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|
use std::{fmt, sync::Arc};
use karyon_core::event::{ArcEventSys, EventListener, EventSys, EventValue, EventValueTopic};
use karyon_net::Endpoint;
use crate::{Config, PeerID};
/// 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_p2p::{Config, Backend, PeerID, keypair::{KeyPair, KeyPairType}};
///
/// 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 monitor = backend.monitor();
///
/// let listener = monitor.conn_events().await;
///
/// let new_event = listener.recv().await;
/// };
/// ```
pub struct Monitor {
event_sys: ArcEventSys<MonitorTopic>,
config: Arc<Config>,
}
impl Monitor {
/// Creates a new Monitor
pub(crate) fn new(config: Arc<Config>) -> Self {
Self {
event_sys: EventSys::new(),
config,
}
}
/// Sends a new monitor event to subscribers.
pub(crate) async fn notify<E>(&self, event: E)
where
E: EventValue + Clone + EventValueTopic<Topic = MonitorTopic>,
{
if self.config.enable_monitor {
self.event_sys.emit(&event).await
}
}
/// Registers a new event listener for connection events.
pub async fn conn_events(&self) -> EventListener<MonitorTopic, ConnEvent> {
self.event_sys.register(&MonitorTopic::Conn).await
}
/// Registers a new event listener for peer pool events.
pub async fn peer_pool_events(&self) -> EventListener<MonitorTopic, PeerPoolEvent> {
self.event_sys.register(&MonitorTopic::PeerPool).await
}
/// Registers a new event listener for discovery events.
pub async fn discovery_events(&self) -> EventListener<MonitorTopic, DiscoveryEvent> {
self.event_sys.register(&MonitorTopic::Discovery).await
}
}
#[derive(Clone, Debug, Eq, PartialEq, Hash)]
pub enum MonitorTopic {
Conn,
PeerPool,
Discovery,
}
/// 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),
Conn(ConnEvent),
LookupFailed(Endpoint),
LookupSucceeded(Endpoint, usize),
RefreshStarted,
}
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::Conn(event) => format!("Connection event: {event}"),
DiscoveryEvent::LookupFailed(endpoint) => format!("LookupFailed: {endpoint}"),
DiscoveryEvent::LookupSucceeded(endpoint, len) => {
format!("LookupSucceeded: {endpoint} {len}")
}
DiscoveryEvent::RefreshStarted => "RefreshStarted".to_string(),
};
write!(f, "{}", val)
}
}
impl EventValue for ConnEvent {
fn id() -> &'static str {
"ConnEvent"
}
}
impl EventValue for PeerPoolEvent {
fn id() -> &'static str {
"PeerPoolEvent"
}
}
impl EventValue for DiscoveryEvent {
fn id() -> &'static str {
"DiscoveryEvent"
}
}
impl EventValueTopic for ConnEvent {
type Topic = MonitorTopic;
fn topic() -> Self::Topic {
MonitorTopic::Conn
}
}
impl EventValueTopic for PeerPoolEvent {
type Topic = MonitorTopic;
fn topic() -> Self::Topic {
MonitorTopic::PeerPool
}
}
impl EventValueTopic for DiscoveryEvent {
type Topic = MonitorTopic;
fn topic() -> Self::Topic {
MonitorTopic::Discovery
}
}
|
