From baa5fa5f026d464b0a00133dab274f4ff93db0a0 Mon Sep 17 00:00:00 2001
From: yuanyuyuan <az6980522@gmail.com>
Date: Tue, 20 Aug 2024 17:03:24 +0800
Subject: [PATCH] refactor: demostrate how to use a background subscriber in
 the example

---
 examples/examples/z_sub_thr.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/examples/examples/z_sub_thr.rs b/examples/examples/z_sub_thr.rs
index fa78b4688a..78626d1d1d 100644
--- a/examples/examples/z_sub_thr.rs
+++ b/examples/examples/z_sub_thr.rs
@@ -78,7 +78,7 @@ fn main() {
     let key_expr = "test/thr";
 
     let mut stats = Stats::new(n);
-    let _sub = session
+    session
         .declare_subscriber(key_expr)
         .callback_mut(move |_sample| {
             stats.increment();
@@ -87,7 +87,9 @@ fn main() {
             }
         })
         .wait()
-        .unwrap();
+        .unwrap()
+        // Make the subscriber run in background, until the session is closed.
+        .background();
 
     println!("Press CTRL-C to quit...");
     std::thread::park();