Enum DependencyScope 

pub enum DependencyScope {
    Singleton,
    Request,
    Transient,
}

Scope for dependency injection

Variants

Singleton

Single instance shared across the entire application

Request

New instance per request, cached within the request

Transient

New instance every time, never cached

Implementations

impl DependencyScope

pub fn outlives(&self, dependent: DependencyScope) -> bool

Returns true if a type at scope self (the dependency being resolved) lives at least as long as a type at scope dependent (the type requesting resolution).

The only prohibited combination is a Singleton-scoped dependent resolving a Request-scoped dependency, because the singleton would capture a stale, request-bound value for the entire process lifetime.

Trait Implementations

impl Clone for DependencyScope

fn clone(&self) -> DependencyScope

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DependencyScope

impl Debug for DependencyScope

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

Formats the value using the given formatter.

impl Default for DependencyScope

fn default() -> DependencyScope

Returns the “default value” for a type.

impl Eq for DependencyScope

impl PartialEq for DependencyScope

fn eq(&self, other: &DependencyScope) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for DependencyScope