Struct ExternalStrategy 

pub struct ExternalStrategy { /* private fields */ }

A strategy whose decisions are supplied externally (e.g. from Python).

Each tick it stores the latest Observation and drains any order requests that were previously injected via set_pending_requests. This lets a foreign caller:

1. Call engine.step() which internally calls on_tick – the strategy captures the observation and pushes any pending requests.
2. Read last_observation() to see what the agent observed.
3. Decide on orders, call set_pending_requests(...).
4. Call engine.step() again.

Implementations

impl ExternalStrategy

pub fn new() -> Self

pub fn last_observation(&self) -> Option<&Observation>

Snapshot of the most recent observation delivered to this strategy.

pub fn set_pending_requests(&mut self, requests: Vec<OrderRequest>)

Queue order requests that will be submitted on the next on_tick.

Trait Implementations

impl Default for ExternalStrategy

fn default() -> Self

Returns the “default value” for a type.

impl Strategy for ExternalStrategy

fn on_tick(&mut self, obs: &Observation, requests: &mut Vec<OrderRequest>)

Called each tick with the agent’s filtered observation. Appends order requests (New, Cancel, CancelAll) to the provided buffer.

fn as_any(&self) -> &dyn Any

Downcast helper — returns self as &dyn Any.

fn as_any_mut(&mut self) -> &mut dyn Any

Downcast helper — returns self as &mut dyn Any.