reorganize snapshot stats, implement detailed summary

src/stats.rs

@@ -1,13 +1,8 @@
-use rocket::serde::Serialize;
+mod snap;
+
 use std::sync::atomic::{AtomicU64, Ordering};
 
-#[derive(Serialize)]
-pub struct Snapshot {
-    pub request: u64,
-    pub blocked: u64,
-    pub entries: u64,
-    pub percent: f32,
-}
+pub use snap::Snap;
 
 #[derive(Default)]
 pub struct Total {
@@ -23,19 +18,12 @@ impl Total {
             ..Self::default()
         }
     }
-    pub fn snapshot(&self) -> Snapshot {
-        let request = self.request.load(Ordering::Relaxed);
-        let blocked = self.blocked.load(Ordering::Relaxed);
-        Snapshot {
-            request,
-            blocked,
-            entries: self.entries.load(Ordering::Relaxed),
-            percent: if request > 0 {
-                blocked as f32 * 100.0 / request as f32
-            } else {
-                0.0
-            },
-        }
+    pub fn snap(&self) -> Snap {
+        Snap::shot(
+            self.entries.load(Ordering::Relaxed),
+            self.request.load(Ordering::Relaxed),
+            self.blocked.load(Ordering::Relaxed),
+        )
     }
     pub fn set_entries(&self, value: u64) {
         self.entries.store(value, Ordering::Relaxed);