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|
mod event;
use std::sync::Arc;
use log::error;
use karyon_core::event::{EventEmitter, EventListener, EventValue, EventValueTopic};
use karyon_net::Endpoint;
pub(crate) use event::{ConnEvent, DiscvEvent, PPEvent};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use crate::{Config, PeerID};
/// Responsible for network and system monitoring.
///
/// It use event emitter to notify the registerd listeners about new events.
///
/// # Example
///
/// ```
/// use std::sync::Arc;
///
/// use smol::Executor;
///
/// use karyon_p2p::{
/// Config, Backend, PeerID, keypair::{KeyPair, KeyPairType}, monitor::ConnectionEvent,
/// };
///
/// 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.register::<ConnectionEvent>().await;
///
/// let new_event = listener.recv().await;
/// };
/// ```
pub struct Monitor {
event_emitter: Arc<EventEmitter<MonitorTopic>>,
config: Arc<Config>,
}
impl Monitor {
/// Creates a new Monitor
pub(crate) fn new(config: Arc<Config>) -> Self {
Self {
event_emitter: EventEmitter::new(),
config,
}
}
/// Sends a new monitor event to subscribers.
pub(crate) async fn notify<E: ToEventStruct>(&self, event: E) {
if self.config.enable_monitor {
let event = event.to_struct();
if let Err(err) = self.event_emitter.emit(&event).await {
error!("Failed to notify monitor event {:?}: {err}", event);
}
}
}
/// Registers a new event listener for the provided topic.
pub async fn register<E>(&self) -> EventListener<MonitorTopic, E>
where
E: Clone + EventValue + EventValueTopic<Topic = MonitorTopic>,
{
self.event_emitter.register(&E::topic()).await
}
}
#[derive(Clone, Debug, Eq, PartialEq, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub enum MonitorTopic {
Connection,
PeerPool,
Discovery,
}
pub(super) trait ToEventStruct: Sized {
type EventStruct: From<Self> + Clone + EventValueTopic<Topic = MonitorTopic> + EventValue;
fn to_struct(self) -> Self::EventStruct {
self.into()
}
}
impl ToEventStruct for ConnEvent {
type EventStruct = ConnectionEvent;
}
impl ToEventStruct for PPEvent {
type EventStruct = PeerPoolEvent;
}
impl ToEventStruct for DiscvEvent {
type EventStruct = DiscoveryEvent;
}
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct ConnectionEvent {
pub event: String,
pub date: i64,
#[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
pub endpoint: Option<Endpoint>,
}
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct PeerPoolEvent {
pub event: String,
pub date: i64,
#[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
pub peer_id: Option<PeerID>,
}
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct DiscoveryEvent {
pub event: String,
pub date: i64,
#[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
pub endpoint: Option<Endpoint>,
#[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
pub size: Option<usize>,
}
impl From<ConnEvent> for ConnectionEvent {
fn from(event: ConnEvent) -> Self {
let endpoint = event.get_endpoint().cloned();
Self {
endpoint,
event: event.variant_name().to_string(),
date: get_current_timestamp(),
}
}
}
impl From<PPEvent> for PeerPoolEvent {
fn from(event: PPEvent) -> Self {
let peer_id = event.get_peer_id().cloned();
Self {
peer_id,
event: event.variant_name().to_string(),
date: get_current_timestamp(),
}
}
}
impl From<DiscvEvent> for DiscoveryEvent {
fn from(event: DiscvEvent) -> Self {
let (endpoint, size) = event.get_endpoint_and_size();
Self {
endpoint: endpoint.cloned(),
size,
event: event.variant_name().to_string(),
date: get_current_timestamp(),
}
}
}
impl EventValue for ConnectionEvent {
fn id() -> &'static str {
"ConnectionEvent"
}
}
impl EventValue for PeerPoolEvent {
fn id() -> &'static str {
"PeerPoolEvent"
}
}
impl EventValue for DiscoveryEvent {
fn id() -> &'static str {
"DiscoveryEvent"
}
}
impl EventValueTopic for ConnectionEvent {
type Topic = MonitorTopic;
fn topic() -> Self::Topic {
MonitorTopic::Connection
}
}
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
}
}
fn get_current_timestamp() -> i64 {
chrono::Utc::now().timestamp()
}
|
