Refactoring

MQTTnet.Core/Client/MqttApplicationMessageReceivedEventArgs.cs

@@ -4,11 +4,14 @@ namespace MQTTnet.Core.Client
 {
     public sealed class MqttApplicationMessageReceivedEventArgs : EventArgs
     {
-        public MqttApplicationMessageReceivedEventArgs(MqttApplicationMessage applicationMessage)
+        public MqttApplicationMessageReceivedEventArgs(string clientId, MqttApplicationMessage applicationMessage)
         {
+            ClientId = clientId;
             ApplicationMessage = applicationMessage ?? throw new ArgumentNullException(nameof(applicationMessage));
         }
 
+        public string ClientId { get; }
+
         public MqttApplicationMessage ApplicationMessage { get; }
     }
 }

MQTTnet.Core/Client/MqttClient.cs

@@ -305,7 +305,7 @@ namespace MQTTnet.Core.Client
             try
             {
                 var applicationMessage = publishPacket.ToApplicationMessage();
-                ApplicationMessageReceived?.Invoke(this, new MqttApplicationMessageReceivedEventArgs(applicationMessage));
+                ApplicationMessageReceived?.Invoke(this, new MqttApplicationMessageReceivedEventArgs(_options.ClientId, applicationMessage));
             }
             catch (Exception exception)
             {

MQTTnet.Core/Client/MqttClientExtensions.cs

@@ -2,13 +2,12 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
-using MQTTnet.Core.Packets;
 
 namespace MQTTnet.Core.Client
 {
     public static class MqttClientExtensions
     {
-        public static Task PublishAsync(this IMqttClient client, params MqttApplicationMessage[] applicationMessages)
+        public static Task PublishAsync(this IApplicationMessagePublisher client, params MqttApplicationMessage[] applicationMessages)
         {
             if (client == null) throw new ArgumentNullException(nameof(client));
             if (applicationMessages == null) throw new ArgumentNullException(nameof(applicationMessages));

MQTTnet.Core/Server/IMqttServer.cs

@@ -1,18 +1,16 @@
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
+using MQTTnet.Core.Client;
 
 namespace MQTTnet.Core.Server
 {
-    public interface IMqttServer
+    public interface IMqttServer : IApplicationMessageReceiver, IApplicationMessagePublisher
     {
         event EventHandler<MqttClientConnectedEventArgs> ClientConnected;
         event EventHandler<MqttClientDisconnectedEventArgs> ClientDisconnected;
 
-        event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
-
         IList<ConnectedMqttClient> GetConnectedClients();
-        void Publish(MqttApplicationMessage applicationMessage);
 
         Task StartAsync();
         Task StopAsync();

MQTTnet.Core/Server/MqttApplicationMessageReceivedEventArgs.cs

@@ -1,17 +0,0 @@
-using System;
-
-namespace MQTTnet.Core.Server
-{
-    public sealed class MqttApplicationMessageReceivedEventArgs : EventArgs
-    {
-        public MqttApplicationMessageReceivedEventArgs(string clientId, MqttApplicationMessage applicationMessage)
-        {
-            ClientId = clientId;
-            ApplicationMessage = applicationMessage ?? throw new ArgumentNullException(nameof(applicationMessage));
-        }
-
-        public string ClientId { get; }
-
-        public MqttApplicationMessage ApplicationMessage { get; }
-    }
-}

MQTTnet.Core/Server/MqttClientSessionsManager.cs

@@ -11,6 +11,7 @@ using MQTTnet.Core.Protocol;
 using MQTTnet.Core.Serializer;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using MQTTnet.Core.Client;
 
 namespace MQTTnet.Core.Server
 {
@@ -28,9 +29,9 @@ namespace MQTTnet.Core.Server
             _mqttClientSesssionFactory = mqttClientSesssionFactory ?? throw new ArgumentNullException(nameof(mqttClientSesssionFactory));
         }
 
-        public event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
         public event EventHandler<MqttClientConnectedEventArgs> ClientConnected;
         public event EventHandler<MqttClientDisconnectedEventArgs> ClientDisconnected;
+        public event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
 
         public MqttClientRetainedMessagesManager RetainedMessagesManager { get; }
         public MqttServerOptions Options { get; }

MQTTnet.Core/Server/MqttServer.cs

@@ -6,6 +6,7 @@ using MQTTnet.Core.Adapter;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using System.Linq;
+using MQTTnet.Core.Client;
 
 namespace MQTTnet.Core.Server
 {
@@ -45,12 +46,22 @@ namespace MQTTnet.Core.Server
         public event EventHandler<MqttClientDisconnectedEventArgs> ClientDisconnected;
         public event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
 
-        public void Publish(MqttApplicationMessage applicationMessage)
+        public Task PublishAsync(IEnumerable<MqttApplicationMessage> applicationMessages)
         {
-            if (applicationMessage == null) throw new ArgumentNullException(nameof(applicationMessage));
+            if (applicationMessages == null) throw new ArgumentNullException(nameof(applicationMessages));
 
-            _options.ApplicationMessageInterceptor?.Invoke(applicationMessage);
+            if (_cancellationTokenSource == null)
-            _clientSessionsManager.DispatchApplicationMessage(null, applicationMessage);
+            {
+                throw new InvalidOperationException("The server is not started.");
+            }
+
+            foreach (var applicationMessage in applicationMessages)
+            {
+                _options.ApplicationMessageInterceptor?.Invoke(applicationMessage);
+                _clientSessionsManager.DispatchApplicationMessage(null, applicationMessage);
+            }
+            
+            return Task.FromResult(0);
         }
 
         public async Task StartAsync()

MQTTnet.Core/Server/MqttServerOptions.cs

@@ -4,7 +4,7 @@ using MQTTnet.Core.Protocol;
 
 namespace MQTTnet.Core.Server
 {
-    public sealed class MqttServerOptions
+    public class MqttServerOptions
     {
         public MqttServerDefaultEndpointOptions DefaultEndpointOptions { get; } = new MqttServerDefaultEndpointOptions();
 

Tests/MQTTnet.Core.Tests/MqttServerTests.cs

@@ -122,7 +122,7 @@ namespace MQTTnet.Core.Tests
             var message = new MqttApplicationMessageBuilder().WithTopic("a").WithAtLeastOnceQoS().Build();
             await c1.SubscribeAsync(new TopicFilter("a", MqttQualityOfServiceLevel.AtLeastOnce));
 
-            s.Publish(message);
+            s.PublishAsync(message).Wait();
             await Task.Delay(500);
 
             await s.StopAsync();
@@ -180,7 +180,13 @@ namespace MQTTnet.Core.Tests
         public async Task MqttServer_ClearRetainedMessage()
         {
             var serverAdapter = new TestMqttServerAdapter();
-            var s = new MqttFactory().CreateMqttServer();
+            var services = new ServiceCollection()
+                .AddLogging()
+                .AddMqttServer() // TODO: Is there maybe an easier way for the library user to set the options?
+                .AddSingleton<IMqttServerAdapter>(serverAdapter)
+                .BuildServiceProvider();
+
+            var s = new MqttFactory(services).CreateMqttServer();
             await s.StartAsync();
 
             var c1 = await serverAdapter.ConnectTestClient(s, "c1");
@@ -207,11 +213,12 @@ namespace MQTTnet.Core.Tests
 
             var serverAdapter = new TestMqttServerAdapter();
             var services = new ServiceCollection()
-                .AddMqttServer(options => options.Storage = storage)
+                .AddLogging()
+                .AddMqttServer(options => options.Storage = storage) // TODO: Is there maybe an easier way for the library user to set the options?
                 .AddSingleton<IMqttServerAdapter>(serverAdapter)
                 .BuildServiceProvider();
 
-            var s = new MqttFactory().CreateMqttServer();
+            var s = new MqttFactory(services).CreateMqttServer(); // TODO: Like here?
             await s.StartAsync();
 
             var c1 = await serverAdapter.ConnectTestClient(s, "c1");
@@ -246,6 +253,7 @@ namespace MQTTnet.Core.Tests
 
             var serverAdapter = new TestMqttServerAdapter();
             var services = new ServiceCollection()
+                .AddLogging()
                 .AddMqttServer(options => options.ApplicationMessageInterceptor = Interceptor)
                 .AddSingleton<IMqttServerAdapter>(serverAdapter)
                 .BuildServiceProvider();

Tests/MQTTnet.TestApp.AspNetCore2/Startup.cs

@@ -8,6 +8,7 @@ using Microsoft.Extensions.FileProviders;
 using Microsoft.Extensions.Logging;
 using MQTTnet.AspnetCore;
 using MQTTnet.Core;
+using MQTTnet.Core.Client;
 
 namespace MQTTnet.TestApp.AspNetCore2
 {
@@ -29,7 +30,7 @@ namespace MQTTnet.TestApp.AspNetCore2
 
                 while (true)
                 {
-                    server.Publish(msg.Build());
+                    server.PublishAsync(msg.Build()).Wait();
                     await Task.Delay(TimeSpan.FromSeconds(2));
                     msg.WithPayload("Mqtt is still awesome at " + DateTime.Now);
                 }