def tile(self, project: str, filename: str, truncate: bool = False) -> None: absolute_path = self.list.absolute_file_path(project, filename) ds = None if absolute_path is not "": try: lock = self.connections.dataset_locks.get(absolute_path) if lock is not None and lock.acquire(blocking=True, timeout=10): ds = LoomConnection(absolute_path, 'r') tiles = LoomTiles(ds) tiles.prepare_heatmap(truncate) ds.close() lock.release() except TimeoutError: # May happen when cancelled by the environment (for example, on a server). # If so, and the lock was acquired, release the dataset and lock if ds is not None: ds.close() lock.release() pass
def connect(self, project: str, filename: str, mode: str="r+", timeout: float=10) -> LoomConnection: """ Try to connect to a local loom file. If returns None already connected. Uses a semaphore to ensure there is never more than one connection open to a loom file (as long as this is the only object that connects to the loom file) Remember to call `release(project, filename)` after closing the connection! Args: - project (string): Name of the project (e.g. "Midbrain") - filename (string): Filename of the loom file (e.g. "Midbrain_20160701.loom") Returns: A loom file connection, or None if file does not exist or was already connected. """ if self.acquire(project, filename, timeout): absolute_path = self.list.absolute_file_path(project, filename) return LoomConnection(absolute_path, mode) return None
