From ab07ac0389e323db62c2c3114a34ec3384678e22 Mon Sep 17 00:00:00 2001
From: benbierens <thatbenbierens@gmail.com>
Date: Thu, 4 May 2023 09:16:15 +0200
Subject: [PATCH] Fixes issue where multiple instances of ApplicaitonLifecycle
 are created.

---
 KubernetesWorkflow/ApplicationLifecycle.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/KubernetesWorkflow/ApplicationLifecycle.cs b/KubernetesWorkflow/ApplicationLifecycle.cs
index 5289573..7d6fb3d 100644
--- a/KubernetesWorkflow/ApplicationLifecycle.cs
+++ b/KubernetesWorkflow/ApplicationLifecycle.cs
@@ -4,6 +4,7 @@ namespace KubernetesWorkflow
 {
     public class ApplicationLifecycle
     {
+        private static object instanceLock = new object();
         private static ApplicationLifecycle? instance;
         private readonly NumberSource servicePortNumberSource = new NumberSource(30001);
         private readonly NumberSource namespaceNumberSource = new NumberSource(0);
@@ -18,8 +19,11 @@ namespace KubernetesWorkflow
             // and persists for the entire application lifecycle.
             get
             {
-                if (instance == null) instance = new ApplicationLifecycle();
-                return instance;
+                lock (instanceLock)
+                {
+                    if (instance == null) instance = new ApplicationLifecycle();
+                    return instance;
+                }
             }
         }