split the run function in two

index-scheduler/src/index_scheduler.rs

@@ -201,23 +201,29 @@ impl IndexScheduler {
     }
 
     /// This worker function must be run in a different thread and must be run only once.
-    fn run(&self) {
+    fn run(&self) -> ! {
         loop {
             self.wake_up.wait();
 
+            self.tick()
+        }
+    }
+
+    /// Create and execute and store the result of one batch of registered tasks.
+    fn tick(&self) {
         let mut wtxn = match self.env.write_txn() {
             Ok(wtxn) => wtxn,
             Err(e) => {
                 log::error!("{}", e);
-                    continue;
+                return;
             }
         };
         let batch = match self.create_next_batch(&wtxn) {
             Ok(Some(batch)) => batch,
-                Ok(None) => continue,
+            Ok(None) => return,
             Err(e) => {
                 log::error!("{}", e);
-                    continue;
+                return;
             }
         };
         // 1. store the starting date with the bitmap of processing tasks
@@ -238,8 +244,7 @@ impl IndexScheduler {
             Ok(()) => log::info!("A batch of tasks was successfully completed."),
             Err(e) => {
                 log::error!("{}", e);
-                    continue;
+                return;
-                }
             }
         }
     }