feat(server): add tracing spans and caching to archive and blame services

- Add tracing spans with repo labels for archive and blame operations
- Implement caching for archive list entries when using OID selectors
- Implement caching for blame operations when using OID selectors
- Add detailed

server/tree.rs

@@ -1,6 +1,6 @@
 use crate::pb::*;
 
-use super::{GitksService, into_status, into_stream};
+use super::{GitksService, cache, into_status, into_stream};
 
 #[tonic::async_trait]
 impl tree_service_server::TreeService for GitksService {
@@ -12,8 +12,18 @@ impl tree_service_server::TreeService for GitksService {
         request: tonic::Request<ListTreeRequest>,
     ) -> Result<tonic::Response<ListTreeResponse>, tonic::Status> {
         let inner = request.into_inner();
+        let repo = self.repo_label(inner.repository.as_ref());
+        let span = tracing::info_span!("tree.list_tree", %repo);
+        let _enter = span.enter();
         let gb = self.resolve(inner.repository.as_ref())?;
-        let resp = gb.list_tree(inner).map_err(into_status)?;
+        let resp = if cache::selector_is_oid(&inner.revision) {
+            cache::cached_response("tree.list_tree", &inner, || {
+                gb.list_tree(inner.clone()).map_err(into_status)
+            })?
+        } else {
+            gb.list_tree(inner).map_err(into_status)?
+        };
+        tracing::info!(%repo, count = resp.entries.len(), "list_tree done");
         Ok(tonic::Response::new(resp))
     }
 
@@ -22,8 +32,17 @@ impl tree_service_server::TreeService for GitksService {
         request: tonic::Request<GetTreeRequest>,
     ) -> Result<tonic::Response<Tree>, tonic::Status> {
         let inner = request.into_inner();
+        let repo = self.repo_label(inner.repository.as_ref());
+        let span = tracing::info_span!("tree.get_tree", %repo);
+        let _enter = span.enter();
         let gb = self.resolve(inner.repository.as_ref())?;
-        let resp = gb.get_tree(inner).map_err(into_status)?;
+        let resp = if cache::selector_is_oid(&inner.revision) {
+            cache::cached_response("tree.get_tree", &inner, || {
+                gb.get_tree(inner.clone()).map_err(into_status)
+            })?
+        } else {
+            gb.get_tree(inner).map_err(into_status)?
+        };
         Ok(tonic::Response::new(resp))
     }
 
@@ -32,8 +51,18 @@ impl tree_service_server::TreeService for GitksService {
         request: tonic::Request<GetBlobRequest>,
     ) -> Result<tonic::Response<Blob>, tonic::Status> {
         let inner = request.into_inner();
+        let repo = self.repo_label(inner.repository.as_ref());
+        let path = inner.path.clone();
+        let span = tracing::info_span!("tree.get_blob", %repo, %path);
+        let _enter = span.enter();
         let gb = self.resolve(inner.repository.as_ref())?;
-        let resp = gb.get_blob(inner).map_err(into_status)?;
+        let resp = if cache::selector_is_oid(&inner.revision) {
+            cache::cached_response("tree.get_blob", &inner, || {
+                gb.get_blob(inner.clone()).map_err(into_status)
+            })?
+        } else {
+            gb.get_blob(inner).map_err(into_status)?
+        };
         Ok(tonic::Response::new(resp))
     }
 
@@ -42,8 +71,21 @@ impl tree_service_server::TreeService for GitksService {
         request: tonic::Request<GetRawBlobRequest>,
     ) -> Result<tonic::Response<Self::GetRawBlobStream>, tonic::Status> {
         let inner = request.into_inner();
+        let repo = self.repo_label(inner.repository.as_ref());
+        let span = tracing::info_span!("tree.get_raw_blob", %repo);
+        let _enter = span.enter();
         let gb = self.resolve(inner.repository.as_ref())?;
-        let items = gb.get_raw_blob(inner).map_err(into_status)?;
+        let items = if inner.oid.is_some() {
+            cache::cached_vec_response("tree.get_raw_blob", &inner, || {
+                gb.get_raw_blob(inner.clone()).map_err(into_status)
+            })?
+        } else if cache::selector_is_oid(&inner.revision) {
+            cache::cached_vec_response("tree.get_raw_blob", &inner, || {
+                gb.get_raw_blob(inner.clone()).map_err(into_status)
+            })?
+        } else {
+            gb.get_raw_blob(inner).map_err(into_status)?
+        };
         Ok(tonic::Response::new(into_stream(items)))
     }
 
@@ -52,8 +94,17 @@ impl tree_service_server::TreeService for GitksService {
         request: tonic::Request<GetFileMetadataRequest>,
     ) -> Result<tonic::Response<FileMetadata>, tonic::Status> {
         let inner = request.into_inner();
+        let repo = self.repo_label(inner.repository.as_ref());
+        let span = tracing::info_span!("tree.get_file_metadata", %repo);
+        let _enter = span.enter();
         let gb = self.resolve(inner.repository.as_ref())?;
-        let resp = gb.get_file_metadata(inner).map_err(into_status)?;
+        let resp = if cache::selector_is_oid(&inner.revision) {
+            cache::cached_response("tree.get_file_metadata", &inner, || {
+                gb.get_file_metadata(inner.clone()).map_err(into_status)
+            })?
+        } else {
+            gb.get_file_metadata(inner).map_err(into_status)?
+        };
         Ok(tonic::Response::new(resp))
     }
 
@@ -62,8 +113,18 @@ impl tree_service_server::TreeService for GitksService {
         request: tonic::Request<FindFilesRequest>,
     ) -> Result<tonic::Response<FindFilesResponse>, tonic::Status> {
         let inner = request.into_inner();
+        let repo = self.repo_label(inner.repository.as_ref());
+        let span = tracing::info_span!("tree.find_files", %repo);
+        let _enter = span.enter();
         let gb = self.resolve(inner.repository.as_ref())?;
-        let resp = gb.find_files(inner).map_err(into_status)?;
+        let resp = if cache::selector_is_oid(&inner.revision) {
+            cache::cached_response("tree.find_files", &inner, || {
+                gb.find_files(inner.clone()).map_err(into_status)
+            })?
+        } else {
+            gb.find_files(inner).map_err(into_status)?
+        };
+        tracing::info!(%repo, count = resp.files.len(), "find_files done");
         Ok(tonic::Response::new(resp))
     }
 }