Struct StateContainer 

pub struct StateContainer { /* private fields */ }

Type-safe application state container.

State is stored by type and can be accessed by handlers through the State<T> extractor.

Implementations

impl StateContainer

pub fn new() -> Self

Creates a new empty state container.

pub fn insert<T: Send + Sync + 'static>(&mut self, value: T)

Inserts a value into the state container.

If a value of the same type already exists, it is replaced.

pub fn insert_any(&mut self, value: Box<dyn Any + Send + Sync>)

Inserts a boxed Any value into the state container.

This is used by the lifespan system to insert type-erased state. The TypeId is obtained from the actual type inside the box.

pub fn get<T: Send + Sync + 'static>(&self) -> Option<Arc<T>>

Gets a reference to a value in the state container.

pub fn contains<T: 'static>(&self) -> bool

Returns true if the state container contains a value of type T.

pub fn len(&self) -> usize

Returns the number of values in the state container.

pub fn is_empty(&self) -> bool

Returns true if the state container is empty.

Trait Implementations

impl Debug for StateContainer

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

Formats the value using the given formatter.

impl Default for StateContainer

fn default() -> StateContainer

Returns the “default value” for a type.