refactor: parts of hottier (#1022)

---------

Co-authored-by: Nikhil Sinha <[email protected]>

Author: Devdutt Shenoi

src/handlers/http/logstream.rs

@@ -586,7 +586,7 @@ pub async fn get_stream_info(stream_name: Path<String>) -> Result<impl Responder
 
 pub async fn put_stream_hot_tier(
     stream_name: Path<String>,
-    Json(json): Json<Value>,
+    Json(mut hottier): Json<StreamHotTier>,
 ) -> Result<impl Responder, StreamError> {
     let stream_name = stream_name.into_inner();
     if !STREAM_INFO.stream_exists(&stream_name) {
@@ -609,35 +609,28 @@ pub async fn put_stream_hot_tier(
             status: StatusCode::BAD_REQUEST,
         });
     }
-    if CONFIG.options.hot_tier_storage_path.is_none() {
-        return Err(StreamError::HotTierNotEnabled(stream_name));
-    }
-
-    let mut hottier: StreamHotTier = match serde_json::from_value(json) {
-        Ok(hottier) => hottier,
-        Err(err) => return Err(StreamError::InvalidHotTierConfig(err)),
-    };
 
     validator::hot_tier(&hottier.size.to_string())?;
 
     STREAM_INFO.set_hot_tier(&stream_name, true)?;
-    if let Some(hot_tier_manager) = HotTierManager::global() {
-        let existing_hot_tier_used_size = hot_tier_manager
-            .validate_hot_tier_size(&stream_name, &hottier.size)
-            .await?;
-        hottier.used_size = existing_hot_tier_used_size.to_string();
-        hottier.available_size = hottier.size.to_string();
-        hottier.version = Some(CURRENT_HOT_TIER_VERSION.to_string());
-        hot_tier_manager
-            .put_hot_tier(&stream_name, &mut hottier)
-            .await?;
-        let storage = CONFIG.storage().get_object_store();
-        let mut stream_metadata = storage.get_object_store_format(&stream_name).await?;
-        stream_metadata.hot_tier_enabled = Some(true);
-        storage
-            .put_stream_manifest(&stream_name, &stream_metadata)
-            .await?;
-    }
+    let Some(hot_tier_manager) = HotTierManager::global() else {
+        return Err(StreamError::HotTierNotEnabled(stream_name));
+    };
+    let existing_hot_tier_used_size = hot_tier_manager
+        .validate_hot_tier_size(&stream_name, hottier.size)
+        .await?;
+    hottier.used_size = existing_hot_tier_used_size;
+    hottier.available_size = hottier.size;
+    hottier.version = Some(CURRENT_HOT_TIER_VERSION.to_string());
+    hot_tier_manager
+        .put_hot_tier(&stream_name, &mut hottier)
+        .await?;
+    let storage = CONFIG.storage().get_object_store();
+    let mut stream_metadata = storage.get_object_store_format(&stream_name).await?;
+    stream_metadata.hot_tier_enabled = true;
+    storage
+        .put_stream_manifest(&stream_name, &stream_metadata)
+        .await?;
 
     Ok((
         format!("hot tier set for stream {stream_name}"),
@@ -662,22 +655,12 @@ pub async fn get_stream_hot_tier(stream_name: Path<String>) -> Result<impl Respo
         }
     }
 
-    if CONFIG.options.hot_tier_storage_path.is_none() {
+    let Some(hot_tier_manager) = HotTierManager::global() else {
         return Err(StreamError::HotTierNotEnabled(stream_name));
-    }
+    };
+    let meta = hot_tier_manager.get_hot_tier(&stream_name).await?;
 
-    if let Some(hot_tier_manager) = HotTierManager::global() {
-        let mut hot_tier = hot_tier_manager.get_hot_tier(&stream_name).await?;
-        hot_tier.size = format!("{} {}", hot_tier.size, "Bytes");
-        hot_tier.used_size = format!("{} Bytes", hot_tier.used_size);
-        hot_tier.available_size = format!("{} Bytes", hot_tier.available_size);
-        Ok((web::Json(hot_tier), StatusCode::OK))
-    } else {
-        Err(StreamError::Custom {
-            msg: format!("hot tier not initialised for stream {}", stream_name),
-            status: (StatusCode::BAD_REQUEST),
-        })
-    }
+    Ok((web::Json(meta), StatusCode::OK))
 }
 
 pub async fn delete_stream_hot_tier(
@@ -699,9 +682,9 @@ pub async fn delete_stream_hot_tier(
         }
     }
 
-    if CONFIG.options.hot_tier_storage_path.is_none() {
+    let Some(hot_tier_manager) = HotTierManager::global() else {
         return Err(StreamError::HotTierNotEnabled(stream_name));
-    }
+    };
 
     if STREAM_INFO.stream_type(&stream_name).unwrap() == Some(StreamType::Internal.to_string()) {
         return Err(StreamError::Custom {
@@ -710,9 +693,8 @@ pub async fn delete_stream_hot_tier(
         });
     }
 
-    if let Some(hot_tier_manager) = HotTierManager::global() {
-        hot_tier_manager.delete_hot_tier(&stream_name).await?;
-    }
+    hot_tier_manager.delete_hot_tier(&stream_name).await?;
+
     Ok((
         format!("hot tier deleted for stream {stream_name}"),
         StatusCode::OK,
@@ -821,8 +803,6 @@ pub mod error {
             "Hot tier is not enabled at the server config, cannot enable hot tier for stream {0}"
         )]
         HotTierNotEnabled(String),
-        #[error("failed to enable hottier due to err: {0}")]
-        InvalidHotTierConfig(serde_json::Error),
         #[error("Hot tier validation failed: {0}")]
         HotTierValidation(#[from] HotTierValidationError),
         #[error("{0}")]
@@ -859,8 +839,7 @@ pub mod error {
                 StreamError::Network(err) => {
                     err.status().unwrap_or(StatusCode::INTERNAL_SERVER_ERROR)
                 }
-                StreamError::HotTierNotEnabled(_) => StatusCode::BAD_REQUEST,
-                StreamError::InvalidHotTierConfig(_) => StatusCode::BAD_REQUEST,
+                StreamError::HotTierNotEnabled(_) => StatusCode::FORBIDDEN,
                 StreamError::HotTierValidation(_) => StatusCode::BAD_REQUEST,
                 StreamError::HotTierError(_) => StatusCode::INTERNAL_SERVER_ERROR,
             }