asterisk users - Aug 2014 - Dispatching calls question

I have a question about dispatching calls...

If I try to dispatch a call on line 1 using the AMI
and I check in my table to see if line 1 is available and it is....
So I have done my checking now I dispatch my call
and at that same time a call comes in on line 1 and now its no longer
available
for me to make a call, I connect on AMI and my call fails....

How do I prevent this from happening? Sure I can start at 23 instead of 1
and work down
instead of up  but eventually the same thing may happen.

I'm using Asterisk 11.11 if that matters.

Thanks,

Jerry
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On Wed, 20 Aug 2014, Jerry Geis wrote:
> I have a question about dispatching calls...
> If I try to dispatch a call on line 1 using the AMI
> and I check in my table to see if line 1 is available and it is....
> So I have done my checking now I dispatch my call?
> and at that same time a call comes in on line 1 and now its no longer
available?
> for me to make a call, I connect on AMI and my call fails....
> 
> How do I prevent this from happening? Sure I can start at 23 instead of 1
and work down
> instead of up ?but eventually the same thing may happen.
If you're using something like MySQL, use 'get_lock/release_lock.'

If you're using some other database, see what locking features you have 
available.

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                              Fax: +1-760-731-3000