From 6fb22273d15ed476ccbd3820de6af9bc0deee793 Mon Sep 17 00:00:00 2001
From: Roy Ben-Shabat <Roy@Twine-s.com>
Date: Mon, 26 Nov 2018 14:19:06 +0200
Subject: Implemented Application Initialization Error and Handling.

---
 .../PPCApplication/DefaultPPCApplicationManager.cs | 95 ++++++++++++++++------
 1 file changed, 68 insertions(+), 27 deletions(-)

(limited to 'Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs')

diff --git a/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs b/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs
index 714b83dfa..4021d89ef 100644
--- a/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs
+++ b/Software/Visual_Studio/PPC/Tango.PPC.UI/PPCApplication/DefaultPPCApplicationManager.cs
@@ -23,6 +23,7 @@ using Tango.SQLExaminer;
 using System.Data.SqlClient;
 using Tango.BL.Builders;
 using Tango.PPC.Common.Threading;
+using System.Diagnostics;
 
 namespace Tango.PPC.UI.PPCApplication
 {
@@ -63,6 +64,11 @@ namespace Tango.PPC.UI.PPCApplication
         /// </summary>
         public event EventHandler ContentRendered;
 
+        /// <summary>
+        /// Occurs when the application has encountered an error when initializing.
+        /// </summary>
+        public event EventHandler<Exception> ApplicationInitializationError;
+
         /// <summary>
         /// Gets a value indicating whether the application is shutting down.
         /// </summary>
@@ -125,46 +131,72 @@ namespace Tango.PPC.UI.PPCApplication
         {
             PPCSettings settings = null;
 
+            bool initialized = false;
+
             await Task.Factory.StartNew(() =>
             {
-                LogManager.Log("Reading PPC settings...");
-                settings = SettingsManager.Default.GetOrCreate<PPCSettings>();
+                try
+                {
+                    LogManager.Log("Reading PPC settings...");
+                    settings = SettingsManager.Default.GetOrCreate<PPCSettings>();
 
-                LogManager.Log(settings.ToJsonString());
+                    LogManager.Log(settings.ToJsonString());
 
-                LogManager.Log("Reading Core settings...");
-                var coreSettings = SettingsManager.Default.GetOrCreate<CoreSettings>();
+                    LogManager.Log("Reading Core settings...");
+                    var coreSettings = SettingsManager.Default.GetOrCreate<CoreSettings>();
 
-                if (!SettingsManager.Default.IsFileExists())
-                {
-                    LogManager.Log("Settings file does not exists. creating...");
-                    settings.Save();
-                }
+                    if (!SettingsManager.Default.IsFileExists())
+                    {
+                        LogManager.Log("Settings file does not exists. creating...");
+                        settings.Save();
+                    }
 
-                if (App.StartupArgs.Contains("-update_ok"))
-                {
-                    LogManager.Log("Application started with '-update_ok' startup arguments. The application has been successfully updated.");
-                    settings.ApplicationState = ApplicationStates.Ready;
-                    settings.Save();
-                }
+                    if (App.StartupArgs.Contains("-update_ok"))
+                    {
+                        LogManager.Log("Application started with '-update_ok' startup arguments. The application has been successfully updated.");
+                        settings.ApplicationState = ApplicationStates.Ready;
+                        settings.Save();
+                    }
 
-                if (settings.ApplicationState == ApplicationStates.Ready)
+                    if (settings.ApplicationState == ApplicationStates.Ready)
+                    {
+                        LogManager.Log("Initializing ObservablesStaticCollections...");
+                        ObservablesStaticCollections.Instance.Initialize();
+                        LogManager.Log("Loading machine from database...");
+                        _machine = new MachineBuilder(ObservablesContext.CreateDefault()).SetFirst().WithOrganization().WithConfiguration().Build();
+                    }
+
+                    initialized = true;
+                }
+                catch (Exception ex)
                 {
-                    LogManager.Log("Loading machine from database...");
-                    ObservablesStaticCollections.Instance.Initialize();
-                    _machine = new MachineBuilder(ObservablesContext.CreateDefault()).SetFirst().WithOrganization().WithConfiguration().Build();
+                    LogManager.Log(ex, "Application Initialization Error!");
+                    ApplicationInitializationError?.Invoke(this, ex);
+                    return;
                 }
             });
 
 
-            if (settings.ApplicationState == ApplicationStates.PreSetup || settings.ApplicationState == ApplicationStates.SemiSetup)
+            if (initialized)
             {
-                LogManager.Log($"The application is in {settings.ApplicationState} state. database initialization skipped. Invoking setup required event!");
-                SetupRequired?.Invoke(this, new EventArgs());
-            }
-            else
-            {
-                PostDbInitialize();
+                try
+                {
+                    if (settings.ApplicationState == ApplicationStates.PreSetup || settings.ApplicationState == ApplicationStates.SemiSetup)
+                    {
+                        LogManager.Log($"The application is in {settings.ApplicationState} state. database initialization skipped. Invoking setup required event!");
+                        SetupRequired?.Invoke(this, new EventArgs());
+                    }
+                    else
+                    {
+                        PostDbInitialize();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    LogManager.Log(ex, "Application Post Initialization Error!");
+                    ApplicationInitializationError?.Invoke(this, ex);
+                    return;
+                }
             }
         }
 
@@ -273,5 +305,14 @@ namespace Tango.PPC.UI.PPCApplication
                 vm.OnApplicationShuttingDown();
             }
         }
+
+        /// <summary>
+        /// Restarts the application.
+        /// </summary>
+        public void Restart()
+        {
+            Process.Start(Application.ResourceAssembly.Location);
+            Environment.Exit(0);
+        }
     }
 }
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