[Engine-devel] [Design for 3.2 RFE] Improving proxy selection algorithm for Power Management operations

[Eli Mesika]

----- Original Message -----
> From: "Eli Mesika" <emesika at redhat.com>
> To: "Itamar Heim" <iheim at redhat.com>
> Cc: "engine-devel" <engine-devel at ovirt.org>
> Sent: Friday, November 9, 2012 12:06:05 PM
> Subject: Re: [Engine-devel] [Design for 3.2 RFE] Improving proxy selection algorithm for Power Management operations
> 
> 
> 
> ----- Original Message -----
> > From: "Itamar Heim" <iheim at redhat.com>
> > To: "Eli Mesika" <emesika at redhat.com>
> > Cc: "engine-devel" <engine-devel at ovirt.org>, "Michael Pasternak"
> > <mpastern at redhat.com>, "Simon Grinberg"
> > <sgrinber at redhat.com>, "Dan Kenigsberg" <danken at redhat.com>
> > Sent: Friday, November 9, 2012 12:02:37 PM
> > Subject: Re: [Engine-devel] [Design for 3.2 RFE] Improving proxy
> > selection algorithm for Power Management operations
> > 
> > On 11/09/2012 10:52 AM, Eli Mesika wrote:
> > 
> > >> >
> > >> >  > FenceWrapper
> > >> >
> > >> >i understand danken suggested going this way, rather than than
> > >> >another
> > >> >instance of vdsm.
> > >> >is vdsm only calling these scripts today and all logic is in
> > >> >engine,
> > >> >or
> > >> >does vdsm has any logic in wrapping these scripts (not a
> > >> >blocker
> > >> >to
> > >> >doing FenceWrapper, just worth extracting that logic from vdsm
> > >> >to
> > >> >such a
> > >> >script, then using it in both. i hope answer is 'no logic'...)
> > > vdsm has some logic that maps between the call passed to it from
> > > engine and the actual parameters generated for the script.
> > > AFAIK, this logic only "builds" the correct arguments for the
> > > command according to the agent type
> > >
> > 
> > can we extract it to an external wrapper?
> > I'd hate to fix bugs/changes twice for this.
> 
> I'll check it with danken on SUN

Well, looked at it a bit , the VDSM code is in fenceNote function in API.py
What I think is that we can exclude the fenceNote implementation to a separate fence.py file and call it from the API.py
Then we can use one of the following in Java to call the method from fence.py
1) jython
2) org.python.util.PythonInterpreter

See http://stackoverflow.com/questions/8898765/calling-python-in-java

danken, what do you think ?

> 
> > 
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