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|
use std::fmt;
use crate::PeerID;
use karyon_core::pubsub::{ArcPublisher, Publisher, Subscription};
use karyon_net::Endpoint;
/// Responsible for network and system monitoring.
///
/// It use pub-sub pattern to notify the subscribers with new events.
///
/// # Example
///
/// ```
/// use std::sync::Arc;
///
/// use smol::Executor;
///
/// use karyon_core::crypto::{KeyPair, KeyPairType};
/// use karyon_p2p::{Config, Backend, PeerID};
///
/// async {
///
/// // Create a new Executor
/// let ex = Arc::new(Executor::new());
///
/// let key_pair = KeyPair::generate(&KeyPairType::Ed25519);
/// let backend = Backend::new(&key_pair, Config::default(), ex.into());
///
/// // Create a new Subscription
/// let sub = backend.monitor().await;
///
/// let event = sub.recv().await;
/// };
/// ```
pub struct Monitor {
inner: ArcPublisher<MonitorEvent>,
}
impl Monitor {
/// Creates a new Monitor
pub(crate) fn new() -> Monitor {
Self {
inner: Publisher::new(),
}
}
/// Sends a new monitor event to all subscribers.
pub async fn notify(&self, event: &MonitorEvent) {
self.inner.notify(event).await;
}
/// Subscribes to listen to new events.
pub async fn subscribe(&self) -> Subscription<MonitorEvent> {
self.inner.subscribe().await
}
}
/// Defines various type of event that can be monitored.
#[derive(Clone, Debug)]
pub enum MonitorEvent {
Conn(ConnEvent),
PeerPool(PeerPoolEvent),
Discovery(DiscoveryEvent),
}
/// Defines connection-related events.
#[derive(Clone, Debug)]
pub enum ConnEvent {
Connected(Endpoint),
ConnectRetried(Endpoint),
ConnectFailed(Endpoint),
Accepted(Endpoint),
AcceptFailed,
Disconnected(Endpoint),
Listening(Endpoint),
ListenFailed(Endpoint),
}
/// Defines `PeerPool` events.
#[derive(Clone, Debug)]
pub enum PeerPoolEvent {
NewPeer(PeerID),
RemovePeer(PeerID),
}
/// Defines `Discovery` events.
#[derive(Clone, Debug)]
pub enum DiscoveryEvent {
LookupStarted(Endpoint),
LookupFailed(Endpoint),
LookupSucceeded(Endpoint, usize),
RefreshStarted,
}
impl fmt::Display for MonitorEvent {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let val = match self {
MonitorEvent::Conn(e) => format!("Connection Event: {e}"),
MonitorEvent::PeerPool(e) => format!("PeerPool Event: {e}"),
MonitorEvent::Discovery(e) => format!("Discovery Event: {e}"),
};
write!(f, "{}", val)
}
}
impl fmt::Display for ConnEvent {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let val = match self {
ConnEvent::Connected(endpoint) => format!("Connected: {endpoint}"),
ConnEvent::ConnectFailed(endpoint) => format!("ConnectFailed: {endpoint}"),
ConnEvent::ConnectRetried(endpoint) => format!("ConnectRetried: {endpoint}"),
ConnEvent::AcceptFailed => "AcceptFailed".to_string(),
ConnEvent::Accepted(endpoint) => format!("Accepted: {endpoint}"),
ConnEvent::Disconnected(endpoint) => format!("Disconnected: {endpoint}"),
ConnEvent::Listening(endpoint) => format!("Listening: {endpoint}"),
ConnEvent::ListenFailed(endpoint) => format!("ListenFailed: {endpoint}"),
};
write!(f, "{}", val)
}
}
impl fmt::Display for PeerPoolEvent {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let val = match self {
PeerPoolEvent::NewPeer(pid) => format!("NewPeer: {pid}"),
PeerPoolEvent::RemovePeer(pid) => format!("RemovePeer: {pid}"),
};
write!(f, "{}", val)
}
}
impl fmt::Display for DiscoveryEvent {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let val = match self {
DiscoveryEvent::LookupStarted(endpoint) => format!("LookupStarted: {endpoint}"),
DiscoveryEvent::LookupFailed(endpoint) => format!("LookupFailed: {endpoint}"),
DiscoveryEvent::LookupSucceeded(endpoint, len) => {
format!("LookupSucceeded: {endpoint} {len}")
}
DiscoveryEvent::RefreshStarted => "RefreshStarted".to_string(),
};
write!(f, "{}", val)
}
}
impl From<ConnEvent> for MonitorEvent {
fn from(val: ConnEvent) -> Self {
MonitorEvent::Conn(val)
}
}
impl From<PeerPoolEvent> for MonitorEvent {
fn from(val: PeerPoolEvent) -> Self {
MonitorEvent::PeerPool(val)
}
}
impl From<DiscoveryEvent> for MonitorEvent {
fn from(val: DiscoveryEvent) -> Self {
MonitorEvent::Discovery(val)
}
}
|
