def create_index_request(self, app_id, http_request_data): """ High level function for creating composite indexes. Args: app_id: Name of the application. http_request_data: Stores the protocol buffer request from the AppServer. Returns: Returns an encoded response. """ global datastore_access request = entity_pb.CompositeIndex(http_request_data) response = api_base_pb.Integer64Proto() if READ_ONLY: logger.warning('Unable to create in read-only mode: {}'.format(request)) raise gen.Return( ('', datastore_pb.Error.CAPABILITY_DISABLED, 'Datastore is in read-only mode.')) try: index_id = yield datastore_access.create_composite_index(app_id, request) response.set_value(index_id) except dbconstants.AppScaleDBConnectionError as error: logger.exception('DB connection error during index creation') raise gen.Return(('', datastore_pb.Error.INTERNAL_ERROR, str(error))) raise gen.Return((response.Encode(), 0, ''))
def CreateIndex(index): """Creates a new composite index in the datastore for this app. Args: index: entity_pb.CompositeIndex Returns: int, the id allocated to the index """ resp = api_base_pb.Integer64Proto() resp = _Call('CreateIndex', index, resp) return resp.value()
def _SetupIndexes(self, _open=open): """Ensure that the set of existing composite indexes matches index.yaml. Create any new indexes, and delete indexes which are no longer required. Args: _open: Function used to open a file. """ if not self.__root_path: logging.warning("No index.yaml was loaded.") return index_yaml_file = os.path.join(self.__root_path, 'index.yaml') if (self.__cached_yaml[0] == index_yaml_file and os.path.exists(index_yaml_file) and os.path.getmtime(index_yaml_file) == self.__cached_yaml[1]): requested_indexes = self.__cached_yaml[2] else: try: index_yaml_mtime = os.path.getmtime(index_yaml_file) fh = _open(index_yaml_file, 'r') except (OSError, IOError): logging.info("Error reading file") index_yaml_data = None else: try: index_yaml_data = fh.read() finally: fh.close() requested_indexes = [] if index_yaml_data is not None: index_defs = datastore_index.ParseIndexDefinitions( index_yaml_data) if index_defs is not None and index_defs.indexes is not None: requested_indexes = datastore_index.IndexDefinitionsToProtos( self.__app_id, index_defs.indexes) self.__cached_yaml = (index_yaml_file, index_yaml_mtime, requested_indexes) existing_indexes = datastore_pb.CompositeIndices() app_str = api_base_pb.StringProto() app_str.set_value(self.__app_id) self._Dynamic_GetIndices(app_str, existing_indexes) requested = dict( (x.definition().Encode(), x) for x in requested_indexes) existing = dict((x.definition().Encode(), x) for x in existing_indexes.index_list()) # Delete any indexes that are no longer requested. deleted = 0 for key, index in existing.iteritems(): if key not in requested: self._Dynamic_DeleteIndex(index, api_base_pb.VoidProto()) deleted += 1 # Add existing indexes in the index cache. for key, index in existing.iteritems(): new_index = entity_pb.CompositeIndex() new_index.CopyFrom(index) ent_kind = new_index.definition().entity_type() if ent_kind in self.__index_cache: new_indexes = self.__index_cache[ent_kind] new_indexes.append(new_index) self.__index_cache[ent_kind] = new_indexes else: self.__index_cache[ent_kind] = [new_index] # Compared the existing indexes to the requested ones and create any # new indexes requested. created = 0 for key, index in requested.iteritems(): if key not in existing: new_index = entity_pb.CompositeIndex() new_index.CopyFrom(index) new_index.set_id( self._Dynamic_CreateIndex( new_index, api_base_pb.Integer64Proto()).value()) new_index.set_state(entity_pb.CompositeIndex.READ_WRITE) self._Dynamic_UpdateIndex(new_index, api_base_pb.VoidProto()) created += 1 ent_kind = new_index.definition().entity_type() if ent_kind in self.__index_cache: new_indexes = self.__index_cache[ent_kind] new_indexes.append(new_index) self.__index_cache[ent_kind] = new_indexes else: self.__index_cache[ent_kind] = [new_index] if created or deleted: logging.info('Created %d and deleted %d index(es); total %d', created, deleted, len(requested))