Re: FTPAPI question

[Christian <chrisv5@xxxxxx>]

Sender: Christian <chrisv5@xxxxxx>

Scott Klement wrote:
> Sender: Scott Klement <sk@xxxxxxxxxxxxxxxx>

> Another situation is where people will "poll" for files on FTP servers. 
> They'll have an RPG program that's using FTPAPI to connect to FTP 
> servers on each of their branch offices. The RPG program then cycles 
> through the different connections, doing an FTP_list() on each 
> connection to see if there's any files to download.  Since it calls 
> FTP_list() every second or so for each office, timeouts aren't usually a 
> problem.

Ahh... that makes perfect sense to me!

> All of the FTP clients that I've seen that have any sort of "timeout" 
> controls merely send a SITE command to the server with the new timeout 
> value.  Is this what you're referring to?  If so, it can be easily done 
> with FTPAPI using FTP_quote().

Well, not really... while you are downloading a large file over a slow 
connection, you are stuck and cannot do anything (well, I guess that is 
where the callbacks come in?). I never looked into the callback stuff, 
but that might just work!

> There's no need for making them threadsafe.  RPG is not a threadsafe 
> language.  The compiler generates code (that the programmer has no 
> control over) that's not threadsafe. The only way RPG it can safely be 
> used in a multi-threaded environment is to have THREAD(*SERIALIZE) on 
> the H-spec, and since this causes it to be serialized, you'll never have 
> multiple threads running at once in an RPG program.

Thanks for the insight. I'll leave it just as it is then.

Regards,
Christian
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