Log debug tile specs and cache hits

Related to #44.

Cargo.toml

@@ -20,6 +20,7 @@ actix-cors = "0.6"
 anymap = "0.12"
 env_logger = "0.9"
 lazy_static = "1"
+log = "0"
 lru-cache = "0.1.2"
 n5 = "0.7"
 ndarray = "0.13"

src/cache.rs

@@ -6,6 +6,7 @@ use anymap::{
     any::Any,
     Map,
 };
+use log::debug;
 use lru_cache::LruCache;
 use n5::prelude::*;
 use n5::{
@@ -134,6 +135,7 @@ impl<N: N5Reader> N5Reader for N5CacheReader<N> {
             let mut ds_block_cache = ds_cache.write().unwrap();
 
             if let Some(block) = ds_block_cache.get_mut(&grid_position[..]) {
+                debug!("Block cache hit: {path_name} {grid_position:?}");
                 return Ok(block.clone());
             }
         }

src/main.rs

@@ -13,6 +13,7 @@ use actix_web::web::Bytes;
 use actix_web::web::Data;
 use actix_web::web::Query;
 use actix_web::*;
+use log::debug;
 use lru_cache::LruCache;
 use n5::filesystem::N5Filesystem;
 use n5::smallvec::SmallVec;
@@ -81,7 +82,7 @@ impl ResponseError for TileImageSpecError {
 }
 
 /// Specifies a tile to slice from a dataset and an image format to encode it.
-#[derive(PartialEq, Eq, Hash)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct TileImageSpec {
     tile: TileSpec,
     format: EncodingFormat,
@@ -155,6 +156,8 @@ async fn tile<N: N5Reader>(
         spec
     };
 
+    debug!("{spec:?}");
+
     if spec.tile.tile_size.w > state.max_tile_size.w
         || spec.tile.tile_size.h > state.max_tile_size.h
     {
@@ -166,6 +169,7 @@ async fn tile<N: N5Reader>(
     if let Some(cache) = &state.tile_cache {
         let mut cache_lock = cache.write().unwrap();
         if let Some(tile) = cache_lock.get_mut(&spec) {
+            debug!("Tile cache hit");
             return Ok(HttpResponse::Ok()
                 .content_type(spec.format.content_type())
                 .body(tile.clone()));