IDTSSuspend.SuspendExecution Method

Artikkeli
12/03/2008

Indicates that the executable needs to suspend. This method is called by the runtime engine.

Namespace: Microsoft.SqlServer.Dts.Runtime
Assembly: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

Syntax

'Declaration
Sub SuspendExecution

void SuspendExecution ()

void SuspendExecution ()

void SuspendExecution ()

function SuspendExecution ()

Remarks

This method is not used in code. It it called by the runtime when a breakpoint has been encountered.

However, you will need to provide code for this method, which is inherited from the IDTSSuspend class, if you write a multi-threaded custom task that exposes breakpoints. If your task is single threaded, which means that your implementation of Execute in your custom task does not start new threads, you do not need to implement this interface. For more information on writing custom tasks, see Developing a Custom Task.

Example

The following code example is an example of an overridden SuspendExecution method for a custom task.

public void SuspendExecution() 
{
    lock (this) 
    {
        // If a suspend is required, do it. 
        if (m_suspendRequired != 0) 
           ChangeEvent(m_canExecute, false); 
        } 

        // The application cannot return from Suspend until the task
        // is suspended.
        // This can happen in one of two ways:
        // 1) The m_suspended event occurs, indicating that the 
        // execute thread has suspended, or 
        // 2) the canExecute flag is set, indicating that a suspend is
        // no longer required. 
        WaitHandle [] suspendOperationComplete = {m_suspended, m_canExecute};
        WaitHandle.WaitAny(suspendOperationComplete);
}

Public  Sub SuspendExecution()
    lock (Me)
    {
        If m_suspendRequired <> 0 Then
           ChangeEvent(m_canExecute, False)
        End If
    }
        ' The application cannot return from Suspend until the task
        ' is suspended. This can happen in one of two ways:
        ' 1) The m_suspended event occurs, indicating that the 
        ' execute thread has suspended, or 
        ' 2) the canExecute flag is set, indicating that a suspend is
        ' no longer required. 
        Dim suspendOperationComplete As WaitHandle() = {m_suspended, m_canExecute}
        WaitHandle.WaitAny(suspendOperationComplete)

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Development Platforms

For a list of the supported platforms, see Hardware and Software Requirements for Installing SQL Server 2005.

Target Platforms