class SharedObjectService(INamed):
'''
This class provide a facade for managing SharedObjects
'''
def __init__(self, name='SharedObjectSrv'):
'''
@param name: The unique name of the service
'''
self._shared_objects = Case().tag(name).tag(SharedObject.__name__)
INamed.__init__(self, name)
def register_in(self, dispatcher):
dispatcher.add_method(self.new_shared_object)
dispatcher.add_method(self.expose_shared_object)
dispatcher.add_method(self.del_shared_object)
dispatcher.add_method(self.clear)
dispatcher.add_method(self.push)
# SharedObject properties
dispatcher.add_method(partial(self._proxy_property, 'name'), 'name')
dispatcher.add_method(partial(self._proxy_property, 'grammar'), 'grammar')
# SharedObject methods
dispatcher.add_method(partial(self._proxy, 'pull'), 'pull')
def _proxy(self, method, shared_object_oid, *args, **kwargs):
shared_object = self._shared_objects[shared_object_oid]
result = shared_object.__getattribute__(method)(*args, **kwargs)
return result
def _proxy_property(self, method, shared_object_oid):
shared_object = self._shared_objects[shared_object_oid]
result = shared_object.__getattribute__(method)
return result
def push(self, oid, data, version):
'''
:param oid: The SharedObject oid
:param data: list or dict. The updated data.
:param version: This should be the returned by pull or push methods.
:returns: tuple(conflict_ocurred, new_version)
conflict_ocurred: True if provided version is older than current
False otherwise
new_version: The version generated after the modification.
Becomes the current one.
'''
shared_object = self._shared_objects[oid]
conflict = False
try:
new_version = shared_object.push(data, version)
except VersionError:
conflict = True
new_version = None
return (conflict, new_version)
def new_shared_object(self, name, data, prefix=''):
'''
:param str name: If a name is not provided, an uuid is generated
:param data: A dict or list
:param str prefix: Prepended to the name creates the oid
'''
new_shared_object = SharedObject(name, data, prefix=prefix)
self._shared_objects[new_shared_object.oid] = new_shared_object
return new_shared_object
def expose_shared_object(self, shared_object):
self._shared_objects[shared_object.oid] = shared_object
return shared_object
def del_shared_object(self, oid):
self._shared_objects.pop(oid)
def clear(self):
self._shared_objects.clear()
def __getattr__(self, method):
if method in ['name', 'grammar']:
return partial(self._proxy_property, method)
else:
return partial(self._proxy, method)
class DynFilterService(INamed):
'''
This class provide a facade for managing DynFilter objects
'''
def __init__(self, name='DynFilterSrv', condition_srv_name='ConditionSrv'):
'''
@param name: The unique name of the service
'''
self._dfilters = Case().tag(name).tag(DynFilter.__name__)
self._conditions = Showcase.instance().get_case(condition_srv_name)
INamed.__init__(self, name)
def register_in(self, dispatcher):
dispatcher.add_method(self.new_dfilter)
dispatcher.add_method(self.expose_dfilter)
dispatcher.add_method(self.del_dfilter)
dispatcher.add_method(self.clear)
# DynFilter Methods
dispatcher.add_method(partial(self._proxy, 'new_categorical_condition'), 'new_categorical_condition')
dispatcher.add_method(partial(self._proxy, 'new_attribute_condition'), 'new_attribute_condition')
dispatcher.add_method(partial(self._proxy, 'new_range_condition'), 'new_range_condition')
dispatcher.add_method(partial(self._proxy, 'new_query_condition'), 'new_query_condition')
# ConditionSet Methods
dispatcher.add_method(partial(self._proxy, 'add_condition'), 'add_condition')
dispatcher.add_method(partial(self._proxy, 'set_condition'), 'set_condition')
dispatcher.add_method(partial(self._proxy, 'update'), 'update')
dispatcher.add_method(partial(self._proxy, 'remove_condition'), 'remove_condition')
dispatcher.add_method(partial(self._proxy, 'has_condition'), 'has_condition')
dispatcher.add_method(partial(self._proxy, 'get_condition'), 'get_condition')
dispatcher.add_method(partial(self._proxy, 'get_conditions'), 'get_conditions')
# ConditionSet Properties
dispatcher.add_method(partial(self._proxy_property, 'name'), 'name')
dispatcher.add_method(partial(self._proxy_property, 'grammar'), 'grammar')
dispatcher.add_method(partial(self._proxy_property, 'grammar_of_conditions'), 'grammar_of_conditions')
dispatcher.add_method(partial(self._proxy_property, 'reference'), 'reference')
dispatcher.add_method(partial(self._proxy_property, 'projection'), 'projection')
dispatcher.add_method(partial(self._proxy_property, 'query'), 'query')
dispatcher.add_method(partial(self._proxy_property, 'view_args'), 'view_args')
def _proxy(self, method, dfilter_oid, *args, **kwargs):
dfilter = self._dfilters[dfilter_oid]
result = dfilter.__getattribute__(method)(*args, **kwargs)
if isinstance(result, Condition):
self._conditions[result.oid] = result
return result
def _proxy_property(self, method, dfilter_oid):
dfilter = self._dfilters[dfilter_oid]
result = dfilter.__getattribute__(method)
if isinstance(result, Condition):
self._conditions[result.oid] = result
return result
def new_dfilter(self, name, data, setop='AND', prefix=''):
dataset = Showcase.instance().get(data)
new_dfilter = DynFilter(name, dataset, setop, prefix=prefix)
self._dfilters[new_dfilter.oid] = new_dfilter
return new_dfilter
def expose_dfilter(self, dfilter):
self._dfilters[dfilter.oid] = dfilter
return dfilter
def del_dfilter(self, oid):
self._dfilters.pop(oid)
def clear(self):
self._dfilters.clear()
self._conditions.clear()
