I am using Session Data Management Tool created by Xiangyang Liu to store data between different threads in ASP.NET asyncronous application.
The source code of the tool has SessionService web site where configuration is done in global.asax.
To make it easier to incorporate it into existing ASP.Net web application, it was moved to a separate class. The changes also were done to store trace and data folders in Temp directory, which is easier for deployment.
Option Strict On
Option Explicit On
Imports Microsoft.VisualBasic.ControlChars
Imports System.Threading
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.IO
Imports Tools.TraceUtility
Imports System.Configuration 'mnf 21/9/2005
'Imports System.Web 'mnf 21/9/2005 Added reference
Public Class SessionManagerStartEnd
'Ideally it will be good to pass HttpSessionState.Timeout to make it the same as SessionManager.Timeout
'However HttpSessionState.Timeout is known on Session_Start, not Application_Start event
'TODO extract HttpSessionState.Timeout from Web,config in Application_Start
Public Shared Sub ApplicationStart(ByVal VirtDir As String) 'ByVal SessionTimeout As Integer) 'ByVal Server As HttpServerUtility)
Dim sRootFolder As String '= Server.MapPath(".") + "\..\"
Dim sTraceFilePrefix As String = ConfigurationSettings.AppSettings.Get("TraceFilePrefix")
If sTraceFilePrefix Is Nothing OrElse sTraceFilePrefix = "" Then
sTraceFilePrefix = "Log\SessionService"
End If
If sTraceFilePrefix.IndexOf(":") < 1 Then
sTraceFilePrefix = GetPathInTempFolder(VirtDir, sTraceFilePrefix) 'sRootFolder + sTraceFilePrefix
End If
SetTraceFilePrefix(sTraceFilePrefix)
Dim sTraceLevel As String = ConfigurationSettings.AppSettings.Get("TraceLevel")
If sTraceLevel Is Nothing OrElse sTraceLevel = "" Then
sTraceLevel = "40"
End If
SetTraceLevel(CInt(sTraceLevel))
Dim sTraceCleanup As String = ConfigurationSettings.AppSettings.Get("TraceCleanup")
If sTraceCleanup Is Nothing OrElse sTraceCleanup = "" Then
sTraceCleanup = "7"
End If
SetCleanupSchedule(CInt(sTraceCleanup))
WriteTrace(30, "SessionService started")
Dim mgr As SessionManager = New SessionManager
Dim sFilePath As String = ConfigurationSettings.AppSettings.Get("SessionDataFile")
If sFilePath Is Nothing OrElse sFilePath = "" Then
sFilePath = "Data\SessionDataFile"
End If
If sFilePath.IndexOf(":") < 1 Then
sFilePath = GetPathInTempFolder(VirtDir, sFilePath) ' sRootFolder + sFilePath
End If
mgr.SetSessionDataFile(sFilePath)
Dim sTimeout As String = ConfigurationSettings.AppSettings.Get("Timeout")
If Not sTimeout Is Nothing AndAlso sTimeout <> "" Then
mgr.SetTimeout(CInt(sTimeout))
End If
'If SessionTimeout > 0 Then
' mgr.SetTimeout(SessionTimeout)
'End If
mgr.OnStart()
End Sub
Public Shared Function GetPathInTempFolder(ByVal VirtDir As String, ByVal RelativeFolderName As String) As String
Dim sTempFolderName As String = Path.GetTempPath() ' Environment.GetEnvironmentVariable("TEMP")
sTempFolderName = Path.Combine(sTempFolderName, VirtDir & "\SessionTools\")
Dim pathTarget As String = Path.Combine(sTempFolderName, RelativeFolderName)
Dim sTargetDir As String = Path.GetDirectoryName(pathTarget)
If (Not Directory.Exists(sTargetDir)) Then
Directory.CreateDirectory(sTargetDir)
End If
Return pathTarget
End Function
Public Shared Sub ApplicationEnd()
Dim mgr As SessionLib.SessionManager = New SessionLib.SessionManager
mgr.OnStop()
WriteTrace(30, "SessionService ended")
End Sub
End Class