Struct ExtensionsMap 

pub struct ExtensionsMap { /* private fields */ }

Thread-safe, cloneable storage for arbitrary data keyed by strings Uses type erasure (Any) to support any Send + Sync type

Implementations

impl ExtensionsMap

pub fn new() -> Self

Create a new empty extensions map

pub fn insert<T: Any + Send + Sync + 'static>( &self, key: impl Into<String>, value: T, )

Insert a value into the extensions map

Arguments

• key - The key to store the value under
• value - The value to store (must be Send + Sync + ’static)

Example

ctx.extensions.insert("user_id", 12345u64);
ctx.extensions.insert("claims", jwt_claims);

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

Retrieve a value from the extensions map

Arguments

• key - The key to retrieve

Returns

• Some(Arc<T>) if the key exists and the type matches
• None if the key doesn’t exist or type mismatch occurs

Example

if let Some(user_id) = ctx.extensions.get::<u64>("user_id") {
    println!("User ID: {}", user_id);
}

pub fn contains_key(&self, key: &str) -> bool

Check if a key exists in the extensions map

pub fn remove(&self, key: &str) -> Option<Arc<dyn Any + Send + Sync>>

Remove a value from the extensions map

pub fn clear(&self)

Clear all extensions

pub fn len(&self) -> usize

Get the number of stored extensions

pub fn is_empty(&self) -> bool

Check if the extensions map is empty

Trait Implementations

impl Clone for ExtensionsMap

fn clone(&self) -> ExtensionsMap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtensionsMap

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

Formats the value using the given formatter.

impl Default for ExtensionsMap

fn default() -> Self

Returns the “default value” for a type.