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//! Event system for inter-component communication.
use tokio::sync::broadcast;
/// System events.
#[derive(Debug, Clone)]
pub enum Event {
/// VM started.
VmStarted { id: String },
/// VM stopped.
VmStopped { id: String },
/// Machine created.
MachineCreated { name: String },
/// Machine started.
MachineStarted { name: String },
/// Machine entered idle state (still running, reduced resources).
MachineIdle { name: String },
/// Machine stopped.
MachineStopped { name: String },
/// Container subnet route installed on the host for a machine's bridge NIC.
ContainerRouteInstalled { name: String },
}
/// Event bus for system-wide event distribution.
#[derive(Clone)]
pub struct EventBus {
sender: broadcast::Sender<Event>,
}
impl EventBus {
/// Creates a new event bus.
#[must_use]
pub fn new() -> Self {
let (sender, _) = broadcast::channel(256);
Self { sender }
}
/// Publishes an event.
pub fn publish(&self, event: Event) {
let _ = self.sender.send(event);
}
/// Subscribes to events.
#[must_use]
pub fn subscribe(&self) -> broadcast::Receiver<Event> {
self.sender.subscribe()
}
}
impl Default for EventBus {
fn default() -> Self {
Self::new()
}
}