Add new interface for application message receivers

MQTTnet.Core/Client/IApplicationMessageReceiver.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace MQTTnet.Core.Client
+{
+    public interface IApplicationMessageReceiver
+    {
+        event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
+    }
+}

MQTTnet.Core/Client/IMqttClient.cs

@@ -5,11 +5,10 @@ using MQTTnet.Core.Packets;
 
 namespace MQTTnet.Core.Client
 {
-    public interface IMqttClient
+    public interface IMqttClient : IApplicationMessageReceiver
     {
         bool IsConnected { get; }
 
-        event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
         event EventHandler<MqttClientConnectedEventArgs> Connected;
         event EventHandler<MqttClientDisconnectedEventArgs> Disconnected;
 

MQTTnet.Core/ManagedClient/ManagedMqttClient.cs

@@ -12,7 +12,7 @@ using MQTTnet.Core.Protocol;
 
 namespace MQTTnet.Core.ManagedClient
 {
-    public class ManagedMqttClient
+    public class ManagedMqttClient : IApplicationMessageReceiver
     {
         private readonly ManagedMqttClientStorageManager _storageManager = new ManagedMqttClientStorageManager();
         private readonly BlockingCollection<MqttApplicationMessage> _messageQueue = new BlockingCollection<MqttApplicationMessage>();
@@ -38,12 +38,12 @@ namespace MQTTnet.Core.ManagedClient
             _mqttClient.ApplicationMessageReceived += OnApplicationMessageReceived;
         }
 
+        public bool IsConnected => _mqttClient.IsConnected;
+
         public event EventHandler<MqttClientConnectedEventArgs> Connected;
         public event EventHandler<MqttClientDisconnectedEventArgs> Disconnected;
         public event EventHandler<MqttApplicationMessageReceivedEventArgs> ApplicationMessageReceived;
 
-        public bool IsConnected => _mqttClient.IsConnected;
-
         public async Task StartAsync(IManagedMqttClientOptions options)
         {
             if (options == null) throw new ArgumentNullException(nameof(options));
@@ -242,22 +242,6 @@ namespace MQTTnet.Core.ManagedClient
             }
         }
 
-        private async Task SaveAsync(List<MqttApplicationMessage> messages)
-        {
-            if (messages == null)
-            {
-                return;
-            }
-
-            var storage = _options.Storage;
-            if (storage != null)
-            {
-                return;
-            }
-
-            await _options.Storage.SaveQueuedMessagesAsync(messages);
-        }
-
         private async Task PushSubscriptionsAsync()
         {
             _trace.Information(nameof(ManagedMqttClient), "Synchronizing subscriptions");