Re: [CFCDev] Threading question

[Matt Liotta]

It's not every day you see VB on a CFML mailing list. Anyway, the best 
way to go is to use the Java thread sleep method. There is a difference 
between blocking the thread using Java vs. COM. Specifically, you will 
block more than one thread with COM.

-Matt

On Jan 13, 2004, at 6:42 PM, Roland Collins wrote:

Hey guys,

I'm writing a function that waits for a short time for a file to appear
before timing out.  The basic idea is
function WaitForFile(somefile, timeout)
        starttime = now()
        bFileExists = FileExists(somefile)
        loop while not bFileExists and (now - startime) < timeout
                Sleep(1000)
                bFileExists = FileExists(somefile)
        end loop
        return bFileExists
end function
Since CF doesn't have a Sleep function, I'm stuck with workarounds.  I 
can
do it either by accessing the java.lang.Thread classes (much thanks to
Christian's Blog at 
http://www.markme.com/cantrell/archives/002801.cfm), or
by writing a COM object that does effectively the same thing.  The 
question
is: does blocking the currently executing CF thread using the java 
Sleep()
method differ from blocking it using a synchronous COM method ?  In 
other
words, does anyone know of any internal CF quirks that would make it 
less
safe to use the java method vs the COM method?  Future-proofing is not 
a
concern at this point, though I'd wager support for the java base 
classes
isn't being removed from CF any time soon ;)

<CFSCRIPT>
        thrd = CreateObject("java", "java.lang.Thread");
        thrd.Sleep(javaCast("long", 10000));
</CFSCRIPT>
TIA,
RC Collins
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