def __init__(
self,
handler_url, # type: Callable[[UsageKey, str, Union[int, ANONYMOUS_USER]], str]
student_data_mode, # type: Union[STUDENT_DATA_EPHEMERAL, STUDENT_DATA_PERSISTED]
runtime_class, # type: XBlockRuntime
):
"""
args:
handler_url: A method to get URLs to call XBlock handlers. It must
implement this signature:
handler_url(
usage_key: UsageKey,
handler_name: str,
user_id: Union[int, str],
)
student_data_mode: Specifies whether student data should be kept
in a temporary in-memory store (e.g. Studio) or persisted
forever in the database.
runtime_class: What runtime to use, e.g. BlockstoreXBlockRuntime
"""
self.handler_url = handler_url
self.id_reader = OpaqueKeyReader()
self.id_generator = MemoryIdManager(
) # We don't really use id_generator until we need to support asides
self.runtime_class = runtime_class
self.authored_data_store = BlockstoreFieldData()
self.children_data_store = BlockstoreChildrenData(
self.authored_data_store)
assert student_data_mode in (self.STUDENT_DATA_EPHEMERAL,
self.STUDENT_DATA_PERSISTED)
self.student_data_mode = student_data_mode
self._error_trackers = {}
def get_runtime_system_params(self):
"""
Get the XBlockRuntimeSystem parameters appropriate for viewing and/or
editing XBlock content in Studio
"""
return dict(
authored_data_store=BlockstoreFieldData(),
student_data_store=KvsFieldData(kvs=DictKeyValueStore()),
)