Hi Kirk, Cool. Thanks.
This gave me some good ideas! Randy Engle XC2 Software LLC – XC2LIVE! -----Original Message----- From: 4D_Tech [mailto:[email protected]] On Behalf Of Kirk Brooks via 4D_Tech Sent: Monday, August 14, 2017 8:24 AM To: 4D iNug Technical <[email protected]> Cc: Kirk Brooks <[email protected]> Subject: Re: Get Info from a 4D Client - aka Interclient communication Randy, You could have a background process on 4D server that periodically pings the web server. Or makes an http call to it. I use a service to monitor server status that relies on this approach. This will also raise a flag if the server is un-available for some reason even if it is running. But if 4D server is walled off from the internet I'd use Execute on client and Web is server running <http://doc.4d.com/4Dv15/4D/15.4/WEB-Is-server-running.301-3275028.en.html>. But that requires you to know which client is running it. Maybe there are more than one? Using a table, like you're doing already, isn't such a terrible idea. But you could also do the same thing with variables and avoid the SET VARIABLE issues by using execute on server. Let's say this loop is running in a background process on a client: $webInfo:=JSON Parse("{}") OB SET($webInfo;"machine";Current machine) While(not($done)) OB SET($webInfo;"timestamp";Timestamp) OB SET($webInfo;"running";WEB Is server running) If(WEB Is server running)// optional info ... // IP, # processes, ... End if WEB_update_monitor($webInfo) DELAY PROCESS(Current process;300) End while WEB_update_monitor executes on server : // WEB_update_monitor <>webInfo_obj:=$1 And on the server you have some monitor process running that looks at <>webInfo_obj and acts accordingly. If more than one client might be involved I'd use an object array but the mechanics are the same. On Sun, Aug 13, 2017 at 6:18 PM, Randy Engle via 4D_Tech < [email protected]> wrote: > In this particular case, I've got the web server running on the > client, and I want to know if the web server is in fact running. > > -- Kirk Brooks San Francisco, CA ======================= *The only thing necessary for the triumph of evil is for good men to do nothing.* *- Edmund Burke* ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] ********************************************************************** ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
