Struct FetchRegistry 

pub struct FetchRegistry { /* private fields */ }

HTTP plumbing: start requests away from the world thread, marshal the completed reply back onto the ECS/UI thread, and surface it to the script.

Both fetch(url, tag) (simple sugar) and http(#{...}) (general form) flow through this single registry, dispatcher, and completion channel - there is exactly one async delivery mechanism. The worker only ever sends the outcome down the channel; collect_fetch_replies, running on the world thread, moves it into PendingFetchReplies, and fire_fetched_responses is the only place a signal / handler is touched. That worker->UI-thread hand-off mirrors Slint’s invoke_from_event_loop marshalling.

The registry holds the HttpDispatch every request runs on, which in turn holds the HttpClient. A default registry dispatches DisabledHttpClient onto a worker thread, so a build with no client installed answers each request with the “no HTTP client” error instead of hanging or silently dropping it. The runtime installs the client Lumen ships (lumen-http-ureq) with FetchRegistry::with_client before the script plugin builds; an embedder swaps in its own the same way, and a platform with no thread to block swaps the dispatcher itself with FetchRegistry::with_dispatch.

Implementations

impl FetchRegistry

pub fn with_client(client: Arc<dyn HttpClient>) -> Self

Build a registry whose requests run on client, one worker thread per request.

Insert it before the script plugin builds; the plugin only installs its own default when no registry is present.

pub fn with_dispatch(dispatch: Arc<dyn HttpDispatch>) -> Self

Build a registry whose requests run on dispatch, for a platform where a blocked worker thread is not how a request completes.

Trait Implementations

impl Component for FetchRegistry

where Self: Send + Sync + 'static,

const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::SparseSet

A constant indicating the storage type used for this component.

type Mutability = Mutable

A marker type to assist Bevy with determining if this component is mutable, or immutable. Mutable components will have [Component<Mutability = Mutable>], while immutable components will instead have [Component<Mutability = Immutable>].

fn register_required_components( _requiree: ComponentId, required_components: &mut RequiredComponentsRegistrator<'_, '_>, )

Registers required components.

fn clone_behavior() -> ComponentCloneBehavior

Called when registering this component, allowing to override clone function (or disable cloning altogether) for this component.

fn relationship_accessor() -> Option<ComponentRelationshipAccessor<Self>>

Returns [ComponentRelationshipAccessor] required for working with relationships in dynamic contexts.

fn on_add() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_add [ComponentHook] for this [Component] if one is defined.

fn on_insert() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_insert [ComponentHook] for this [Component] if one is defined.

fn on_discard() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_discard [ComponentHook] for this [Component] if one is defined.

fn on_remove() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_remove [ComponentHook] for this [Component] if one is defined.

fn on_despawn() -> Option<for<'w> fn(DeferredWorld<'w>, HookContext)>

Gets the on_despawn [ComponentHook] for this [Component] if one is defined.

fn map_entities<E>(_this: &mut Self, _mapper: &mut E)

where E: EntityMapper,

Maps the entities on this component using the given [EntityMapper]. This is used to remap entities in contexts like scenes and entity cloning. When deriving [Component], this is populated by annotating fields containing entities with #[entities]

impl Default for FetchRegistry

fn default() -> Self

Returns the “default value” for a type.

impl Resource for FetchRegistry

where Self: Send + Sync + 'static,