functional tracing

src/chromium/rocket.rs

@@ -2,7 +2,7 @@ use std::{sync::Arc, time::Duration};
 use async_trait::async_trait;
 use async_mutex::Mutex;
 use headless_chrome::{Browser, LaunchOptions};
-use log::{error, info};
+use tracing::{error, info, debug, trace, warn};
 use rocket::{fairing::{Fairing, self}, Rocket, Build, Request, request::{FromRequest, Outcome}, futures::pin_mut, http::Status};
 use tokio::time::sleep;
 
@@ -45,9 +45,11 @@ impl ChromiumCoordinator {
    
    pub async fn new() -> Self {
         let instances: Arc<Mutex<Vec<BrowserHolder>>> = Arc::new(Mutex::new(Vec::with_capacity(Self::NUMBER_OF_INSTANCES)));
+        trace!("creating {} Chromium instances", Self::NUMBER_OF_INSTANCES);
         while instances.lock().await.len() < Self::NUMBER_OF_INSTANCES {
             instances.lock().await.push(Self::create_browser_instance());
         }
+        trace!("done creating {} Chromium instances", Self::NUMBER_OF_INSTANCES);
 
         Self { instances }
    }
@@ -62,9 +64,10 @@ impl ChromiumCoordinator {
    fn spawn_browser(&self) {
     let instances = self.instances.clone(); 
     tokio::spawn(async move {
-        info!("Spawn new instance of browser");
+        debug!("spawn new instance of browser");
         // Create new instance
         instances.lock().await.push(Self::create_browser_instance());
+        debug!("spawned new instance of browser");
     });
    }
 
@@ -94,7 +97,10 @@ impl ChromiumCoordinator {
         let browser = self.loop_get_instance().await;
         match browser.browser.get_version() {
             Ok(_) => Ok(browser),
-            Err(_) => Err(()),
+            Err(_) => {
+                warn!("found dead browser instance");
+                Err(())
+            },
         }
     }
 
@@ -103,6 +109,7 @@ impl ChromiumCoordinator {
             match self.try_get_browser().await {
                 Ok(browser) => return Ok(browser),
                 Err(_) => {
+                    trace!("all instances of browser are dead... waiting for    ");
                     // all instances may be dead ... we must wait for new instance
                 }
             }