Struct event_emitter_rs::EventEmitter

pub struct EventEmitter {
    pub listeners: HashMap<String, Vec<(String, Arc<dyn Fn(Vec<u8>) + Sync + Send + 'static>)>>,
}

Fields

listeners: HashMap<String, Vec<(String, Arc<dyn Fn(Vec<u8>) + Sync + Send + 'static>)>>

Implementations

impl EventEmitter

pub fn new() -> Self

pub fn on<F, T>(&mut self, event: &str, callback: F) -> String where
    T: Deserialize<'de>,
    F: Fn(T) + 'static + Sync + Send, 

Adds an event listener with a callback that will get called whenever the given event is emitted. Returns the id of the newly added listener.

Example

use event_emitter::EventEmitter;
let mut event_emitter = EventEmitter::new();

// This will print <"Hello world!"> whenever the <"Some event"> event is emitted
// type of the value parameter for the closure MUST be specified (here we just use a throwaway `()` type)
event_emitter.on("Some event", |value: ()| println!("Hello world!"));

pub fn emit<T>(&self, event: &str, value: T) where
    T: Serialize, 

Emits an event of the given parameters.

Example

use event_emitter::EventEmitter;
let mut event_emitter = EventEmitter::new();

// Emits the <"Some event"> event and a value <"Hello programmer">
// The value can be of any type
event_emitter.emit("Some event", "Hello programmer!");

pub fn remove_listener(&mut self, id_to_delete: &str) -> Option<String>

Removes an event listener with the given id

Example

use event_emitter::EventEmitter;
let mut event_emitter = EventEmitter::new();
let listener_id = event_emitter.on("Some event", |value: ()| println!("Hello world!"));

// Removes the listener that we just added
event_emitter.remove_listener(&listener_id);

Trait Implementations

impl Default for EventEmitter

fn default() -> EventEmitter

Returns the "default value" for a type.