Struct MultiServiceRegistry 

pub struct MultiServiceRegistry<K: ServiceKey, T: ?Sized> { /* private fields */ }

Registry for keyed services - multiple providers with typed key-based lookup.

Generic mechanism in kernel, typed keys defined in drivers.

Type Safety

Uses K: ServiceKey bound to ensure only proper service keys can be used. The ServiceKey trait provides:

• Compile-time enforcement (arbitrary types rejected)
• Built-in service name for error messages
• Self-documenting API

Example

use reovim_kernel::api::v1::{MultiServiceRegistry, ServiceKey};

// In driver: define typed key implementing ServiceKey
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum VfsScheme { File, Memory, Ssh }

impl ServiceKey for VfsScheme {
    fn service_name() -> &'static str { "VFS" }
}

// In driver: define type alias with typed key
pub type VfsProviderRegistry = MultiServiceRegistry<VfsScheme, dyn VfsDriver>;

// Usage
let registry = VfsProviderRegistry::new();
registry.register(VfsScheme::File, Arc::new(local_fs_provider));
let provider = registry.get(&VfsScheme::File);

Implementations

impl<K: ServiceKey, T: ?Sized + Send + Sync + 'static> MultiServiceRegistry<K, T>

pub fn new() -> Self

Create a new empty keyed service registry.

pub fn register(&self, key: K, provider: Arc<T>)

Register a provider for a typed key.

Replaces any existing provider for the same key.

Arguments

• key - The typed service key
• provider - The provider instance wrapped in Arc

pub fn get(&self, key: &K) -> Option<Arc<T>>

Get provider by typed key.

Returns None if no provider is registered for the key.

pub fn get_required(&self, key: &K) -> Arc<T>

where K: Debug,

Get required provider or panic.

Uses K::service_name() for the error message automatically.

Panics

Panics with FATAL: No {service_name} provider for {key:?} if not found.

pub fn keys(&self) -> Vec<K>

List all registered keys.

pub fn values(&self) -> Vec<Arc<T>>

List all registered providers.

pub fn contains(&self, key: &K) -> bool

Check if a provider is registered for the given key.

pub fn len(&self) -> usize

Get the number of registered providers.

pub fn is_empty(&self) -> bool

Check if the registry is empty.

Trait Implementations

impl<K: ServiceKey + Debug, T: ?Sized + Send + Sync + 'static> Debug for MultiServiceRegistry<K, T>

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

Formats the value using the given formatter.

impl<K: ServiceKey, T: ?Sized + Send + Sync + 'static> Default for MultiServiceRegistry<K, T>

fn default() -> Self

Returns the “default value” for a type.

impl<K: ServiceKey, T: ?Sized + Send + Sync + 'static> Service for MultiServiceRegistry<K, T>