Fix stats dymanic reload (#87)

src/main.rs

@@ -60,7 +60,7 @@ mod sharding;
 mod stats;
 
 use config::{get_config, reload_config};
-use pool::{get_pool, ClientServerMap, ConnectionPool};
+use pool::{ClientServerMap, ConnectionPool};
 use stats::{Collector, Reporter, REPORTER};
 
 #[tokio::main(worker_threads = 4)]
@@ -120,8 +120,6 @@ async fn main() {
         }
     };
 
-    let pool = get_pool();
-
     // Statistics collector task.
     let collector_tx = tx.clone();
 
@@ -129,16 +127,13 @@ async fn main() {
     let reload_client_server_map = client_server_map.clone();
     let autoreload_client_server_map = client_server_map.clone();
 
-    let addresses = pool.databases();
     tokio::task::spawn(async move {
         let mut stats_collector = Collector::new(rx, collector_tx);
-        stats_collector.collect(addresses).await;
+        stats_collector.collect().await;
     });
 
     info!("Waiting for clients");
 
-    drop(pool);
-
     // Client connection loop.
     tokio::task::spawn(async move {
         loop {

src/stats.rs

@@ -6,6 +6,8 @@ use parking_lot::Mutex;
 use std::collections::HashMap;
 use tokio::sync::mpsc::{channel, Receiver, Sender};
 
+use crate::pool::get_pool;
+
 pub static REPORTER: Lazy<ArcSwap<Reporter>> =
     Lazy::new(|| ArcSwap::from_pointee(Reporter::default()));
 
@@ -285,7 +287,7 @@ impl Collector {
 
     /// The statistics collection handler. It will collect statistics
     /// for `address_id`s starting at 0 up to `addresses`.
-    pub async fn collect(&mut self, addresses: usize) {
+    pub async fn collect(&mut self) {
         info!("Events reporter started");
 
         let stats_template = HashMap::from([
@@ -329,6 +331,7 @@ impl Collector {
                 tokio::time::interval(tokio::time::Duration::from_millis(STAT_PERIOD / 15));
             loop {
                 interval.tick().await;
+                let addresses = get_pool().databases();
                 for address_id in 0..addresses {
                     let _ = tx.try_send(Event {
                         name: EventName::UpdateStats,
@@ -346,6 +349,7 @@ impl Collector {
                 tokio::time::interval(tokio::time::Duration::from_millis(STAT_PERIOD));
             loop {
                 interval.tick().await;
+                let addresses = get_pool().databases();
                 for address_id in 0..addresses {
                     let _ = tx.try_send(Event {
                         name: EventName::UpdateAverages,