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How to: Handle Specialized Deployment

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A deployment is an optional operation for projects. A Web project, for example, supports a deployment to let a project update a Web server. Likewise, a Smart Device project supports a deployment to copy a built application to the target device. Project subtypes can supply specialized deployment behavior by implementing the IVsDeployableProjectCfg interface. This interface defines a complete set of the deployment operations:

The actual deployment operation should be performed in the separate thread to make Visual Studio even more responsive to the user interaction. The methods provided by IVsDeployableProjectCfg are called asynchronously by Visual Studio and operate in the background, allowing the environment to query the status of a deployment operation at any time or to stop the operation, if necessary. The IVsDeployableProjectCfg interface deployment operations are called by the environment when the user selects the deploy command.

To notify the environment that a deployment operation has begun or ended, the project subtype needs to call the OnStartDeploy and the OnEndDeploy methods.

Handling Specialized Deployment

To handle a specialized deployment by a subtype project

  • Implement the AdviseDeployStatusCallback method to register the environment to receive notifications of deployment status events.

    Private adviseSink As Microsoft.VisualStudio.Shell.EventSinkCollection = New Microsoft.VisualStudio.Shell.EventSinkCollection()
Public Function AdviseDeployStatusCallback(ByVal pIVsDeployStatusCallback As IVsDeployStatusCallback, _
                                           ByRef pdwCookie As UInteger) As Integer

    If pIVsDeployStatusCallback Is Nothing Then
        Throw New ArgumentNullException("pIVsDeployStatusCallback")
    End If

    pdwCookie = adviseSink.Add(pIVsDeployStatusCallback)
    Return VSConstants.S_OK

End Function

    private Microsoft.VisualStudio.Shell.EventSinkCollection adviseSink = new Microsoft.VisualStudio.Shell.EventSinkCollection();
public int AdviseDeployStatusCallback(IVsDeployStatusCallback pIVsDeployStatusCallback, 
                                      out uint pdwCookie)
{
    if (pIVsDeployStatusCallback == null)
        throw new ArgumentNullException("pIVsDeployStatusCallback");

    pdwCookie = adviseSink.Add(pIVsDeployStatusCallback);
    return VSConstants.S_OK;
}

  • Implement the UnadviseDeployStatusCallback method to cancel the environment's registration to receive notifications of deployment status events.

    Public Function UnadviseDeployStatusCallback(ByVal dwCookie As UInteger) As Integer
    adviseSink.RemoveAt(dwCookie)
    Return VSConstants.S_OK
End Function

    public int UnadviseDeployStatusCallback(uint dwCookie)
{
    adviseSink.RemoveAt(dwCookie);
    return VSConstants.S_OK;
}

  • Implement the Commit method to perform the commit operation specific to your application. This method is used mainly for database deployment.

    Public Function Commit(ByVal dwReserved As UInteger) As Integer
    'Implement commit operation here.
    Return VSConstants.S_OK
End Function

    public int Commit(uint dwReserved)
{
     //Implement commit operation here.
     return VSConstants.S_OK;
}

  • Implement the Rollback method to perform a rollback operation. When this method is called, the deployment project must do whatever is appropriate to rollback changes and restore the state of the project. This method is used mainly for database deployment.

    Public Function Commit(ByVal dwReserved As UInteger) As Integer
    'Implement commit operation here.
    Return VSConstants.S_OK
End Function

    public int Rollback(uint dwReserved)
{
    //Implement Rollback operation here.
    return VSConstants.S_OK;
}

  • Implement the QueryStartDeploy method to determine whether or not a project is able to start a deployment operation.

    Public Function QueryStartDeploy(ByVal dwOptions As UInteger, ByVal pfSupported As Integer(), ByVal pfReady As Integer()) As Integer
    If Not pfSupported Is Nothing AndAlso pfSupported.Length > 0 Then
        pfSupported(0) = 1
    End If
    If Not pfReady Is Nothing AndAlso pfReady.Length > 0 Then
        pfReady(0) = 0
        If Not deploymentThread Is Nothing AndAlso (Not deploymentThread.IsAlive) Then
            pfReady(0) = 1
        End If
    End If
    Return VSConstants.S_OK
End Function

    public int QueryStartDeploy(uint dwOptions, int[] pfSupported, int[] pfReady)
{
    if (pfSupported != null && pfSupported.Length >0)
        pfSupported[0] = 1;
    if (pfReady != null && pfReady.Length >0)
    {
        pfReady[0] = 0;
        if (deploymentThread != null && !deploymentThread.IsAlive)
            pfReady[0] = 1;
    }
    return VSConstants.S_OK;
}

  • Implement the QueryStatusDeploy method to determine whether or not a deployment operation has completed successfully.

    Public Function QueryStatusDeploy(ByRef pfDeployDone As Integer) As Integer
    pfDeployDone = 1
    If Not deploymentThread Is Nothing AndAlso deploymentThread.IsAlive Then
        pfDeployDone = 0
    End If
    Return VSConstants.S_OK
End Function

    public int QueryStatusDeploy(out int pfDeployDone)
{
    pfDeployDone = 1;
    if (deploymentThread != null && deploymentThread.IsAlive)
        pfDeployDone = 0;
    return VSConstants.S_OK;
}

  • Implement the StartDeploy method to begin a deployment operation in a separate thread. Place the code specific to your application's deployment inside the Deploy method.

    Public Function StartDeploy(ByVal pIVsOutputWindowPane As IVsOutputWindowPane, ByVal dwOptions As UInteger) As Integer
    If pIVsOutputWindowPane Is Nothing Then
        Throw New ArgumentNullException("pIVsOutputWindowPane")
    End If

    If Not deploymentThread Is Nothing AndAlso deploymentThread.IsAlive Then
        Throw New NotSupportedException("Cannot start deployment operation when it is already started; Call QueryStartDeploy first")
    End If

    outputWindow = pIVsOutputWindowPane

    ' Notify that deployment is about to begin and see if any user wants to cancel.
    If (Not NotifyStart()) Then
        Return VSConstants.E_ABORT
    End If

    operationCanceled = False

    ' Create and start our thread
    deploymentThread = New Thread(AddressOf Me.Deploy)
    deploymentThread.Name = "Deployment Thread"
    deploymentThread.Start()

    Return VSConstants.S_OK
End Function

    public int StartDeploy(IVsOutputWindowPane pIVsOutputWindowPane, uint dwOptions)
{
    if (pIVsOutputWindowPane == null)
        throw new ArgumentNullException("pIVsOutputWindowPane");

    if (deploymentThread != null && deploymentThread.IsAlive)
        throw new NotSupportedException("Cannot start deployment operation when it is already started; Call QueryStartDeploy first");

    outputWindow = pIVsOutputWindowPane;

    // Notify that deployment is about to begin and see if any user wants to cancel.
    if (!NotifyStart())
        return VSConstants.E_ABORT;

    operationCanceled = false;

    // Create and start our thread
    deploymentThread = new Thread(new ThreadStart(this.Deploy));
    deploymentThread.Name = "Deployment Thread";
    deploymentThread.Start();

    return VSConstants.S_OK;
}

  • Implement the StopDeploy method to stop a deployment operation. This method is called when a user presses the Cancel button during the deployment process.

    Public Function StopDeploy(ByVal fSync As Integer) As Integer
    If Not deploymentThread Is Nothing AndAlso deploymentThread.IsAlive Then
        Return VSConstants.S_OK
    End If

    outputWindow.OutputStringThreadSafe("Canceling deployment")
    operationCanceled = True
    If fSync <> 0 Then
        ' Synchronous request, wait for the thread to terminate.
        If (Not deploymentThread.Join(10000)) Then
            Debug.Fail("Deployment thread did not terminate before the timeout, Aborting thread")
            deploymentThread.Abort()
        End If
    End If

    Return VSConstants.S_OK
End Function

    public int StopDeploy(int fSync)
{
    if (deploymentThread != null && deploymentThread.IsAlive)
        return VSConstants.S_OK;

    outputWindow.OutputStringThreadSafe("Canceling deployment");
    operationCanceled = true;
    if (fSync != 0)
    {
        // Synchronous request, wait for the thread to terminate.
        if (!deploymentThread.Join(10000))
        {
            Debug.Fail("Deployment thread did not terminate before the timeout, Aborting thread");
            deploymentThread.Abort();
        }
    }

    return VSConstants.S_OK;
}

Note

All code examples provided in this topic are parts of a larger example, Visual Studio Extensibility Samples.

See Also

Other Resources

Project Subtypes