Struct Resources 

pub struct Resources { /* private fields */ }

Container of engine resources — long-lived shared state that is principally data (with at most trivial accessors), not a service.

Admission criteria. A resource lives here when it is principally data with trivial accessors (HashMaps, settings, caches), is shared between several lanes / agents / data systems but has no rich business API, and is long-lived (per-tick state belongs in OutputDeck or LaneContext).

Many resources will internally use Arc<RwLock<…>> or Arc<Mutex<…>> to support concurrent access. That is the resource’s responsibility, not the container’s.

API mirrors the legacy ServiceRegistry (drop-in replacement).

Implementations

impl Resources

pub fn new() -> Resources

Creates an empty container.

pub fn with_parent(parent: Arc<Resources>) -> Resources

Creates a container that delegates lookups to parent when a key is absent locally.

pub fn insert<T>(&mut self, resource: T)

where T: Send + Sync + 'static,

Inserts a resource, keyed by T’s TypeId.

pub fn get<T>(&self) -> Option<&T>

where T: Send + Sync + 'static,

Returns a borrow of the registered resource, walking the parent chain.

pub fn require<T>(&self) -> &T

where T: Send + Sync + 'static,

Returns a borrow of the registered resource, panicking if absent.

pub fn contains<T>(&self) -> bool

where T: Send + Sync + 'static,

Reports whether a resource of the given type is registered.

pub fn len(&self) -> usize

Number of resources registered locally.

pub fn is_empty(&self) -> bool

Whether no resources are registered locally.

Trait Implementations

impl Debug for Resources

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Resources

fn default() -> Resources

Returns the “default value” for a type.