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ID Date Icon Author Author Email Category OS ELOG Version Subject
  68231   Wed Jan 13 19:08:09 2016 Reply Stefan Rittstefan.ritt@psi.chQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

In the documentation of course :-)

Tamas Gal wrote:

Where is this feature documented?

Stefan Ritt wrote:

You guys know that there is the possibility to execute an arbitrary script on each submission of a new messge? Just use "Execute new = <script>". In the script you have access to all parameters of the message. That's maybe simple than to watch the file set.

 

 

  68230   Wed Jan 13 18:37:32 2016 Reply Tamas Galtgal@km3net.deQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

Where is this feature documented?

Stefan Ritt wrote:

You guys know that there is the possibility to execute an arbitrary script on each submission of a new messge? Just use "Execute new = <script>". In the script you have access to all parameters of the message. That's maybe simple than to watch the file set.

 

  68229   Wed Jan 13 17:21:56 2016 Reply Stefan Rittstefan.ritt@psi.chQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

You guys know that there is the possibility to execute an arbitrary script on each submission of a new messge? Just use "Execute new = <script>". In the script you have access to all parameters of the message. That's maybe simple than to watch the file set.

Tamas Gal wrote:

I just noticed that there are multiple messages per file, so I have to adapt the parser. I'll update this thread when I'm done!

Johan Forsberg wrote:

Yeah, I suppose something like that would be both faster and more efficient than polling ELOG itself. Fortunately the ELOG disk format looks easily parsed.

Thanks for the pointer!

Tamas Gal wrote:

I recommend monitoring directly on the server. Here is an example of a very simply Python script (https://github.com/tamasgal/elog-slack) which monitors the files very efficiently and immediately pushes notifications to Slack (slack.com). Just look at the code, it's pretty straight forward and very easy to adapt it to other (web) services.

Btw. here is an ELOG entry of it https://midas.psi.ch/elogs/Forum/68224

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

 

 

 

 

  68228   Wed Jan 13 17:04:34 2016 Reply Tamas Galtgal@km3net.deQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

I just noticed that there are multiple messages per file, so I have to adapt the parser. I'll update this thread when I'm done!

Johan Forsberg wrote:

Yeah, I suppose something like that would be both faster and more efficient than polling ELOG itself. Fortunately the ELOG disk format looks easily parsed.

Thanks for the pointer!

Tamas Gal wrote:

I recommend monitoring directly on the server. Here is an example of a very simply Python script (https://github.com/tamasgal/elog-slack) which monitors the files very efficiently and immediately pushes notifications to Slack (slack.com). Just look at the code, it's pretty straight forward and very easy to adapt it to other (web) services.

Btw. here is an ELOG entry of it https://midas.psi.ch/elogs/Forum/68224

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

 

 

 

  68227   Wed Jan 13 10:29:54 2016 Reply Johan Forsbergjohan.forsberg@maxlab.lu.seQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

Yeah, I suppose something like that would be both faster and more efficient than polling ELOG itself. Fortunately the ELOG disk format looks easily parsed.

Thanks for the pointer!

Tamas Gal wrote:

I recommend monitoring directly on the server. Here is an example of a very simply Python script (https://github.com/tamasgal/elog-slack) which monitors the files very efficiently and immediately pushes notifications to Slack (slack.com). Just look at the code, it's pretty straight forward and very easy to adapt it to other (web) services.

Btw. here is an ELOG entry of it https://midas.psi.ch/elogs/Forum/68224

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

 

 

  68226   Wed Jan 13 10:27:21 2016 Reply Johan Forsbergjohan.forsberg@maxlab.lu.seQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

Yeah, I found the RSS feed feature, but I could not get ETags/Last-Modified header fields which meant that I'd have to read and parse the entire feed every time. Maybe I made a mistake and they do work, but if not, I think it would make sense to implement as it should save work for both the server and the client.

 

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

 

  68225   Wed Jan 13 08:37:42 2016 Reply Tamas Galtgal@km3net.deQuestionLinuxELOG V3.1.0-241Re: Monitoring a logbook for changes

I recommend monitoring directly on the server. Here is an example of a very simply Python script (https://github.com/tamasgal/elog-slack) which monitors the files very efficiently and immediately pushes notifications to Slack (slack.com). Just look at the code, it's pretty straight forward and very easy to adapt it to other (web) services.

Btw. here is an ELOG entry of it https://midas.psi.ch/elogs/Forum/68224

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

 

  68224   Wed Jan 13 08:25:50 2016 Idea Tamas Galtgal@km3net.deInfoLinuxELOG V2.9.2-245Slackbot for ELOG

Dear all,

I just wanted to share a small script which I wrote to integrate our ELOG in Slack. This allows us to be notified immediately if there is a new logbook entry directly within the appropriate Slack channels. We're using ELOG V2.9.2-245 but if the log-file format has "Subject, Author, Type" in the header, it should work with any other version. I'm using Pyinotify for the file watch which relies on a Linux Kernel feature (merged in kernel 2.6.13) called inotify, so the script only works on Linux.

Here is the code: https://github.com/tamasgal/elog-slack

Cheers and thanks for ELOG!

Tom

ELOG V3.1.5-3fb85fa6