def make_rest_app(
db_filepath: Path,
this_node,
log: Logger = Logger("http-application-layer")
) -> Tuple[Flask, Datastore]:
"""
Creates a REST application and an associated ``Datastore`` object.
Note that the REST app **does not** hold a reference to the datastore;
it is your responsibility to ensure it lives for as long as the app does.
"""
# A trampoline function for the real REST app,
# to ensure that a reference to the node and the datastore object is not held by the app closure.
# One would think that it's enough to only remove a reference to the node,
# but `rest_app` somehow holds a reference to itself, Uroboros-like,
# and will hold the datastore reference if it is created there.
log.info("Starting datastore {}".format(db_filepath))
datastore = Datastore(db_filepath)
rest_app = _make_rest_app(weakref.proxy(datastore), weakref.proxy(this_node), log)
return rest_app, datastore
def get_reencryption_requests(ds: Datastore) -> List[ReencryptionRequest]:
return ds.query_by(ReencryptionRequest)
def get_policy_arrangements(ds: Datastore) -> List[PolicyArrangement]:
return ds.query_by(PolicyArrangement)
def find_policy_arrangements(ds: Datastore) -> DatastoreQueryResult:
return ds.query_by(PolicyArrangement, writeable=True)
def get_work_orders(ds: Datastore) -> List[Workorder]:
return ds.query_by(Workorder)
def find_expired_treasure_maps(ds: Datastore, cutoff: maya.MayaDT) -> DatastoreQueryResult:
return ds.query_by(TreasureMap,
filter_field='expiration',
filter_func=lambda expiration: expiration <= cutoff,
writeable=True)
def find_expired_policies(ds: Datastore, cutoff: maya.MayaDT) -> DatastoreQueryResult:
return ds.query_by(PolicyArrangement,
filter_field='expiration',
filter_func=lambda expiration: expiration <= cutoff,
writeable=True)