upd

TestApp/Program.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Net;
-using ZeroLevel;
+using ZeroLevel;
 
 namespace TestApp
 {

ZeroLevel.Discovery/Program.cs

@@ -1,14 +1,38 @@
-namespace ZeroLevel.Discovery
+using System;
+using Topshelf;
+using static ZeroLevel.Bootstrap;
+
+namespace ZeroLevel.Discovery
 {
     internal static class Program
     {
         private static void Main(string[] args)
         {
-            Bootstrap.Startup<DiscoveryService>(args)
-                .Run()
-                .WaitWhileStatus(ZeroServiceStatus.Running)
-                .Stop();
-            Bootstrap.Shutdown();
+            IServiceExecution se = null;
+            HostFactory.Run(x =>
+            {
+                x.StartAutomatically();
+                x.Service<BootstrapFluent>(s =>
+                {
+                    s.ConstructUsing(name => Bootstrap.Startup<DiscoveryService>(args));
+                    s.WhenStopped(tc => { tc.Stop(); Bootstrap.Shutdown(); });
+                    s.WhenStarted(tc => { se = tc.Run(); });
+                });
+                x.RunAsLocalSystem();
+
+                x.SetDescription("Discovery");
+                x.SetDisplayName("Discovery");
+                x.SetServiceName("Discovery");
+
+                x.OnException(ex =>
+                {
+                    Log.Error(ex, "Service exception");
+                });
+            });
+            if (Environment.UserInteractive && args?.Length < 1)
+            {
+                se?.WaitWhileStatus(ZeroServiceStatus.Running);
+            }
         }
     }
 }

ZeroLevel.Discovery/Properties/PublishProfiles/FolderProfile.pubxml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121. 
+-->
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <PublishDir>bin\Release\netcoreapp2.2\publish\</PublishDir>
+  </PropertyGroup>
+</Project>

ZeroLevel.Discovery/ZeroLevel.Discovery.csproj

@@ -7,6 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Topshelf" Version="4.2.1" />
   </ItemGroup>
 
   <ItemGroup>

ZeroLevel.SQL/Contracts/IDbProvider.cs

@@ -18,5 +18,8 @@ namespace ZeroLevel.SqlServer
         int ExecuteNonResult(string query);
         int ExecuteNonResult(string query, DbParameter[] par);
         void LazySelect(string query, DbParameter[] par, Func<DbDataReader, bool> readHandler, int timeout);
+
+        T Read<T>(DbDataReader reader, int index);
+        T Read<T>(DbDataReader reader, string name);
     }
 }

ZeroLevel.SQL/SqlDbProvider.cs

@@ -366,5 +366,16 @@ namespace ZeroLevel.SqlServer
             }
         }
         #endregion
+
+        public T Read<T>(DbDataReader reader, int index)
+        {
+            if (reader[index] == DBNull.Value) return default(T);
+            return (T)Convert.ChangeType(reader[index], typeof(T));
+        }
+        public T Read<T>(DbDataReader reader, string name)
+        {
+            if (reader[name] == DBNull.Value) return default(T);
+            return (T)Convert.ChangeType(reader[name], typeof(T));
+        }
     }
 }

ZeroLevel/Services/BaseZeroService.cs

@@ -46,20 +46,30 @@ namespace ZeroLevel.Services.Applications
 
         public void ReadServiceInfo()
         {
-            this.Name = ReadName();
-            this.Key = ReadKey();
-            this.Version = ReadVersion();
-            this.Group = ReadServiceGroup();
-            this.Type = ReadServiceType();
+            if (string.IsNullOrWhiteSpace(this.Name))
+                this.Name = ReadName();
+            if (string.IsNullOrWhiteSpace(this.Key))
+                this.Key = ReadKey();
+            if (string.IsNullOrWhiteSpace(this.Version))
+                this.Version = ReadVersion();
+            if (string.IsNullOrWhiteSpace(this.Group))
+                this.Group = ReadServiceGroup();
+            if (string.IsNullOrWhiteSpace(this.Type))
+                this.Type = ReadServiceType();
         }
 
         public void ReadServiceInfo(IConfigurationSet set)
         {
-            this.Name = ReadName(set);
-            this.Key = ReadKey(set);
-            this.Version = ReadVersion(set);
-            this.Group = ReadServiceGroup(set);
-            this.Type = ReadServiceType(set);
+            if (string.IsNullOrWhiteSpace(this.Name))
+                this.Name = ReadName(set);
+            if (string.IsNullOrWhiteSpace(this.Key))
+                this.Key = ReadKey(set);
+            if (string.IsNullOrWhiteSpace(this.Version))
+                this.Version = ReadVersion(set);
+            if (string.IsNullOrWhiteSpace(this.Group))
+                this.Group = ReadServiceGroup(set);
+            if (string.IsNullOrWhiteSpace(this.Type))
+                this.Type = ReadServiceType(set);
         }
 
         private string ReadName(IConfigurationSet set = null)
@@ -128,6 +138,7 @@ namespace ZeroLevel.Services.Applications
             if (_state == ZeroServiceStatus.Running
                || _state == ZeroServiceStatus.Initialized)
             {
+                ReadServiceInfo();
                 _exhange.UseDiscovery();
             }
         }
@@ -137,6 +148,7 @@ namespace ZeroLevel.Services.Applications
             if (_state == ZeroServiceStatus.Running
                || _state == ZeroServiceStatus.Initialized)
             {
+                ReadServiceInfo();
                 _exhange.UseDiscovery(endpoint);
             }
         }
@@ -146,6 +158,7 @@ namespace ZeroLevel.Services.Applications
             if (_state == ZeroServiceStatus.Running
                || _state == ZeroServiceStatus.Initialized)
             {
+                ReadServiceInfo();
                 _exhange.UseDiscovery(endpoint);
             }
         }

ZeroLevel/Services/Network/Contracts/IExchange.cs

@@ -15,6 +15,7 @@ namespace ZeroLevel.Network
         IRouter UseHost(IPEndPoint endpoint);
 
         IServiceRoutesStorage RoutesStorage { get; }
+        IServiceRoutesStorage DiscoveryStorage { get; }
 
         ExClient GetConnection(string alias);
         ExClient GetConnection(IPEndPoint endpoint);

ZeroLevel/Services/Network/Contracts/IServiceRoutesStorage.cs

@@ -15,6 +15,8 @@ namespace ZeroLevel.Network
 
         void Remove(IPEndPoint endpoint);
 
+        IEnumerable<KeyValuePair<string, IPEndPoint>> GetAll();
+
         InvokeResult<IPEndPoint> Get(string key);
         InvokeResult<IEnumerable<IPEndPoint>> GetAll(string key);
         InvokeResult<IPEndPoint> GetByType(string type);

ZeroLevel/Services/Network/Exchange.cs

@@ -20,6 +20,7 @@ namespace ZeroLevel.Network
         private readonly ExClientServerCachee _cachee = new ExClientServerCachee();
 
         public IServiceRoutesStorage RoutesStorage => _user_aliases;
+        public IServiceRoutesStorage DiscoveryStorage => _dicovery_aliases;
         private readonly IZeroService _owner;
 
         #region Ctor        
@@ -506,6 +507,7 @@ namespace ZeroLevel.Network
             {
                 Sheduller.Remove(_register_in_discovery_table_task);
             }
+            UpdateServiceListFromDiscovery();
             _register_in_discovery_table_task = Sheduller.RemindEvery(TimeSpan.FromMilliseconds(500), _update_discovery_table_period, RegisterServicesInDiscovery);
             _update_discovery_table_task = Sheduller.RemindEvery(TimeSpan.FromMilliseconds(750), _register_in_discovery_table_period, UpdateServiceListFromDiscovery);
         }

ZeroLevel/Services/Network/Utils/ServiceRouteStorage.cs

@@ -252,6 +252,7 @@ namespace ZeroLevel.Network
             }
             return InvokeResult.Fault<IPEndPoint>($"No endpoints by key '{key}'");
         }
+
         public InvokeResult<IEnumerable<IPEndPoint>> GetAll(string key)
         {
             key = key.ToUpperInvariant();
@@ -262,6 +263,13 @@ namespace ZeroLevel.Network
             }
             return InvokeResult.Fault<IEnumerable<IPEndPoint>>($"No endpoints by key '{key}'");
         }
+
+
+        public IEnumerable<KeyValuePair<string, IPEndPoint>> GetAll()
+        {
+            return _tableByKey.SelectMany(pair => pair.Value.Source.Select(s => new KeyValuePair<string, IPEndPoint>(pair.Key, s)));
+        }
+
         public InvokeResult<IPEndPoint> GetByType(string type)
         {
             type = type.ToUpperInvariant();

ZeroLevel/Services/Semantic/Trie.cs

@@ -1,5 +1,4 @@
-using System.Collections.Concurrent;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using ZeroLevel.Services.Serialization;