Struct RwContext 

pub struct RwContext(/* private fields */);

Thread-safe context for storing request-scoped data.

RwContext wraps a Context in Arc<RwLock<_>> for safe concurrent access. It can be cloned cheaply and shared across async tasks.

Example

use evento::context::RwContext;

let ctx = RwContext::new();

// Insert data (acquires write lock)
ctx.insert(42u32);

// Get data (acquires read lock, clones the value)
let value: Option<u32> = ctx.get();

// Extract panics if not found (useful for required dependencies)
let value: u32 = ctx.extract();

Panics

Methods will panic if the internal RwLock is poisoned.

Implementations

impl RwContext

pub fn new() -> Self

Creates an empty RwContext.

pub fn insert<T: Send + Sync + 'static>(&self, val: T) -> Option<T>

Insert an item into the map.

If an item of this type was already stored, it will be replaced and returned.

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

Check if map contains an item of a given type.

pub fn extract<T: Clone + 'static>(&self) -> T

Get a clone of an item of a given type, panics if not found.

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

Get a clone of an item of a given type.

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

Remove an item from the map of a given type.

If an item of this type was already stored, it will be returned.

pub fn clear(&self)

Clear the RwContext of all inserted extensions.

pub fn extend(&self, other: Context)

Extends self with the items from another Context.

Trait Implementations

impl Clone for RwContext

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for RwContext

fn default() -> Self

Returns the “default value” for a type.