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(SQL Server) Async Progress Info Log

Demonstrates checking for progress info updates when running a task asynchronously.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

// Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
//
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    -- All Chilkat classes can be unlocked at once at the beginning of a program
    -- by calling UnlockBundle.  It requires a Bundle unlock code.
    DECLARE @chilkatGlob int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Global', @chilkatGlob OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int
    EXEC sp_OAMethod @chilkatGlob, 'UnlockBundle', @success OUT, 'Anything for 30-day trial.'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @chilkatGlob, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @chilkatGlob
        RETURN
      END

    -- The mailman object is used for sending and receiving email.
    DECLARE @mailman int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.MailMan', @mailman OUT

    -- Set the SMTP server and any required settings.
    EXEC sp_OASetProperty @mailman, 'SmtpHost', 'smtp.mymailserver.com'
    EXEC sp_OASetProperty @mailman, 'SmtpUsername', 'myLogin'
    EXEC sp_OASetProperty @mailman, 'SmtpPassword', 'myPassword'
    EXEC sp_OASetProperty @mailman, 'StartTLS', 1

    -- Create a new email object
    DECLARE @email int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Email', @email OUT

    EXEC sp_OASetProperty @email, 'Subject', 'This is a test'
    EXEC sp_OASetProperty @email, 'Body', 'This is a test'
    EXEC sp_OASetProperty @email, 'From', 'Chilkat Support <support@chilkatsoft.com>'
    EXEC sp_OAMethod @email, 'AddTo', @success OUT, 'Chilkat Admin', 'admin@chilkatsoft.com'

    -- Call the async version of the SendEmail method to return a task object.
    -- The task object is loaded, but is in the Inert state -- meaning it is
    -- not yet scheduled to run on Chilkat's background thread pool.
    DECLARE @task int
    EXEC sp_OAMethod @mailman, 'SendEmailAsync', @task OUT, @email
    EXEC sp_OAGetProperty @mailman, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 = 0
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @chilkatGlob
        EXEC @hr = sp_OADestroy @mailman
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    -- Before starting the task, tell it to keep an in-memory log of what would've been
    -- ProgressInfo event callbacks.
    EXEC sp_OASetProperty @task, 'KeepProgressLog', 1

    -- Schedule the task for running on the thread pool.  This changes the task's state
    -- from Inert to Live.
    EXEC sp_OAMethod @task, 'Run', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @task, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @task

        EXEC @hr = sp_OADestroy @chilkatGlob
        EXEC @hr = sp_OADestroy @mailman
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    -- The application is now free to do anything else
    -- while the email is being sent.

    -- For this example, we'll simply sleep and periodically
    -- check to see if the SendEmail if finished.  While checking
    -- however, we'll report on the progress.
    DECLARE @curPctDone int
    SELECT @curPctDone = 0
    DECLARE @name nvarchar(4000)

    DECLARE @value nvarchar(4000)

    EXEC sp_OAGetProperty @task, 'Finished', @iTmp0 OUT
    WHILE @iTmp0 <> 1
      BEGIN

        EXEC sp_OAGetProperty @task, 'PercentDone', @iTmp0 OUT
        IF @iTmp0 <> @curPctDone
          BEGIN
            EXEC sp_OAGetProperty @task, 'PercentDone', @curPctDone OUT

            PRINT @curPctDone + ' percent done'
          END

        -- Check the progress info log.
        -- Emit any log entries..
        EXEC sp_OAGetProperty @task, 'ProgressLogSize', @iTmp0 OUT
        WHILE (@iTmp0 > 0)
          BEGIN
            -- Get the 1st entry, emit it, and then remove it..
            EXEC sp_OAMethod @task, 'ProgressInfoName', @name OUT, 0
            EXEC sp_OAMethod @task, 'ProgressInfoValue', @value OUT, 0


            PRINT @name + ': ' + @value
            EXEC sp_OAMethod @task, 'RemoveProgressInfo', NULL, 0
          END

        -- Sleep 100 ms.
        EXEC sp_OAMethod @task, 'SleepMs', NULL, 100

      END

    -- Just in case there are any remaining entries...
    EXEC sp_OAGetProperty @task, 'ProgressLogSize', @iTmp0 OUT
    WHILE (@iTmp0 > 0)
      BEGIN
        -- Get the 1st entry, emit it, and then remove it..
        EXEC sp_OAMethod @task, 'ProgressInfoName', @name OUT, 0
        EXEC sp_OAMethod @task, 'ProgressInfoValue', @value OUT, 0


        PRINT @name + ': ' + @value
        EXEC sp_OAMethod @task, 'RemoveProgressInfo', NULL, 0
      END

    -- A finished task could be one that was canceled, aborted, or truly finished.  

    -- If the task was "canceled", it was canceled prior to actually starting.  This could
    -- happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
    -- background thread pool scheduler.  

    -- If the task was "aborted", it indicates that it was canceled while running in a background thread.  
    -- The ResultErrorText will likely indicate that the task was aborted.

    -- If the task "completed", then it ran to completion, but the actual success/failure of the method
    -- is determined by the result obtained via a GetResult* method.  (A "completed" task will
    -- have a StatusInt equal to 7.   If the task finished, but was not completed, then it must've
    -- been aborted or canceled:
    EXEC sp_OAGetProperty @task, 'StatusInt', @iTmp0 OUT
    IF @iTmp0 <> 7
      BEGIN

        PRINT 'Task did not complete.'

        EXEC sp_OAGetProperty @task, 'Status', @sTmp0 OUT
        PRINT 'task status: ' + @sTmp0
        EXEC @hr = sp_OADestroy @task

        EXEC @hr = sp_OADestroy @chilkatGlob
        EXEC @hr = sp_OADestroy @mailman
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    -- The SendEmail method returns a boolean.  Therefore, after the task is finished,
    -- we can get the boolean result by calling GetResultBool.  This is the return value had
    -- we called SendEmail synchronously.
    EXEC sp_OAMethod @task, 'GetResultBool', @success OUT
    IF @success <> 1
      BEGIN
        -- The task's ResultErrorText contains what would have been in the LastErrorText property had
        -- the SendEmail method been called synchronously.
        EXEC sp_OAGetProperty @task, 'ResultErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END
    ELSE
      BEGIN

        PRINT 'Email sent asynchronously.'
      END

    EXEC @hr = sp_OADestroy @task

    EXEC sp_OAMethod @mailman, 'CloseSmtpConnection', @success OUT
    IF @success <> 1
      BEGIN

        PRINT 'Connection to SMTP server not closed cleanly.'

      END

    EXEC @hr = sp_OADestroy @chilkatGlob
    EXEC @hr = sp_OADestroy @mailman
    EXEC @hr = sp_OADestroy @email


END
GO

 

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