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Classic ASP Examples

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(Classic ASP) Thread Pool Size

Demonstrates how to set the maximum number of threads in Chilkat's thread pool manager. Also demonstrates how to set a thread pool log file for help in diagnosing unexpected problems.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
' All Chilkat classes can be unlocked at once at the beginning of a program
' by calling UnlockBundle.  It requires a Bundle unlock code.
set chilkatGlob = Server.CreateObject("Chilkat_9_5_0.Global")
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( chilkatGlob.LastErrorText) & "</pre>"
    Response.End
End If

' Set the maximum number of threads in the Chilkat thread pool to 12.
' This means that no more than 12 background worker threads will exist simultaneously.
' If more than 12 tasks are queued then some must wait for a worker thread to become free.
' Note: The Chilkat thread pool manager thread is a thread distinct from the
' worker threads.  It starts when the 1st asynchronous task is Run. 
chilkatGlob.MaxThreads = 12

' Also, the ThreadPoolLogPath can be set to cause the thread pool manager thread to
' keep a log file. This is for the purpose of debugging if unexpected problems occur.
chilkatGlob.ThreadPoolLogPath = "/home/users/chilkat/logs/threadPoolLog.txt"

set http1 = Server.CreateObject("Chilkat_9_5_0.Http")
set http2 = Server.CreateObject("Chilkat_9_5_0.Http")
set http3 = Server.CreateObject("Chilkat_9_5_0.Http")

url1 = "http://www.marcusmiller.com/"
url2 = "http://www.tromboneshorty.com/"
url3 = "http://www.jamesmorrison.com/"

' Call the async version of the QuickGetStr 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.
' task1 is a Chilkat_9_5_0.Task
Set task1 = http1.QuickGetStrAsync(url1)
If (http1.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( http1.LastErrorText) & "</pre>"
    Response.End
End If

' task2 is a Chilkat_9_5_0.Task
Set task2 = http2.QuickGetStrAsync(url2)
If (http2.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( http2.LastErrorText) & "</pre>"

    Response.End
End If

' task3 is a Chilkat_9_5_0.Task
Set task3 = http3.QuickGetStrAsync(url3)
If (http3.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( http3.LastErrorText) & "</pre>"

    Response.End
End If

' At this point we have 3 task objects, each loaded with a Chilkat method call.
' Note: At this point no background threads are running.  The thread pool manager
' thread is not started -- it will start when the very first task is Run.

' Schedule each task for running on the thread pool.  This changes each task's state
' from Inert to Live. The thread pool manager thread starts with the 1st task queued.
' If the Global.ThreadPoolLogPath property was set, then
' the log file would be created (or appended) at this point.
success = task1.Run()
' Assuming success for brevity...
success = task2.Run()
success = task3.Run()

' The application is now free to do anything else
' while the HTML at the URL's are being downloaded in background threads.

' In this case, we'll just wait for all three tasks to finish.
' All three tasks are running simultaneously in separate background threads.
' We can wait for each in any order.  If Wait is called and the task has already
' finished (or been canceled), then the Wait method returns immediately.
maxWaitMs = 20000
success = task1.Wait(maxWaitMs)
success = task2.Wait(maxWaitMs)
success = task3.Wait(maxWaitMs)
' Assuming success for brevity...

err = "Task failed or canceled"
html1 = err
html2 = err
html3 = err

' Now get the HTML downloaded in each task:
If ((task1.StatusInt = 7) And (task1.TaskSuccess = 1)) Then
    html1 = task1.GetResultString()
End If

If ((task2.StatusInt = 7) And (task2.TaskSuccess = 1)) Then
    html2 = task2.GetResultString()
End If

If ((task3.StatusInt = 7) And (task3.TaskSuccess = 1)) Then
    html3 = task3.GetResultString()
End If

Response.Write "<pre>" & Server.HTMLEncode( html1) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "----") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( html2) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "----") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( html3) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "----") & "</pre>"


%>
</body>
</html>

 

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