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//! Types and utilities for dependency injection
use super::error::{Error, ErrorCode};
pub use volga_di::{Container, ContainerBuilder, GenericFactory, Inject};
pub use volga_di::error::Error as DiError;
#[cfg(feature = "server")]
pub use dc::Dc;
#[cfg(feature = "server")]
mod dc;
impl From<DiError> for Error {
#[inline]
fn from(err: DiError) -> Self {
Self::new(ErrorCode::InternalError, err.to_string())
}
}
#[cfg(feature = "server")]
impl super::App {
/// Registers singleton service
///
/// # Example
/// ```no_run
/// use neva::App;
///
/// #[derive(Default, Clone)]
/// struct Singleton;
///
/// let singleton = Singleton::default();
/// App::new()
/// .add_singleton(singleton);
/// ```
pub fn add_singleton<T: Send + Sync + 'static>(mut self, instance: T) -> Self {
self.container.register_singleton(instance);
self
}
/// Registers scoped service
///
/// # Example
/// ```no_run
/// use neva::{App, di::{Container, Inject, DiError}};
///
/// #[derive(Clone)]
/// struct ScopedService;
///
/// impl Inject for ScopedService {
/// fn inject(_: &Container) -> Result<Self, DiError> {
/// Ok(Self)
/// }
/// }
///
/// App::new()
/// .add_scoped::<ScopedService>();
/// ```
pub fn add_scoped<T: Inject + 'static>(mut self) -> Self {
self.container.register_scoped::<T>();
self
}
/// Registers scoped service that required to be resolved via factory
///
/// > **Note:** Provided factory function will be called once per scope
/// > and the result will be available and reused per this scope lifetime.
///
/// # Example
/// ```no_run
/// use neva::App;
///
/// #[derive(Clone)]
/// struct ScopedService;
///
/// impl ScopedService {
/// fn new() -> Self {
/// ScopedService
/// }
/// }
///
/// App::new()
/// .add_scoped_factory(|| ScopedService::new());
/// ```
pub fn add_scoped_factory<T, F, Args>(mut self, factory: F) -> Self
where
T: Send + Sync + 'static,
F: GenericFactory<Args, Output = T>,
Args: Inject,
{
self.container.register_scoped_factory(factory);
self
}
/// Registers scoped service that required to be resolved as [`Default`]
///
/// > **Note:** the [`Default::default`] method will be called once per scope
/// > and the result will be available and reused per this scope lifetime.
///
/// # Example
/// ```no_run
/// use neva::App;
///
/// #[derive(Default, Clone)]
/// struct ScopedService;
///
/// App::new()
/// .add_scoped_default::<ScopedService>();
/// ```
pub fn add_scoped_default<T>(mut self) -> Self
where
T: Default + Send + Sync + 'static,
{
self.container.register_scoped_default::<T>();
self
}
/// Registers transient service
///
/// # Example
/// ```no_run
/// use neva::{App, di::{Container, Inject, DiError}};
///
/// #[derive(Clone)]
/// struct TransientService;
///
/// impl Inject for TransientService {
/// fn inject(_: &Container) -> Result<Self, DiError> {
/// Ok(Self)
/// }
/// }
///
/// App::new()
/// .add_transient::<TransientService>();
/// ```
pub fn add_transient<T: Inject + 'static>(mut self) -> Self {
self.container.register_transient::<T>();
self
}
/// Registers transient service that required to be resolved via factory
///
/// > **Note:** Provided factory function will be called
/// > every time once this service is requested.
///
/// # Example
/// ```no_run
/// use neva::App;
///
/// #[derive(Clone)]
/// struct TransientService;
///
/// impl TransientService {
/// fn new() -> Self {
/// TransientService
/// }
/// }
///
/// App::new()
/// .add_transient_factory(|| TransientService::new());
/// ```
pub fn add_transient_factory<T, F, Args>(mut self, factory: F) -> Self
where
T: Send + Sync + 'static,
F: GenericFactory<Args, Output = T>,
Args: Inject,
{
self.container.register_transient_factory(factory);
self
}
/// Registers transient service that required to be resolved as [`Default`]
///
/// > **Note:** the [`Default::default`] method will be called
/// > every time once this service is requested.
///
/// # Example
/// ```no_run
/// use neva::App;
///
/// #[derive(Default, Clone)]
/// struct TransientService;
///
/// App::new()
/// .add_transient_default::<TransientService>();
/// ```
pub fn add_transient_default<T>(mut self) -> Self
where
T: Default + Send + Sync + 'static,
{
self.container.register_transient_default::<T>();
self
}
}
#[cfg(feature = "server")]
#[cfg(test)]
mod tests {
use super::super::App;
use volga_di::{Container, Inject};
#[derive(Default)]
struct TestDependency;
impl Inject for TestDependency {
fn inject(_: &Container) -> Result<Self, volga_di::error::Error> {
Ok(TestDependency)
}
}
#[test]
fn it_adds_singleton() {
let mut app = App::new();
app = app.add_singleton(TestDependency);
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_scoped() {
let mut app = App::new();
app = app.add_scoped::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_scoped_factory() {
let mut app = App::new();
app = app.add_scoped_factory(|| TestDependency);
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_scoped_default() {
let mut app = App::new();
app = app.add_scoped_default::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_transient() {
let mut app = App::new();
app = app.add_transient::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_transient_factory() {
let mut app = App::new();
app = app.add_transient_factory(|| TestDependency);
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
#[test]
fn it_adds_transient_default() {
let mut app = App::new();
app = app.add_transient_default::<TestDependency>();
let container = app.container.build();
let dep = container.resolve_shared::<TestDependency>();
assert!(dep.is_ok());
}
}