Drone.Swarm.Supervisor (ex_drone v0.2.0)

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Dynamic supervisor for Drone.Swarm coordinator processes.

Vehicles remain under Drone.Supervisor. This supervisor only owns swarm coordinators so a swarm crash does not restart vehicle children (and vice versa).

Started automatically by the application supervisor as Drone.Swarm.Supervisor.

Example

Prefer Drone.Swarm.start/1, which uses this supervisor:

{:ok, swarm} =
  Drone.Swarm.start(
    name: :demo,
    members: [{:a, adapter: :sim}, {:b, adapter: :sim}]
  )

Summary

Functions

child_spec(arg)

Returns a specification to start this module under a supervisor.

init(opts)

Initializes the supervisor with a :one_for_one strategy.

start_link(opts \\ [])

Starts the swarm dynamic supervisor (named Drone.Swarm.Supervisor).

start_swarm(opts)

Starts a Drone.Swarm child under this supervisor.

stop_swarm(pid)

Terminates a swarm coordinator by pid.

Functions

child_spec(arg)

Returns a specification to start this module under a supervisor.

See Supervisor.

init(opts)

Initializes the supervisor with a :one_for_one strategy.

Parameters

  • _opts (term()) — start options (ignored)

Returns

{:ok, DynamicSupervisor.sup_flags()}

start_link(opts \\ [])

@spec start_link(keyword()) :: GenServer.on_start()

Starts the swarm dynamic supervisor (named Drone.Swarm.Supervisor).

Parameters

Returns

Standard GenServer.on_start() result.

Example

# Child of the OTP application:
# {Drone.Swarm.Supervisor, []}

start_swarm(opts)

@spec start_swarm(keyword()) :: DynamicSupervisor.on_start_child()

Starts a Drone.Swarm child under this supervisor.

Prefer Drone.Swarm.start/1, which wraps this call and returns a swarm handle (name or pid).

Parameters

  • opts (keyword()) — normalized swarm options including :members

Returns

DynamicSupervisor.on_start_child() — typically {:ok, pid} or {:error, reason}.

Example

{:ok, pid} =
  Drone.Swarm.Supervisor.start_swarm(
    name: :patrol,
    members: [{:a, adapter: :sim}, {:b, adapter: :sim}]
  )

stop_swarm(pid)

@spec stop_swarm(pid()) :: :ok | {:error, :not_found}

Terminates a swarm coordinator by pid.

Because the swarm traps exits, termination runs Drone.Swarm cleanup and disconnects members by default (same as Drone.Swarm.stop/1). Prefer Drone.Swarm.stop/2 when you need disconnect: false.

Parameters

  • pid (pid()) — swarm process id

Returns

  • :ok
  • {:error, :not_found}

Example

:ok = Drone.Swarm.Supervisor.stop_swarm(pid)