Add support for retained application messages

Tests/MQTTnet.Core.Tests/MqttServerTests.cs

@@ -49,7 +49,7 @@ namespace MQTTnet.Core.Tests
         public async Task MqttServer_WillMessage()
         {
             var s = new MqttServer(new MqttServerOptions(), new List<IMqttServerAdapter> { new TestMqttServerAdapter() });
-            s.Start();
+            s.StartAsync();
 
             var willMessage = new MqttApplicationMessage("My/last/will", new byte[0], MqttQualityOfServiceLevel.AtMostOnce, false);
             var c1 = ConnectTestClient("c1", null, s);
@@ -63,7 +63,7 @@ namespace MQTTnet.Core.Tests
 
             await Task.Delay(1000);
 
-            s.Stop();
+            s.StopAsync();
 
             Assert.AreEqual(1, receivedMessagesCount);
         }
@@ -72,7 +72,7 @@ namespace MQTTnet.Core.Tests
         public async Task MqttServer_Unsubscribe()
         {
             var s = new MqttServer(new MqttServerOptions(), new List<IMqttServerAdapter> { new TestMqttServerAdapter() });
-            s.Start();
+            s.StartAsync();
 
             var c1 = ConnectTestClient("c1", null, s);
             var c2 = ConnectTestClient("c2", null, s);
@@ -97,7 +97,7 @@ namespace MQTTnet.Core.Tests
             await Task.Delay(500);
             Assert.AreEqual(1, receivedMessagesCount);
 
-            s.Stop();
+            s.StopAsync();
             await Task.Delay(500);
 
             Assert.AreEqual(1, receivedMessagesCount);
@@ -107,7 +107,7 @@ namespace MQTTnet.Core.Tests
         public async Task MqttServer_Publish()
         {
             var s = new MqttServer(new MqttServerOptions(), new List<IMqttServerAdapter> { new TestMqttServerAdapter() });
-            s.Start();
+            s.StartAsync();
 
             var c1 = ConnectTestClient("c1", null, s);
 
@@ -120,7 +120,7 @@ namespace MQTTnet.Core.Tests
             s.Publish(message);
             await Task.Delay(500);
 
-            s.Stop();
+            s.StopAsync();
 
             Assert.AreEqual(1, receivedMessagesCount);
         }
@@ -146,7 +146,7 @@ namespace MQTTnet.Core.Tests
             int expectedReceivedMessagesCount)
         {
             var s = new MqttServer(new MqttServerOptions(), new List<IMqttServerAdapter> { new TestMqttServerAdapter() });
-            s.Start();
+            s.StartAsync();
 
             var c1 = ConnectTestClient("c1", null, s);
             var c2 = ConnectTestClient("c2", null, s);
@@ -162,7 +162,7 @@ namespace MQTTnet.Core.Tests
 
             await Task.Delay(500);
 
-            s.Stop();
+            s.StopAsync();
 
             Assert.AreEqual(expectedReceivedMessagesCount, receivedMessagesCount);
         }

Tests/MQTTnet.Core.Tests/TestMqttServerAdapter.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using MQTTnet.Core.Adapter;
 using MQTTnet.Core.Server;
 
@@ -13,12 +14,14 @@ namespace MQTTnet.Core.Tests
             ClientConnected?.Invoke(this, eventArgs);
         }
 
-        public void Start(MqttServerOptions options)
+        public Task StartAsync(MqttServerOptions options)
         {
+            return Task.FromResult(0);
         }
 
-        public void Stop()
-        {                 
+        public Task StopAsync()
+        {
+            return Task.FromResult(0);
         }
     }
 }

Tests/MQTTnet.TestApp.NetCore/Program.cs

@@ -153,12 +153,12 @@ namespace MQTTnet.TestApp.NetCore
                 };
 
                 var mqttServer = new MqttServerFactory().CreateMqttServer(options);
-                mqttServer.Start();
+                mqttServer.StartAsync();
 
                 Console.WriteLine("Press any key to exit.");
                 Console.ReadLine();
 
-                mqttServer.Stop();
+                mqttServer.StopAsync();
             }
             catch (Exception e)
             {

Tests/MQTTnet.TestApp.NetFramework/PerformanceTest.cs

@@ -167,7 +167,7 @@ namespace MQTTnet.TestApp.NetFramework
            });
         }
 
-        private static void RunServerAsync()
+        private static async Task RunServerAsync()
         {
             try
             {
@@ -201,12 +201,12 @@ namespace MQTTnet.TestApp.NetFramework
                         stopwatch.Restart();
                     }
                 };
-                mqttServer.Start();
+                await mqttServer.StartAsync();
 
                 Console.WriteLine("Press any key to exit.");
                 Console.ReadLine();
 
-                mqttServer.Stop();
+                await mqttServer.StopAsync();
             }
             catch (Exception e)
             {

Tests/MQTTnet.TestApp.NetFramework/Program.cs

@@ -121,7 +121,7 @@ namespace MQTTnet.TestApp.NetFramework
             }
         }
 
-        private static void RunServerAsync(string[] arguments)
+        private static async Task RunServerAsync(string[] arguments)
         {
             MqttTrace.TraceMessagePublished += (s, e) =>
             {
@@ -151,12 +151,12 @@ namespace MQTTnet.TestApp.NetFramework
                 };
 
                 var mqttServer = new MqttServerFactory().CreateMqttServer(options);
-                mqttServer.Start();
+                await mqttServer.StartAsync();
 
                 Console.WriteLine("Press any key to exit.");
                 Console.ReadLine();
 
-                mqttServer.Stop();
+                await mqttServer.StopAsync();
             }
             catch (Exception e)
             {
@@ -166,4 +166,4 @@ namespace MQTTnet.TestApp.NetFramework
             Console.ReadLine();
         }
     }
-}
+}