我怎样才能让我的TCP监听服务正常终止？

Question

我正在写一个Windows服务，启动TCP监听。核心代码工作正常，但我有几个问题，一个Windows服务的机制。

现在，当我的服务启动时，它会创建一个线程，并在线程启动TCP监听器。然后，当服务停止时，它终止该线程：

Public Class txnSocketService
    Inherits System.ServiceProcess.ServiceBase

    Private listenerThread As Thread


    Public Sub New()
        Me.ServiceName = "txnSocketService"
        Me.CanStop = True
        Me.CanPauseAndContinue = True
        Me.AutoLog = True
    End Sub

    Shared Sub Main()
        System.ServiceProcess.ServiceBase.Run(New txnSocketService)
    End Sub

    Protected Overrides Sub OnStart(ByVal args() As String)
        listenerThread = New Thread(AddressOf pmtListener.Main)
        listenerThread.IsBackground = True
        listenerThread.Start()
    End Sub

    Protected Overrides Sub OnStop()
        listenerThread.Abort()
    End Sub

    Private Sub InitializeComponent()
        '
        'txnSocketService
        '
        Me.ServiceName = "txnSocketService"

    End Sub
End Class

开始了正常工作。如果我停止该服务，但该服务进程不会终止。我在做什么错了？

[顺便说一句，我正在做这在VS2010 Beta 2中，如果该事项。

Answer 1

相反终止与Thread.Abort的线程（）应实现一些正常关闭套接字shutdown（）方法的。

e.g。

Public Class pmtListener
  Protected shutingdown As Boolean = False
  ' [...] '
  Public Sub Shutdown()
    shutingdown = True
    socketListen.Close()
  End Sub
  Sub Main()
    Dim socketAccepted As Socket
    shutingdown = False
    socketListen.Listen(3)
    While Not shutingdown
      Try
        socketAccepted = socketListen.Accept()
        ' do something with socketAccepted '
        socketAccepted.Close()
        socketAccepted = Nothing
      Catch ex As SocketException
        If shutingdown Then
          ' ignoring it '
        End If
      End Try

    End While
  End Sub

当关断（）调用socketListen.Close（）和工作线程当前正在等待一个新的连接的SocketExcpetion将升高。我们就忽略这个问题。结果 在你调用OnStop（）方法，你先给pmtListener实例的机会优雅的关闭，通过调用myListener.Shutdown（）（然后设置shutingdown标志和关闭套接字），然后等待（最多）一段时间内（如1秒）。如果线程还活着尝试终止它。

Public Class txnSocketService
  Inherits System.ServiceProcess.ServiceBase

  Protected myListener as pmtListern
  Protected listenerThread As Thread

  ' [...] '
  Protected Overrides Sub OnStart(ByVal args() As String)
    myListener = new pmtListener
    listenerThread = New Thread(AddressOf myListener.Main)
    listenerThread.IsBackground = True
    listenerThread.Start()
  End Sub

  Protected Overrides Sub OnStop()
    myListener.Shutdown()
    listenerThread.Join(1000) ' give it a second '
    If listenerThread.IsAlive Then
      listenerThread.Abort()
    End If
  End Sub