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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()
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