 03 Jan 2019, Konstantin Olchanski, Info, note on the midas event buffer code, part 8, writer and reader communications
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> > > > > > In this technical note, I write down the workings of the midas event buffer code
Event buffer readers and writers need to communicate following information:
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10 Jan 2019, Konstantin Olchanski, Info, note on the midas event buffer code, part 8, writer and reader communications
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> > > > > > > In this technical note, I write down the workings of the midas event buffer code
> Event buffer readers and writers need to communicate following information:
>
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 10 Jan 2019, Konstantin Olchanski, Info, removal of cm_watchdog()
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cm_watchdog() has been removed from the latest midas sources. The watchdog functions performed by cm_watchdog() were
moved to cm_yield() - those are - maintaining odb and event buffer "last active" timestamps and checking for and removing of
timed-out clients.
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18 Jan 2019, Konstantin Olchanski, Bug Report, Custom script with new MIDAS
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> I am having difficulty getting the custom scripts to work within the updated MIDAS. Before the
> update I was using something like :
>
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18 Jan 2019, Konstantin Olchanski, Info, bitbucket issue tracker "feature"
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It turns out the bitbucket issue tracker has a feature - I cannot make it automatically add me
to the watcher list of all new issues.
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21 Jan 2019, Konstantin Olchanski, Info, removal of cm_watchdog()
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> cm_watchdog() has been removed from the latest midas sources
> Removal of cm_watchdog() solves many problems in the midas code base:
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24 Jan 2019, Konstantin Olchanski, Info, removal of cm_watchdog()
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> > cm_watchdog() has been removed from the latest midas sources
> > Removal of cm_watchdog() solves many problems in the midas code base:
> Removal of cm_watchdog() creates new problems:
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24 Jan 2019, Konstantin Olchanski, Suggestion, json rpc API for history data
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> For us it would be a handy feature if history data could be requested directly
> from a custom page (time range or run based intervals) . Here I am not talking
> about history plots but I am talking about recorded time series data. This way
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24 Jan 2019, Konstantin Olchanski, Bug Report, Custom script with new MIDAS
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> <input type=submit name=customscript value="test">
Stefan is right, input-type-submit has to be inside a form. This type of rpc call is "old school". Today, we should
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11 Feb 2019, Konstantin Olchanski, Info, json-rpc request for ODB /Script and /CustomScript.
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I added json-rpc requests for ODB /Script and /CustomScript (the first one shows up on the status page in the left hand side menu, the
second one is "hidden", intended for use by custom pages).
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20 Feb 2019, Konstantin Olchanski, Info, odb needs protection against ctrl-c
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Even with the cm_watchdog signal removed, some trouble from UNIX signals remains.
This time, when one presses Ctrl-C at the wrong time, the Ctrl-C signal handler will run at the wrong time
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20 Feb 2019, Konstantin Olchanski, Info, odb needs protection against ctrl-c
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Commit f81ff3c protects db_lock/unlock, but not any of the other functions. What if we do ctrl-c in the middle
of some odb write operation in the middle of memory allocation, etc.
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20 Feb 2019, Konstantin Olchanski, Info, odb needs protection against ctrl-c
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> Not sure if you realized, but there is a two-stage Ctrl-C handling inside midas.
Hmm... I am looking at the ctrl-c handler inside odbedit.
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27 Feb 2019, Konstantin Olchanski, Info, mhttpd magic urls
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Here is the list of mhttpd magic URLs.
http "get" path:
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28 Feb 2019, Konstantin Olchanski, Info, resource file search path, mhttpd magic urls
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> url contains midas.js -> send_resource("midas.js")
mhttpd looks for resource files in these directories in this order:
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01 Mar 2019, Konstantin Olchanski, Info, Gyrations of custom pages and ODB /Custom/Path
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Before the days of javascript and ajax and web 2.0, MIDAS introduced "custom pages" for
building graphical display that could show "live" data from MIDAS and that could
have buttons and controls to operate slow controls equipment, etc.
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04 Mar 2019, Konstantin Olchanski, Info, Gyrations of custom pages and ODB /Custom/Path
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Hi, guys, as I was exploring the code and the commit history on Thursday (git rules!) and
as I worked on getting the old custom files to work with Suzannah on Friday, I think
I know how I want this code to work. I think there is no need to break with the old
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04 Mar 2019, Konstantin Olchanski, Forum, Best MIDAS branch/version for "production"
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Hi, Giorgio - you are asking excellent questions. I will try to answer them, but as ever, there are no
easy answers.
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05 Mar 2019, Konstantin Olchanski, Forum, Best MIDAS branch/version for "production"
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>
> PS other than the code peculiar to our experiment, I have made a little modification to the MIDAS install
> Makefile (I noticed that there is an "install" target but not an "uninstall" target so I wrote it).
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05 Mar 2019, Konstantin Olchanski, Info, Gyrations of custom pages and ODB /Custom/Path
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> > - mhttpd cannot serve /etc/passwd by default as "/" is forbidden in file names added to /Custom/Path.
> You do this with a simple
> if (custom_path == "/")
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