From 49d94dae1d753c1f3349be7ea9bc7e7978c0af15 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Fri, 21 Apr 2023 14:14:07 +0200
Subject: [PATCH] less noise

---
 src/autodiscovery.rs | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/src/autodiscovery.rs b/src/autodiscovery.rs
index 7b61da6..86276c1 100644
--- a/src/autodiscovery.rs
+++ b/src/autodiscovery.rs
@@ -13,13 +13,13 @@ use tracing::*;
 
 use df_consul::*;
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
 pub struct DiplonatAutodiscoveryResult<A> {
     pub timestamp: u64,
     pub address: Option<A>,
 }
 
-#[derive(Default, Debug)]
+#[derive(Default, Debug, Eq, PartialEq)]
 pub struct AutodiscoveredAddresses {
     pub ipv4: HashMap<String, DiplonatAutodiscoveryResult<Ipv4Addr>>,
     pub ipv6: HashMap<String, DiplonatAutodiscoveryResult<Ipv6Addr>>,
@@ -30,6 +30,7 @@ pub fn watch_autodiscovered_ips(
     mut must_exit: watch::Receiver<bool>,
 ) -> watch::Receiver<Arc<AutodiscoveredAddresses>> {
     let (tx, rx) = watch::channel(Arc::new(AutodiscoveredAddresses::default()));
+    let rx2 = rx.clone();
 
     tokio::spawn(async move {
         let mut last_index = None;
@@ -66,9 +67,13 @@ pub fn watch_autodiscovered_ips(
                 }
             }
 
-            debug!("Autodiscovered addresses fetched from Consul: {:?}", addresses);
+            if addresses.strip_timestamps() != rx2.borrow().strip_timestamps() {
+                addresses.dump();
+            }
+
             if tx.send(Arc::new(addresses)).is_err() {
                 info!("Autodiscovered addresses watcher terminating");
+                return;
             }
         }
     });
@@ -103,6 +108,24 @@ fn parse_autodiscovered_address(
     Ok(())
 }
 
+impl AutodiscoveredAddresses {
+    fn strip_timestamps(&self) -> (HashMap<&str, Option<Ipv4Addr>>, HashMap<&str, Option<Ipv6Addr>>) {
+        (self.ipv4.iter().map(|(k, v)| (k.as_str(), v.address)).collect(),
+         self.ipv6.iter().map(|(k, v)| (k.as_str(), v.address)).collect())
+    }
+
+    fn dump(&self) {
+        println!("---- Autodiscovered addresses (fetched from DiploNAT): ----");
+        for (k, v) in self.ipv4.iter() {
+            println!("   IPv4 {} {} {:?}", k, v.timestamp, v.address);
+        }
+        for (k, v) in self.ipv6.iter() {
+            println!("   IPv6 {} {} {:?}", k, v.timestamp, v.address);
+        }
+        println!("");
+    }
+}
+
 pub fn timestamp() -> u64 {
     SystemTime::now()
         .duration_since(SystemTime::UNIX_EPOCH)