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<== Date ==> <== Thread ==>
Subject: RE: EpicsQT and Archiver Appliance
From: "Abdalla Ahmad" <[email protected]>
To: Michael Davidsaver <[email protected]>, "[email protected]" <[email protected]>
Date: Wed, 26 Apr 2017 10:50:42 +0000 
Dear Michael

Can you please elaborate more on installing the proxy you wrote? I'm having difficulties running it on Scientific Linux 7 machine.

First I have the requirements (numpy, twisted and protocol-buffer), then I did:

python setup.py build
sudo python setup.py install

After that I ran the command as in the README:

twistd -n a2aproxy -P 8888 AA-SERVER-URL:17665

And then I get "Wrong number of arguments". 

Running "twistd a2aproxy" gives an error like "No module named EPICSEvent_pb2". Also when reordering the arguments it does not recognize the "-n" option.

Best Regards,

Abdalla Ahmad
Control Engineer
SESAME
Allan, Jordan.
Tel: (+962-5) 3511348 , ext. 265
Fax: (+962-5) 3511423
Mob: (+962-7)88183296
www.sesame.org.jo


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Michael Davidsaver
Sent: Friday, July 15, 2016 6:52 PM
To: [email protected]
Subject: Re: EpicsQT and Archiver Appliance

> Does  Archiver Appliance mimic the XML-RPC for or can it with some 
> additional XML Doc Type added to it?

AA itself does not.  However, I wrote a sort of proxy to do this.  This lets xml-rpc clients transparently access AA.

https://github.com/epicsdeb/carchivetools/blob/master/README-a2aproxy.md

> If not, then I would have to modify EpicsQT's QEArchiveInterface or 
> QEArchiveManager classes to read the AA (JSON?) URL.

AA can provide data either as json or it's native binary format (google protocol buffers).  JSON should be quite easy to prototype.  I went with proto bufs for speed.

https://github.com/epicsdeb/carchivetools/blob/master/carchive/backend/appl.py#L225


On 07/14/2016 06:47 AM, [email protected] wrote:
> Hello,
> 
>  
> 
> This is a question about how to get the EpicsQt's striptool archive to 
> read from Archiver Appliance instead of Channel Archiver. As I 
> understand it Channel Archiver used the XML-RPC protocol to retrieve 
> data via the server for clients but Channel Archiver is now deprecated.
> Does  Archiver Appliance mimic the XML-RPC for or can it with some 
> additional XML Doc Type added to it?
> 
>  
> 
> If not, then I would have to modify EpicsQT's QEArchiveInterface or 
> QEArchiveManager classes to read the AA (JSON?) URL. I have a version 
> of AA running taking data and a version of EpicsQt striptool. I'm just 
> wondering the best way to connect the two and if anyone has tried it.
> 
>  
> 
> Regards,
> 
>  
> 
> Rory
>
Replies:
Re: EpicsQT and Archiver Appliance Michael Davidsaver
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