chore: move server startup and traits to async

server/Cargo.toml

@@ -15,11 +15,13 @@ actix-web = { version = "4.3.0", features = ["rustls"] }
 actix-web-opentelemetry = { version = "0.13.0", features = ["metrics", "metrics-prometheus"] }
 
 anyhow = "1.0.68"
+async-trait = "0.1.64"
 awc = { version = "3.1.0", features = ["rustls"] }
 chrono = { version = "0.4.23", features = ["serde"] }
 clap = { version = "4.1.4", features = ["derive", "env"] }
 dashmap = "5.4.0"
 dotenv = { version = "0.15.0", features = ["clap"] }
+futures = "0.3.26"
 opentelemetry = { version = "0.18.0", features = ["trace", "rt-tokio", "metrics"] }
 opentelemetry-prometheus = "0.11.0"
 prometheus = { version = "0.13.3", features = ["process"] }

server/src/data_sources/memory_provider.rs

@@ -1,9 +1,12 @@
+use std::collections::HashMap;
+
+use async_trait::async_trait;
 use dashmap::DashMap;
 use unleash_types::client_features::ClientFeatures;
 
 use crate::{
     error::EdgeError,
-    types::{EdgeProvider, EdgeResult, EdgeToken, FeaturesProvider, TokenProvider},
+    types::{EdgeProvider, EdgeResult, EdgeSink, EdgeToken, FeaturesProvider, TokenProvider},
 };
 
 #[derive(Debug, Clone, Default)]
@@ -12,6 +15,20 @@ pub struct MemoryProvider {
     token_store: Vec<EdgeToken>,
 }
 
+impl MemoryProvider {
+    fn sink_features(&mut self, token: &EdgeToken, features: ClientFeatures) {
+        self.data_store.insert(token.token.clone(), features);
+    }
+
+    fn sink_tokens(&mut self, tokens: Vec<EdgeToken>) {
+        let joined_tokens = tokens.iter().chain(self.token_store.iter());
+        let deduplicated: HashMap<String, EdgeToken> = joined_tokens
+            .map(|x| (x.token.clone(), x.clone()))
+            .collect();
+        self.token_store = deduplicated.into_values().collect();
+    }
+}
+
 impl EdgeProvider for MemoryProvider {}
 
 impl FeaturesProvider for MemoryProvider {
@@ -38,30 +55,29 @@ impl TokenProvider for MemoryProvider {
     }
 }
 
+#[async_trait]
+impl EdgeSink for MemoryProvider {
+    async fn sink_features(
+        &mut self,
+        token: &EdgeToken,
+        features: ClientFeatures,
+    ) -> EdgeResult<()> {
+        self.sink_features(token, features);
+        Ok(())
+    }
+
+    async fn sink_tokens(&mut self, tokens: Vec<EdgeToken>) -> EdgeResult<()> {
+        self.sink_tokens(tokens);
+        Ok(())
+    }
+}
+
 #[cfg(test)]
 mod test {
-    use std::collections::HashMap;
-
     use unleash_types::client_features::ClientFeature;
 
-    use crate::types::EdgeSink;
-
     use super::*;
 
-    impl EdgeSink for MemoryProvider {
-        fn sink_features(&mut self, token: &EdgeToken, features: ClientFeatures) {
-            self.data_store.insert(token.token.clone(), features);
-        }
-
-        fn sink_tokens(&mut self, tokens: Vec<EdgeToken>) {
-            let joined_tokens = tokens.iter().chain(self.token_store.iter());
-            let deduplicated: HashMap<String, EdgeToken> = joined_tokens
-                .map(|x| (x.token.clone(), x.clone()))
-                .collect();
-            self.token_store = deduplicated.into_values().collect();
-        }
-    }
-
     #[test]
     fn memory_provider_correctly_deduplicates_tokens() {
         let mut provider = MemoryProvider::default();

server/src/http/mod.rs

@@ -0,0 +1 @@
+pub mod unleash_client;

server/src/lib.rs

@@ -7,7 +7,6 @@ pub mod error;
 pub mod frontend_api;
 pub mod metrics;
 pub mod types;
-pub mod unleash_client;
 pub mod urls;
 
 pub mod tokens;

server/src/main.rs

@@ -102,9 +102,12 @@ async fn main() -> Result<(), anyhow::Error> {
     } else {
         server.bind(http_args.http_server_tuple())
     };
-    server?
-        .shutdown_timeout(5)
-        .run()
-        .await
-        .map_err(anyhow::Error::new)
+    let server = server?.shutdown_timeout(5);
+
+    tokio::select! {
+        _ = server.run() => {
+        }
+    }
+
+    Ok(())
 }

server/src/types.rs

@@ -10,6 +10,7 @@ use actix_web::{
     web::{Data, Json},
     FromRequest, HttpRequest,
 };
+use async_trait::async_trait;
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
 use shadow_rs::shadow;
@@ -203,9 +204,14 @@ pub trait TokenProvider {
 
 pub trait EdgeProvider: FeaturesProvider + TokenProvider + Send + Sync {}
 
+#[async_trait]
 pub trait EdgeSink {
-    fn sink_features(&mut self, token: &EdgeToken, features: ClientFeatures);
-    fn sink_tokens(&mut self, token: Vec<EdgeToken>);
+    async fn sink_features(
+        &mut self,
+        token: &EdgeToken,
+        features: ClientFeatures,
+    ) -> EdgeResult<()>;
+    async fn sink_tokens(&mut self, token: Vec<EdgeToken>) -> EdgeResult<()>;
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]