ 3153:2c7b42f53e9a
core (xmpp): avoid starting several clients at the same time:
a check is done to avoid running startConnection several times at once, which would lead
to the creation of several SatXMPPEntity instances at the same time, resulting in many
issues.
If startConnection is called while a previous one is not finished yet, a CancelError is
now raised.
author | Goffi <goffi@goffi.org> |
---|---|
date | Mon, 03 Feb 2020 13:46:24 +0100 |
parents | 559a625a236b |
children | be6d91572633 |
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#!/usr/bin/env python3 # SàT: a XMPP client # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from sat.core.log import getLogger log = getLogger(__name__) from sat.core import exceptions class _Bridge(object): def __init__(self): log.debug("Init embedded bridge...") self._methods_cbs = {} self._signals_cbs = {"core": {}, "plugin": {}} def bridgeConnect(self, callback, errback): callback() def register_method(self, name, callback): log.debug("registering embedded bridge method [{}]".format(name)) if name in self._methods_cbs: raise exceptions.ConflictError("method {} is already regitered".format(name)) self._methods_cbs[name] = callback def register_signal(self, functionName, handler, iface="core"): iface_dict = self._signals_cbs[iface] if functionName in iface_dict: raise exceptions.ConflictError( "signal {name} is already regitered for interface {iface}".format( name=functionName, iface=iface ) ) iface_dict[functionName] = handler def call_method(self, name, out_sign, async_, args, kwargs): callback = kwargs.pop("callback", None) errback = kwargs.pop("errback", None) if async_: d = self._methods_cbs[name](*args, **kwargs) if callback is not None: d.addCallback(callback if out_sign else lambda __: callback()) if errback is None: d.addErrback(lambda failure_: log.error(failure_)) else: d.addErrback(errback) return d else: try: ret = self._methods_cbs[name](*args, **kwargs) except Exception as e: if errback is not None: errback(e) else: raise e else: if callback is None: return ret else: if out_sign: callback(ret) else: callback() def send_signal(self, name, args, kwargs): try: cb = self._signals_cbs["plugin"][name] except KeyError: log.debug("ignoring signal {}: no callback registered".format(name)) else: cb(*args, **kwargs) def addMethod(self, name, int_suffix, in_sign, out_sign, method, async_=False, doc={}): # FIXME: doc parameter is kept only temporary, the time to remove it from calls log.debug("Adding method [{}] to embedded bridge".format(name)) self.register_method(name, method) setattr( self.__class__, name, lambda self_, *args, **kwargs: self.call_method( name, out_sign, async_, args, kwargs ), ) def addSignal(self, name, int_suffix, signature, doc={}): setattr( self.__class__, name, lambda self_, *args, **kwargs: self.send_signal(name, args, kwargs), ) ## signals ## ##SIGNALS_PART## ## methods ## ##METHODS_PART## # we want the same instance for both core and frontend bridge = None def Bridge(): global bridge if bridge is None: bridge = _Bridge() return bridge