Expose custom session items in session status.

Source/MQTTnet/Server/MqttClientSession.cs

@@ -8,9 +8,9 @@ namespace MQTTnet.Server
 {
     public class MqttClientSession
     {
-        private readonly IMqttNetLogger _logger;
+        readonly IMqttNetLogger _logger;
 
-        private readonly DateTime _createdTimestamp = DateTime.UtcNow;
+        readonly DateTime _createdTimestamp = DateTime.UtcNow;
 
         public MqttClientSession(string clientId, IDictionary<object, object> items, MqttServerEventDispatcher eventDispatcher, IMqttServerOptions serverOptions, IMqttNetLogger logger)
         {
@@ -73,6 +73,7 @@ namespace MQTTnet.Server
             status.ClientId = ClientId;
             status.CreatedTimestamp = _createdTimestamp;
             status.PendingApplicationMessagesCount = ApplicationMessagesQueue.Count;
+            status.Items = Items;
         }
     }
 }

Source/MQTTnet/Server/Status/IMqttClientStatus.cs

@@ -1,6 +1,6 @@
-using System;
+using MQTTnet.Formatter;
+using System;
 using System.Threading.Tasks;
-using MQTTnet.Formatter;
 
 namespace MQTTnet.Server.Status
 {
@@ -9,7 +9,7 @@ namespace MQTTnet.Server.Status
         string ClientId { get; }
 
         string Endpoint { get; }
-        
+
         MqttProtocolVersion ProtocolVersion { get; }
 
         DateTime LastPacketReceivedTimestamp { get; }
@@ -29,7 +29,7 @@ namespace MQTTnet.Server.Status
         long BytesSent { get; }
 
         long BytesReceived { get; }
-        
+
         Task DisconnectAsync();
 
         void ResetStatistics();

Source/MQTTnet/Server/Status/IMqttSessionStatus.cs

@@ -1,12 +1,15 @@
-using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 
 namespace MQTTnet.Server.Status
 {
     public interface IMqttSessionStatus
     {
-        string ClientId { get; set; }
+        string ClientId { get; }
 
-        long PendingApplicationMessagesCount { get; set; }
+        long PendingApplicationMessagesCount { get; }
+
+        IDictionary<object, object> Items { get; }
 
         Task ClearPendingApplicationMessagesAsync();
 

Source/MQTTnet/Server/Status/MqttClientStatus.cs

@@ -1,16 +1,16 @@
-using System;
+using MQTTnet.Formatter;
+using System;
 using System.Threading.Tasks;
-using MQTTnet.Formatter;
 
 namespace MQTTnet.Server.Status
 {
     public class MqttClientStatus : IMqttClientStatus
     {
-        private readonly MqttClientConnection _connection;
+        readonly MqttClientConnection _connection;
 
         public MqttClientStatus(MqttClientConnection connection)
         {
-            _connection = connection;
+            _connection = connection ?? throw new ArgumentNullException(nameof(connection));
         }
 
         public string ClientId { get; set; }

Source/MQTTnet/Server/Status/MqttSessionStatus.cs

@@ -1,12 +1,13 @@
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace MQTTnet.Server.Status
 {
     public class MqttSessionStatus : IMqttSessionStatus
     {
-        private readonly MqttClientSession _session;
-        private readonly MqttClientSessionsManager _sessionsManager;
+        readonly MqttClientSession _session;
+        readonly MqttClientSessionsManager _sessionsManager;
 
         public MqttSessionStatus(MqttClientSession session, MqttClientSessionsManager sessionsManager)
         {
@@ -17,14 +18,16 @@ namespace MQTTnet.Server.Status
         public string ClientId { get; set; }
 
         public long PendingApplicationMessagesCount { get; set; }
-    
+
         public DateTime CreatedTimestamp { get; set; }
 
+        public IDictionary<object, object> Items { get; set; }
+
         public Task DeleteAsync()
         {
             return _sessionsManager.DeleteSessionAsync(ClientId);
         }
-        
+
         public Task ClearPendingApplicationMessagesAsync()
         {
             _session.ApplicationMessagesQueue.Clear();