clippy, refactor

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
-target
+target
+/testdb

src/load_test.rs

@@ -1,5 +1,5 @@
-use std::borrow::Borrow;
-use std::borrow::BorrowMut;
+
+
 use std::sync::Arc;
 use std::sync::Mutex;
 
@@ -13,7 +13,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let mut handles = vec![];
     let num_shards = 8;
-    for _ in (0..num_shards).into_iter() {
+    for _ in 0..num_shards {
         let pb = pb.clone();
         handles.push(std::thread::spawn(move || {
             run_loop(pb).unwrap();
@@ -27,7 +27,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     Ok(())
 }
 
-fn run_loop(mut pb: Arc<Mutex<Bar>>) -> Result<(), Box<dyn std::error::Error>> {
+fn run_loop(pb: Arc<Mutex<Bar>>) -> Result<(), Box<dyn std::error::Error>> {
     let client = reqwest::blocking::Client::new();
     let mut rng = rand::thread_rng();
     let mut rand_data = vec![0u8; 1024 * 1024];
@@ -55,5 +55,4 @@ fn run_loop(mut pb: Arc<Mutex<Bar>>) -> Result<(), Box<dyn std::error::Error>> {
         pb.update(1)?;
         if resp.status() != 200 && resp.status() != 201 {}
     }
-    Ok(())
 }

src/main.rs

@@ -1,3 +1,5 @@
+mod shutdown_signal;
+
 use axum::Json;
 use axum::{body::Bytes, http::StatusCode, routing::post, Extension, Router};
 use axum_typed_multipart::{FieldData, TryFromMultipart, TypedMultipart};
@@ -6,10 +8,10 @@ use rusqlite::ffi;
 use rusqlite::params;
 use rusqlite::Error::SqliteFailure;
 use sha2::Digest;
-use tokio::signal;
 use std::collections::HashMap;
 use std::{borrow::Borrow, error::Error, path::PathBuf, sync::Arc};
 use tokio::net::TcpListener;
+
 use tokio_rusqlite::Connection;
 use tracing::{error, info};
 
@@ -77,7 +79,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         }
 
         for (shard, conn) in shards.iter().enumerate() {
-            let count = num_entries_in(&conn).await?;
+            let count = num_entries_in(conn).await?;
             info!("shard {} has {} entries", shard, count);
         }
 
@@ -97,37 +99,15 @@ async fn server_loop(server: TcpListener, shards: Shards) -> Result<(), Box<dyn
     let app = Router::new()
         .route("/store", post(store_request_handler))
         .layer(Extension(shards));
-    axum::serve(server, app.into_make_service()).with_graceful_shutdown(shutdown_signal()).await?;
+    axum::serve(server, app.into_make_service())
+        .with_graceful_shutdown(crate::shutdown_signal::shutdown_signal())
+        .await?;
     Ok(())
 }
 
-async fn shutdown_signal() {
-    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 => {},
-    }
-}
-
 type ResultType = Result<
-    (StatusCode, Json<HashMap<&'static str, String>>), 
-    (StatusCode, Json<HashMap<&'static str, String>>)
+    (StatusCode, Json<HashMap<&'static str, String>>),
+    (StatusCode, Json<HashMap<&'static str, String>>),
 >;
 
 #[axum::debug_handler]
@@ -137,7 +117,7 @@ async fn store_request_handler(
 ) -> ResultType {
     // compute sha256 of data
     let data_bytes = &request.data.contents;
-    let sha256 = sha2::Sha256::digest(&data_bytes);
+    let sha256 = sha2::Sha256::digest(data_bytes);
     let sha256_str = format!("{:x}", sha256);
     let num_shards = shards.0.len();
     // select shard
@@ -163,13 +143,10 @@ async fn store_request_handler(
     };
 
     let conn = conn.borrow();
-    perform_store(&conn, request_parsed).await
+    perform_store(conn, request_parsed).await
 }
 
-async fn perform_store(
-    conn: &Connection,
-    store_request: StoreRequestParsed,
-) -> ResultType {
+async fn perform_store(conn: &Connection, store_request: StoreRequestParsed) -> ResultType {
     conn.call(move |conn| {
             let created_at = chrono::Utc::now().to_rfc3339();
             let maybe_error = conn.execute(
@@ -198,7 +175,7 @@ async fn perform_store(
             let mut response = HashMap::new();
             response.insert("status", "ok".to_owned());
             response.insert("message", "created".to_owned());
-            return Ok((StatusCode::CREATED, Json(response)));    
+            Ok((StatusCode::CREATED, Json(response)))
         })
         .await.map_err(|e| {
             error!("store failed: {}", e);
@@ -248,7 +225,9 @@ async fn num_entries_in(conn: &Connection) -> Result<i64, Box<dyn Error>> {
     conn.call(|conn| {
         let count: i64 = conn.query_row("SELECT COUNT(*) FROM entries", [], |row| row.get(0))?;
         Ok(count)
-    }).await.map_err(|e| e.into())
+    })
+    .await
+    .map_err(|e| e.into())
 }
 
 fn validate_manifest(args: Args) -> Result<usize, Box<dyn Error>> {
@@ -266,15 +245,13 @@ fn validate_manifest(args: Args) -> Result<usize, Box<dyn Error>> {
             }
         }
         Ok(manifest.shards)
+    } else if let Some(shards) = args.shards {
+        std::fs::create_dir_all(&args.db_path)?;
+        let manifest = ManifestData { shards };
+        let manifest_json = serde_json::to_string(&manifest)?;
+        std::fs::write(manifest_path, manifest_json)?;
+        Ok(shards)
     } else {
-        if let Some(shards) = args.shards {
-            std::fs::create_dir_all(&args.db_path)?;
-            let manifest = ManifestData { shards };
-            let manifest_json = serde_json::to_string(&manifest)?;
-            std::fs::write(manifest_path, manifest_json)?;
-            return Ok(shards);
-        } else {
-            return Err("new database needs --shards argument".into());
-        }
+        Err("new database needs --shards argument".into())
     }
 }

src/shutdown_signal.rs

@@ -0,0 +1,25 @@
+use tokio::signal;
+
+pub async fn shutdown_signal() {
+    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 => {},
+    }
+}