SimulationControl Sample

This sample demonstrates how to use the SimulationControl service to start a simulation and monitor its status using SignalR events.

import time
from restmapi.services import MAPIServices

def on_status_changed(new_status):
    print(f"Received StatusChanged event: {new_status}")

# Ensure MAPIServices is initialized (usually done automatically if MAPI is running)
if MAPIServices.instance is None:
    print("MAPI Services not available.")
    exit(1)

# Use the 'with' statement to ensure proper resource cleanup
with MAPIServices.instance.get_service("SimulationControl") as sc:
    print("Connected to SimulationControl service.")

    # Initialize SignalR connection to receive events
    sc.init_signalr()

    # Register the callback for status changes
    sc.register_status_changed_callback(on_status_changed)

    simulation_name = "DC_Motor"
    print(f"Starting simulation '{simulation_name}'...")

    try:
        # Start the simulation
        sc.start_simulation(simulation_name)

        # Keep the script running to listen for events
        # In a real application, you might wait for a specific state (e.g., "Stopped")
        print("Press Ctrl+C to stop the simulation and exit.")
        while True:
            time.sleep(1)

    except KeyboardInterrupt:
        print("\nInterrupted by user.")
    except Exception as e:
        print(f"An error occurred: {e}")
    finally:
        # Attempt to stop the simulation before exiting
        print("Stopping simulation...")
        try:
            sc.stop_simulation()
        except:
            pass