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use async_nats::jetstream::consumer;
use futures_util::StreamExt;
use prost::Message as _;
use tracing::{error, info, trace};
use uuid::Uuid;
use warden_core::configuration::{ConfigKind, ReloadEvent};
use crate::state::AppHandle;
pub async fn reload(state: AppHandle) -> anyhow::Result<()> {
let id = Uuid::now_v7().to_string();
info!(durable = id, "listening for configuration changes");
let durable = &id;
let consumer = state
.services
.jetstream
.get_stream(state.config.nats.config.stream.to_string())
.await?
.get_or_create_consumer(
durable,
consumer::pull::Config {
durable_name: Some(durable.to_string()),
filter_subject: state.config.nats.config.reload_subject.to_string(),
deliver_policy: consumer::DeliverPolicy::LastPerSubject,
..Default::default()
},
)
.await?;
let mut messages = consumer.messages().await?;
while let Some(value) = messages.next().await {
match value {
Ok(message) => {
trace!("got reload cache event");
if let Ok(res) = ReloadEvent::decode(message.payload.as_ref())
&& let Ok(kind) = ConfigKind::try_from(res.kind)
{
match kind {
ConfigKind::Routing => {
trace!("update triggered, invalidating active routing config");
let local_cache = state.local_cache.write().await;
local_cache.invalidate_all();
let _ = message.ack().await.inspect_err(|e| error!("{e}"));
}
ConfigKind::Rule => {
trace!(kind = ?kind, "detected reload event, nothing to do here, acknowledging");
let _ = message.ack().await.inspect_err(|e| error!("{e}"));
}
}
}
}
Err(e) => {
error!("{e}")
}
}
}
Ok(())
}
|
