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icon3.gif   Monitoring a logbook for changes, posted by Johan Forsberg on Tue Jan 12 15:06:42 2016 
    icon2.gif   Re: Monitoring a logbook for changes, posted by Stefan Ritt on Tue Jan 12 16:10:34 2016 
    icon2.gif   Re: Monitoring a logbook for changes, posted by Tamas Gal on Wed Jan 13 08:37:42 2016 
       icon2.gif   Re: Monitoring a logbook for changes, posted by Johan Forsberg on Wed Jan 13 10:29:54 2016 
          icon2.gif   Re: Monitoring a logbook for changes, posted by Tamas Gal on Wed Jan 13 17:04:34 2016 
             icon2.gif   Re: Monitoring a logbook for changes, posted by Stefan Ritt on Wed Jan 13 17:21:56 2016 
                icon2.gif   Re: Monitoring a logbook for changes, posted by Tamas Gal on Wed Jan 13 18:37:32 2016 
                   icon2.gif   Re: Monitoring a logbook for changes, posted by Stefan Ritt on Wed Jan 13 19:08:09 2016 
                      icon2.gif   Re: Monitoring a logbook for changes, posted by Tamas Gal on Wed Jan 13 19:13:47 2016 
                         icon2.gif   Re: Monitoring a logbook for changes, posted by Stefan Ritt on Wed Jan 13 19:22:35 2016 
                            icon2.gif   Re: Monitoring a logbook for changes, posted by Tamas Gal on Wed Jan 13 19:26:35 2016 
                icon2.gif   Re: Monitoring a logbook for changes, posted by Johan Forsberg on Wed Jan 13 20:08:04 2016 
    icon2.gif   Re: Monitoring a logbook for changes, posted by Johan Forsberg on Wed Jan 13 10:27:21 2016 
Message ID: 68218     Entry time: Tue Jan 12 16:10:34 2016     In reply to: 68217
Icon: Reply  Author: Stefan Ritt  Author Email: stefan.ritt@psi.ch 
Category: Question  OS: Linux  ELOG Version: ELOG V3.1.0-241 
Subject: Re: Monitoring a logbook for changes 

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Stefan

Johan Forsberg wrote:

Hi again!

I've another need that you probably already thought of :)

I'd like to be able to efficiently monitor a logbook for changes (new or edited posts) somehow. The most reasonable way I've found so far is to periodically poll a search that looks for posts after the time of the last poll. But that might note be very efficient, especially if the polling period gets short (or number of clients grows).

Is there some other feature that could be used for this? I was thinking maybe the ETag or Last-Modified HTTP header field could be used to show changes to a logbook by just reading the headers, but it would also require HEAD request support which does not seem to be there.

Cheers,

Johan

 

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