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from . import interfaces import inspect import tuned.patterns class ExportsController(tuned.patterns.Singleton): """ Controls and manages object interface exporting. """ def __init__(self): super(ExportsController, self).__init__() self._exporters = [] self._objects = [] self._exports_initialized = False def register_exporter(self, instance): """Register objects exporter.""" self._exporters.append(instance) def register_object(self, instance): """Register object to be exported.""" self._objects.append(instance) def _is_exportable_method(self, method): """Check if method was marked with @exports.export wrapper.""" return inspect.ismethod(method) and hasattr(method, "export_params") def _is_exportable_signal(self, method): """Check if method was marked with @exports.signal wrapper.""" return inspect.ismethod(method) and hasattr(method, "signal_params") def _is_exportable_getter(self, method): """Check if method was marked with @exports.get_property wrapper.""" return inspect.ismethod(method) and hasattr(method, "property_get_params") def _is_exportable_setter(self, method): """Check if method was marked with @exports.set_property wrapper.""" return inspect.ismethod(method) and hasattr(method, "property_set_params") def _export_method(self, method): """Register method to all exporters.""" for exporter in self._exporters: args = method.export_params[0] kwargs = method.export_params[1] exporter.export(method, *args, **kwargs) def _export_signal(self, method): """Register signal to all exporters.""" for exporter in self._exporters: args = method.signal_params[0] kwargs = method.signal_params[1] exporter.signal(method, *args, **kwargs) def _export_getter(self, method): """Register property getter to all exporters.""" for exporter in self._exporters: args = method.property_get_params[0] kwargs = method.property_get_params[1] exporter.property_getter(method, *args, **kwargs) def _export_setter(self, method): """Register property setter to all exporters.""" for exporter in self._exporters: args = method.property_set_params[0] kwargs = method.property_set_params[1] exporter.property_setter(method, *args, **kwargs) def send_signal(self, signal, *args, **kwargs): """Register signal to all exporters.""" for exporter in self._exporters: exporter.send_signal(signal, *args, **kwargs) def property_changed(self, *args, **kwargs): for exporter in self._exporters: exporter.property_changed(*args, **kwargs) def period_check(self): """Allows to perform checks on exporters without special thread.""" for exporter in self._exporters: exporter.period_check() def _initialize_exports(self): if self._exports_initialized: return for instance in self._objects: for name, method in inspect.getmembers(instance, self._is_exportable_method): self._export_method(method) for name, method in inspect.getmembers(instance, self._is_exportable_signal): self._export_signal(method) for name, method in inspect.getmembers(instance, self._is_exportable_getter): self._export_getter(method) for name, method in inspect.getmembers(instance, self._is_exportable_setter): self._export_setter(method) self._exports_initialized = True def start(self): """Start the exports.""" self._initialize_exports() for exporter in self._exporters: exporter.start() def stop(self): """Stop the exports.""" for exporter in self._exporters: exporter.stop()