From 96059650709df224d4989f402f80d09fa02995fd Mon Sep 17 00:00:00 2001
From: Jonathan Mercier-Ganady <jonathan.mercier.ganady@ably.com>
Date: Thu, 8 Oct 2020 17:45:47 +0100
Subject: [PATCH] Expose server listen port

---
 server/server.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/server/server.go b/server/server.go
index 2945e510..b66993a4 100644
--- a/server/server.go
+++ b/server/server.go
@@ -259,6 +259,19 @@ func (s *Server) IsRunning() bool {
 	return s.running
 }
 
+// GetListenPort returns the port the server is listening to. Returns 0 if the
+// server is not listening.
+func (s *Server) GetListenPort() int {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	if s.listener == nil {
+		return 0
+	}
+
+	return s.listener.Addr().(*net.TCPAddr).Port
+}
+
 // recoverAndPersistState recovers any existing server metadata state from disk
 // to initialize the server then writes the metadata back to disk.
 func (s *Server) recoverAndPersistState() error {