EDMIAPI: Add InitializeIDB function

Modules.EDMIAPI/DatabaseWithFallback.vb

@@ -10,7 +10,7 @@ Public Class DatabaseWithFallback
     Private ReadOnly _Client As Client
     Private ReadOnly _ClientConfig As ConfigClientConfiguration
     Private ReadOnly _DatabaseECM As MSSQLServer
-    Private ReadOnly _DatabaseIDB As MSSQLServer
+    Private _DatabaseIDB As MSSQLServer
 
     ''' <summary>
     ''' Options for GetDatatable
@@ -57,6 +57,14 @@ Public Class DatabaseWithFallback
         _ClientConfig = Client.TryGetClientConfig()
     End Sub
 
+    ''' <summary>
+    ''' Set the IDB Database class after initializing the class. 
+    ''' It is now your responsibility to make sure to not use any IDB calls before calling this method.
+    ''' </summary>
+    Public Sub InitializeIDB(pDatabaseIDB As MSSQLServer)
+        _DatabaseIDB = pDatabaseIDB
+    End Sub
+
     Public Function GetDatatableECM(pSQL As String, Optional pConnectionId As Integer = 0) As DataTable
         Return GetDatatable(New GetDatatableOptions(pSQL, Constants.DatabaseType.ECM) With {
             .ConnectionId = pConnectionId

Service.EDMIService/Methods/Database/GetScalarValue/GetScalarValueMethod.vb

@@ -17,18 +17,18 @@ Namespace Methods.Database.GetScalarValue
         ''' </summary>
         Public Function Run(pData As GetScalarValueRequest) As GetScalarValueResponse
             Try
-                Dim oDatatable As DataTable = Nothing
+                Dim oResult As Object = Nothing
 
                 Select Case pData.DatabaseType
                     Case DatabaseType.MSSQL
                         If pData.NamedDatabase = DatabaseName.None Then
-                            oDatatable = GetScalarValueByConnectionId(pData.SqlCommand, pData.ConnectionId)
+                            oResult = GetScalarValueByConnectionId(pData.SqlCommand, pData.ConnectionId)
 
                         ElseIf pData.NamedDatabase = DatabaseName.ECM Then
-                            oDatatable = DatabaseECM.GetScalarValue(pData.SqlCommand)
+                            oResult = DatabaseECM.GetScalarValue(pData.SqlCommand)
 
                         ElseIf pData.NamedDatabase = DatabaseName.IDB Then
-                            oDatatable = DatabaseIDB.GetScalarValue(pData.SqlCommand)
+                            oResult = DatabaseIDB.GetScalarValue(pData.SqlCommand)
 
                         Else
                             LogAndThrow($"Unsupported Named Database supplied. SQL Command [{pData.SqlCommand}] was not executed!")
@@ -40,11 +40,12 @@ Namespace Methods.Database.GetScalarValue
 
                 End Select
 
-                If oDatatable Is Nothing Then
-                    LogAndThrow($"SQL Command did not return any results: [{pData.SqlCommand}]!")
-                End If
+                ' Remove this in the future, empty return values for scalar should be allowed
+                'If oResult Is Nothing Then
+                '    LogAndThrow($"SQL Command did not return any results: [{pData.SqlCommand}]!")
+                'End If
 
-                Return New GetScalarValueResponse(oDatatable)
+                Return New GetScalarValueResponse(oResult)
             Catch ex As Exception
                 Logger.Warn("Error occurred while getting database scalar value!")
                 Logger.Error(ex)
@@ -52,7 +53,7 @@ Namespace Methods.Database.GetScalarValue
             End Try
         End Function
 
-        Private Function GetScalarValueByConnectionId(pSQLCommand As String, pConnectionId As Integer) As DataTable
+        Private Function GetScalarValueByConnectionId(pSQLCommand As String, pConnectionId As Integer) As Object
             If pConnectionId = 0 Then
                 Return DatabaseECM.GetScalarValue(pSQLCommand)
             Else