From 1061758f95b7ba633e6bcc2c3556b42f033b1a79 Mon Sep 17 00:00:00 2001
From: Roy Ben-Shabat <Roy@Twine-s.com>
Date: Mon, 26 Mar 2018 14:21:53 +0300
Subject: Working on logging module !

Modified PID Control Table.
---
 .../EventLogging/DefaultEventLogger.cs             | 92 +++++++++++++++-------
 1 file changed, 65 insertions(+), 27 deletions(-)

(limited to 'Software/Visual_Studio/MachineStudio/Tango.MachineStudio.Common/EventLogging/DefaultEventLogger.cs')

diff --git a/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.Common/EventLogging/DefaultEventLogger.cs b/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.Common/EventLogging/DefaultEventLogger.cs
index 0f19d3b6d..d3fb0897f 100644
--- a/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.Common/EventLogging/DefaultEventLogger.cs
+++ b/Software/Visual_Studio/MachineStudio/Tango.MachineStudio.Common/EventLogging/DefaultEventLogger.cs
@@ -34,13 +34,14 @@ namespace Tango.MachineStudio.Common.EventLogging
         private Dictionary<EventTypes, BL.Entities.EventType> _eventTypesGuids;
         private String _hostName;
         private bool _isInitialized;
+        private List<MachinesEvent> _pendingEvents;
 
         #region Events
 
         /// <summary>
         /// Occurs when a new machine event has been logged.
         /// </summary>
-        public event EventHandler<MachinesEvent> NewLog; 
+        public event EventHandler<MachinesEvent> NewLog;
 
         #endregion
 
@@ -56,6 +57,7 @@ namespace Tango.MachineStudio.Common.EventLogging
             _hostName = Environment.MachineName;
 
             _events = new ConcurrentQueue<MachinesEvent>();
+            _pendingEvents = new List<MachinesEvent>();
 
             _eventTypesGuids = new Dictionary<EventTypes, BL.Entities.EventType>();
 
@@ -90,7 +92,7 @@ namespace Tango.MachineStudio.Common.EventLogging
                     _eventTypesGuids.Add((EventTypes)type.Code, type);
                 }
 
-                _isInitialized = true; 
+                _isInitialized = true;
             }
         }
 
@@ -176,15 +178,33 @@ namespace Tango.MachineStudio.Common.EventLogging
         /// <param name="machineEvent">The machine event.</param>
         public void Log(MachinesEvent machineEvent)
         {
-            machineEvent.MachineGuid = _application.ConnectedMachine != null ? _application.ConnectedMachine.Guid : null;
-            machineEvent.UserGuid = _authentication.CurrentUser != null ? _authentication.CurrentUser.Guid : null;
             machineEvent.HostName = _hostName;
             machineEvent.EventType = _eventTypesGuids[machineEvent.Type];
 
-            LogManager.Log("Logging event " + machineEvent.EventType.Name + " - " + machineEvent.Description);
-            _events.Enqueue(machineEvent);
+            if (_application.ConnectedMachine == null || _authentication.CurrentUser == null)
+            {
+                _pendingEvents.Add(machineEvent);
+            }
+            else
+            {
+                if (_pendingEvents.Count > 0)
+                {
+                    var pending = _pendingEvents.ToList();
+                    _pendingEvents.Clear();
+
+                    foreach (var ev in pending)
+                    {
+                        Log(ev);
+                    }
+                }
 
-            NewLog?.Invoke(this, machineEvent);
+                LogManager.Log("Logging event " + machineEvent.EventType.Name + " - " + machineEvent.Description);
+                machineEvent.MachineGuid = _application.ConnectedMachine.Guid;
+                machineEvent.UserGuid = _authentication.CurrentUser.Guid;
+                machineEvent.User = _authentication.CurrentUser;
+                _events.Enqueue(machineEvent);
+                NewLog?.Invoke(this, machineEvent);
+            }
         }
 
         /// <summary>
@@ -222,6 +242,16 @@ namespace Tango.MachineStudio.Common.EventLogging
             Log(EventTypes.ApplicationException, exception.ToString());
         }
 
+        /// <summary>
+        /// Logs the specified exception using the <see cref="EventTypes.ApplicationException" />.
+        /// </summary>
+        /// <param name="exception">The exception.</param>
+        /// <param name="description"></param>
+        public void Log(Exception exception, string description)
+        {
+            Log(EventTypes.ApplicationException, description + Environment.NewLine + exception.ToString());
+        }
+
         /// <summary>
         /// Logs the specified message using the <see cref="EventTypes.ApplicationInformation"/>.
         /// </summary>
@@ -238,32 +268,40 @@ namespace Tango.MachineStudio.Common.EventLogging
         {
             while (true)
             {
-                bool _saveChanges = false;
+                FlushAll();
+                Thread.Sleep(5000);
+            }
+        }
 
-                while (_events.Count > 0)
-                {
-                    MachinesEvent ev = null;
+        /// <summary>
+        /// Immediately saves all pending events to database.
+        /// </summary>
+        public void FlushAll()
+        {
+            bool _saveChanges = false;
 
-                    if (_events.TryDequeue(out ev))
-                    {
-                        _db.MachinesEvents.Add(ev);
-                        _saveChanges = true;
-                    }
-                }
+            while (_events.Count > 0)
+            {
+                MachinesEvent ev = null;
 
-                if (_saveChanges)
+                if (_events.TryDequeue(out ev))
                 {
-                    try
-                    {
-                        _db.SaveChanges();
-                    }
-                    catch (Exception ex)
-                    {
-                        LogManager.Log(ex, "Error saving machine event to database.");
-                    }
+                    ev.User = null;
+                    _db.MachinesEvents.Add(ev);
+                    _saveChanges = true;
                 }
+            }
 
-                Thread.Sleep(5000);
+            if (_saveChanges)
+            {
+                try
+                {
+                    _db.SaveChanges();
+                }
+                catch (Exception ex)
+                {
+                    LogManager.Log(ex, "Error saving machine event to database.");
+                }
             }
         }
 
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