libmuscle.native_instantiator.process_manager module

class libmuscle.native_instantiator.process_manager.ProcessManager

Bases: object

Manages a set of running processes.

cancel_all() → None

Stops all running processes.

This does not wait for them to terminate, it just sends the signal to kill them.

get_finished() → List[Tuple[str, int]]

Returns names and exit codes of finished processes.

This returns all processes that have finished running since the previous call; each started process will be returned exactly once.

start(name: str, work_dir: Path, args: List[str], env: Dict[str, str], stdout: Path, stderr: Path) → None

Start a process.

The files that the output is directed to will be overwritten if they already exist.

Parameters:

• name – Name under which this process will be known

• work_dir – Working directory in which to start

• args – Executable and arguments to run

• env – Environment variables to set

• stdout – File to redirect stdout to

• stderr – File to redirect stderr to

Raises:

• RuntimeError – If there is already a process with the given name.

• OSError – If the process could not be started.