chore: add ai metrics (#1169)

libs/appflowy-ai-client/src/dto.rs

@@ -53,7 +53,7 @@ pub enum OutputLayout {
   SimpleTable = 3,
 }
 
-#[derive(Clone, Debug, Default, Serialize_repr, Deserialize_repr)]
+#[derive(Clone, Debug, Default, Serialize_repr, Deserialize_repr, Eq, PartialEq)]
 #[repr(u8)]
 pub enum OutputContent {
   #[default]
@@ -62,6 +62,12 @@ pub enum OutputContent {
   RichTextImage = 2,
 }
 
+impl OutputContent {
+  pub fn is_image(&self) -> bool {
+    *self == OutputContent::IMAGE || *self == OutputContent::RichTextImage
+  }
+}
+
 #[derive(Clone, Default, Debug, Serialize, Deserialize)]
 pub struct OutputContentMetadata {
   /// Custom prompt for image generation.

src/api/chat.rs

@@ -271,6 +271,7 @@ async fn answer_stream_handler(
     chat::chat_ops::select_chat_message_content(&state.pg_pool, question_id).await?;
   let rag_ids = chat::chat_ops::select_chat_rag_ids(&state.pg_pool, &chat_id).await?;
   let ai_model = ai_model_from_header(&req);
+  state.metrics.ai_metrics.record_total_stream_count(1);
   match state
     .ai_client
     .stream_question(
@@ -291,13 +292,16 @@ async fn answer_stream_handler(
           .streaming(new_answer_stream),
       )
     },
-    Err(err) => Ok(
-      HttpResponse::Ok()
-        .content_type("text/event-stream")
-        .streaming(stream::once(async move {
-          Err(AppError::AIServiceUnavailable(err.to_string()))
-        })),
-    ),
+    Err(err) => {
+      state.metrics.ai_metrics.record_failed_stream_count(1);
+      Ok(
+        HttpResponse::Ok()
+          .content_type("text/event-stream")
+          .streaming(stream::once(async move {
+            Err(AppError::AIServiceUnavailable(err.to_string()))
+          })),
+      )
+    },
   }
 }
 
@@ -313,6 +317,7 @@ async fn answer_stream_v2_handler(
   let rag_ids = chat::chat_ops::select_chat_rag_ids(&state.pg_pool, &chat_id).await?;
   let ai_model = ai_model_from_header(&req);
 
+  state.metrics.ai_metrics.record_total_stream_count(1);
   trace!(
     "[Chat] stream answer for chat: {}, question: {}, rag_ids: {:?}",
     chat_id,
@@ -340,13 +345,16 @@ async fn answer_stream_v2_handler(
           .streaming(new_answer_stream),
       )
     },
-    Err(err) => Ok(
-      HttpResponse::ServiceUnavailable()
-        .content_type("text/event-stream")
-        .streaming(stream::once(async move {
-          Err(AppError::AIServiceUnavailable(err.to_string()))
-        })),
-    ),
+    Err(err) => {
+      state.metrics.ai_metrics.record_failed_stream_count(1);
+      Ok(
+        HttpResponse::ServiceUnavailable()
+          .content_type("text/event-stream")
+          .streaming(stream::once(async move {
+            Err(AppError::AIServiceUnavailable(err.to_string()))
+          })),
+      )
+    },
   }
 }
 
@@ -363,6 +371,10 @@ async fn answer_stream_v3_handler(
     chat::chat_ops::select_chat_message_content(&state.pg_pool, payload.question_id).await?;
   let rag_ids = chat::chat_ops::select_chat_rag_ids(&state.pg_pool, &payload.chat_id).await?;
   let ai_model = ai_model_from_header(&req);
+  state.metrics.ai_metrics.record_total_stream_count(1);
+  if payload.format.output_content.is_image() {
+    state.metrics.ai_metrics.record_stream_image_count(1);
+  }
 
   let question = ChatQuestion {
     chat_id: payload.chat_id,
@@ -377,6 +389,7 @@ async fn answer_stream_v3_handler(
       rag_ids,
     },
   };
+
   trace!("[Chat] stream v3 {:?}", question);
   match state
     .ai_client
@@ -391,13 +404,16 @@ async fn answer_stream_v3_handler(
           .streaming(new_answer_stream),
       )
     },
-    Err(err) => Ok(
-      HttpResponse::ServiceUnavailable()
-        .content_type("text/event-stream")
-        .streaming(stream::once(async move {
-          Err(AppError::AIServiceUnavailable(err.to_string()))
-        })),
-    ),
+    Err(err) => {
+      state.metrics.ai_metrics.record_failed_stream_count(1);
+      Ok(
+        HttpResponse::ServiceUnavailable()
+          .content_type("text/event-stream")
+          .streaming(stream::once(async move {
+            Err(AppError::AIServiceUnavailable(err.to_string()))
+          })),
+      )
+    },
   }
 }
 

src/biz/chat/metrics.rs

@@ -0,0 +1,46 @@
+use prometheus_client::metrics::counter::Counter;
+
+#[derive(Default, Clone)]
+pub struct AIMetrics {
+  total_stream_count: Counter,
+  failed_stream_count: Counter,
+  stream_image_count: Counter,
+}
+
+impl AIMetrics {
+  pub fn register(registry: &mut prometheus_client::registry::Registry) -> Self {
+    let metrics = Self::default();
+    let realtime_registry = registry.sub_registry_with_prefix("ai");
+
+    // Register each metric with the Prometheus registry
+    realtime_registry.register(
+      "total_stream_count",
+      "Total count of streams processed",
+      metrics.total_stream_count.clone(),
+    );
+    realtime_registry.register(
+      "failed_stream_count",
+      "Total count of failed streams",
+      metrics.failed_stream_count.clone(),
+    );
+    realtime_registry.register(
+      "image_stream_count",
+      "Total count of image streams processed",
+      metrics.stream_image_count.clone(),
+    );
+
+    metrics
+  }
+
+  pub fn record_total_stream_count(&self, count: u64) {
+    self.total_stream_count.inc_by(count);
+  }
+
+  pub fn record_failed_stream_count(&self, count: u64) {
+    self.failed_stream_count.inc_by(count);
+  }
+
+  pub fn record_stream_image_count(&self, count: u64) {
+    self.stream_image_count.inc_by(count);
+  }
+}

src/biz/chat/mod.rs

@@ -1 +1,2 @@
+pub mod metrics;
 pub mod ops;

src/state.rs

@@ -28,6 +28,7 @@ use snowflake::Snowflake;
 use tonic_proto::history::history_client::HistoryClient;
 
 use crate::api::metrics::{AppFlowyWebMetrics, PublishedCollabMetrics, RequestMetrics};
+use crate::biz::chat::metrics::AIMetrics;
 use crate::biz::pg_listener::PgListeners;
 use crate::biz::workspace::publish::PublishedCollabStore;
 use crate::config::config::Config;
@@ -130,6 +131,7 @@ pub struct AppMetrics {
   pub appflowy_web_metrics: Arc<AppFlowyWebMetrics>,
   pub embedding_metrics: Arc<EmbeddingMetrics>,
   pub collab_stream_metrics: Arc<CollabStreamMetrics>,
+  pub ai_metrics: Arc<AIMetrics>,
 }
 
 impl Default for AppMetrics {
@@ -149,6 +151,7 @@ impl AppMetrics {
     let appflowy_web_metrics = Arc::new(AppFlowyWebMetrics::register(&mut registry));
     let embedding_metrics = Arc::new(EmbeddingMetrics::register(&mut registry));
     let collab_stream_metrics = Arc::new(CollabStreamMetrics::register(&mut registry));
+    let ai_metrics = Arc::new(AIMetrics::register(&mut registry));
     Self {
       registry: Arc::new(registry),
       request_metrics,
@@ -159,6 +162,7 @@ impl AppMetrics {
       appflowy_web_metrics,
       embedding_metrics,
       collab_stream_metrics,
+      ai_metrics,
     }
   }
 }