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Packages/com.singularitygroup.hotreload/Editor/ServerHealthCheck.cs

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+using System;
+using System.IO;
+using SingularityGroup.HotReload.Editor.Cli;
+
+namespace SingularityGroup.HotReload.Editor {
+    public class ServerHealthCheck : IServerHealthCheckInternal {
+        private static readonly TimeSpan heartBeatTimeout = TimeSpan.FromMilliseconds(5000);
+        internal static readonly IServerHealthCheckInternal instance = new ServerHealthCheck();
+        
+        public static IServerHealthCheck I => instance;
+        public static TimeSpan HeartBeatTimeout => heartBeatTimeout;
+        
+        ServerHealthCheck() { }
+        
+        /// <summary>
+        /// Whether or not the server is running and responsive
+        /// </summary>
+        public bool IsServerHealthy { get; private set; }
+
+        void IServerHealthCheckInternal.CheckHealth() {
+            var fi = new FileInfo(Path.Combine(CliUtils.GetCliTempDir(), "health"));
+            IsServerHealthy = fi.Exists && DateTime.UtcNow - fi.LastWriteTimeUtc < heartBeatTimeout;
+        }
+    }
+}