feat(router): get config

1 files changed, 108 insertions, 0 deletions

diff --git a/crates/router/src/processor.rs b/crates/router/src/processor.rs
new file mode 100644
index 0000000..b8c69f3
--- /dev/null
+++ b/crates/router/src/processor.rs
@@ -0,0 +1,108 @@
+pub mod grpc;
+mod reload;
+mod route;
+mod publish;
+mod load;
+
+use std::sync::Arc;
+
+use anyhow::Result;
+use async_nats::jetstream::{consumer::{pull, Consumer}, Context};
+use tokio::signal;
+use tracing::{error, trace};
+use warden_stack::{Configuration, tracing::SdkTracerProvider};
+use futures_util::StreamExt;
+
+use crate::{cnfg::Nats, state::{AppHandle, AppState, Services}};
+
+
+pub async fn serve(
+    services: Services,
+    config: Configuration,
+    provider: SdkTracerProvider,
+) -> anyhow::Result<()> {
+    let state = Arc::new(AppState::new(services, config).await?);
+
+    tokio::select! {
+        _ = futures_util::future::try_join(reload::reload(Arc::clone(&state)), run(state)) => {}
+        _ = shutdown_signal(provider) => {}
+    };
+
+    Ok(())
+}
+
+
+async fn run(state: AppHandle) -> anyhow::Result<()> {
+    let config = Arc::clone(&state);
+    let (consumer, _) = tokio::join!(
+        get_or_create_stream(&state.services.jetstream, &state.config.nats),
+        load::get_routing_config(Arc::clone(&config))
+    );
+
+    let consumer = consumer?;
+
+    // Consume messages from the consumer
+    while let Some(Ok(message)) = consumer.messages().await?.next().await {
+        if let Err(e) = route::route(message, Arc::clone(&state)).await {
+            error!("{}", e.to_string());
+        }
+    }
+
+    Ok(())
+}
+
+async fn get_or_create_stream(
+    jetstream: &Context,
+    nats: &Nats,
+) -> anyhow::Result<Consumer<pull::Config>> {
+    trace!(name = ?nats.name, "getting or creating stream");
+    let stream = jetstream
+        .get_or_create_stream(async_nats::jetstream::stream::Config {
+            name: nats.name.to_string(),
+            subjects: nats.subjects.iter().map(Into::into).collect(),
+            max_messages: nats.max_messages,
+            ..Default::default()
+        })
+        .await?;
+    let durable = nats.durable_name.to_string();
+    // Get or create a pull-based consumer
+    Ok(stream
+        .get_or_create_consumer(
+            durable.as_ref(),
+            async_nats::jetstream::consumer::pull::Config {
+                durable_name: Some(durable.to_string()),
+                ..Default::default()
+            },
+        )
+        .await?)
+}
+
+
+async fn shutdown_signal(provider: SdkTracerProvider) -> Result<()> {
+    let ctrl_c = async {
+        signal::ctrl_c()
+            .await
+            .expect("failed to install Ctrl+C handler");
+    };
+
+    #[cfg(unix)]
+    let terminate = async {
+        signal::unix::signal(signal::unix::SignalKind::terminate())
+            .expect("failed to install signal handler")
+            .recv()
+            .await;
+    };
+
+    #[cfg(not(unix))]
+    let terminate = std::future::pending::<()>();
+
+    tokio::select! {
+        _ = ctrl_c => {
+        },
+        _ = terminate => {
+        },
+    }
+    let _ = provider.shutdown();
+
+    Ok(())
+}