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use async_trait::async_trait;
use tedge_api::{
address::EndpointKind,
messages::{CoreMessageKind, PluginMessageKind},
plugins::Comms,
Address, CoreMessage, Plugin, PluginBuilder, PluginConfiguration, PluginError, PluginMessage,
};
struct HeartbeatServiceBuilder;
#[async_trait]
impl PluginBuilder for HeartbeatServiceBuilder {
fn name(&self) -> &'static str {
todo!()
}
async fn verify_configuration(
&self,
_config: &PluginConfiguration,
) -> Result<(), tedge_api::errors::PluginError> {
Ok(())
}
async fn instantiate(
&self,
config: PluginConfiguration,
tedge_comms: tedge_api::plugins::Comms,
) -> Result<Box<dyn Plugin>, PluginError> {
let hb_config: HeartbeatConfig = toml::Value::try_into(config.into_inner())?;
Ok(Box::new(HeartbeatService::new(tedge_comms, hb_config)))
}
}
#[derive(serde::Deserialize, Debug)]
struct HeartbeatConfig {
interval: u64,
}
struct HeartbeatService {
comms: tedge_api::plugins::Comms,
config: HeartbeatConfig,
}
impl HeartbeatService {
fn new(comms: tedge_api::plugins::Comms, config: HeartbeatConfig) -> Self {
Self { comms, config }
}
}
#[async_trait]
impl Plugin for HeartbeatService {
async fn setup(&mut self) -> Result<(), PluginError> {
println!("Setting up heartbeat service with interval: {}!", self.config.interval);
Ok(())
}
async fn handle_message(&self, message: PluginMessage) -> Result<(), PluginError> {
match message.kind() {
tedge_api::messages::PluginMessageKind::CheckReadyness => {
let msg = CoreMessage::new(
message.origin().clone(),
CoreMessageKind::SignalPluginState {
state: String::from("Ok"),
},
);
self.comms.send(msg).await?;
}
}
Ok(())
}
async fn shutdown(&mut self) -> Result<(), PluginError> {
println!("Shutting down heartbeat service!");
Ok(())
}
}
#[tokio::main]
async fn main() {
let hsb = HeartbeatServiceBuilder;
let (sender, mut receiver) = tokio::sync::mpsc::channel(10);
let comms = Comms::new(sender);
let config = toml::from_str(
r#"
interval = 200
"#,
)
.unwrap();
let mut heartbeat = hsb.instantiate(config, comms).await.unwrap();
heartbeat.setup().await.unwrap();
let handle = tokio::task::spawn(async move {
let hb = heartbeat;
hb.handle_message(PluginMessage::new(
Address::new(EndpointKind::Core),
PluginMessageKind::CheckReadyness,
))
.await
.unwrap();
hb
});
println!(
"Receiving message from service: {:#?}",
receiver.recv().await
);
let mut heartbeat = handle.await.unwrap();
heartbeat.shutdown().await.unwrap();
}
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