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From Koushik Das <koushik....@citrix.com>
Subject RE: [DISCUSS] Hyper-V Plugin & Microsoft Compiler & IP Clearance
Date Tue, 26 Mar 2013 14:07:02 GMT
Think of the external C# component as external to CS. It exposes a REST endpoint and has independent
lifecycle. The server resource running as part of Cloudstack MS will connect to this external
REST endpoint.

> -----Original Message-----
> From: Donal Lafferty [mailto:donal.lafferty@citrix.com]
> Sent: Tuesday, March 26, 2013 6:50 PM
> To: dev@cloudstack.apache.org
> Cc: cloudstack-dev@incubator.apache.org
> Subject: RE: [DISCUSS] Hyper-V Plugin & Microsoft Compiler & IP Clearance
> 
> The terminology for plugins has unfortunate overloading when it comes to
> the term 'ServerResource'.  As a Java class, it seems to be used to in the
> implementation both a plugin's ServerComponent and a plugin's
> ServerResource.  E.g. the KVM plugin has a 'dummy' ServerResource in the
> management server, and a real ServerResource in the remote agent.
> 
> With that in mind, do you mean for the C# component to be accessible over a
> RESTful API from plugin classes loaded into the management server?
> 
> DL
> 
> > -----Original Message-----
> > From: Koushik Das [mailto:koushik.das@citrix.com]
> > Sent: 26 March 2013 12:52 PM
> > To: dev@cloudstack.apache.org
> > Cc: cloudstack-dev@incubator.apache.org
> > Subject: RE: [DISCUSS] Hyper-V Plugin & Microsoft Compiler & IP
> > Clearance
> >
> > Better to write the C# component doing Hyper-V specific stuff as a
> > standalone component and expose a REST API. The ServerResource class
> > is still in java and makes REST calls to the C# component.
> >
> > -Koushik
> >
> > > -----Original Message-----
> > > From: Donal Lafferty [mailto:donal.lafferty@citrix.com]
> > > Sent: Tuesday, March 26, 2013 3:29 PM
> > > To: dev@cloudstack.apache.org
> > > Cc: cloudstack-dev@incubator.apache.org
> > > Subject: RE: [DISCUSS] Hyper-V Plugin & Microsoft Compiler & IP
> > > Clearance
> > >
> > >
> > > > -----Original Message-----
> > > > From: rohityadav89@gmail.com [mailto:rohityadav89@gmail.com] On
> > > Behalf
> > > > Of Rohit Yadav
> > > > Sent: 26 March 2013 4:02 AM
> > > > To: dev@cloudstack.apache.org
> > > > Cc: cloudstack-dev@incubator.apache.org
> > > > Subject: Re: [DISCUSS] Hyper-V Plugin & Microsoft Compiler & IP
> > > > Clearance
> > > >
> > > > On Tue, Mar 26, 2013 at 4:31 AM, Donal Lafferty
> > > > <donal.lafferty@citrix.com>
> > > > wrote:
> > > > > It makes a lot of sense to write the ServerResourse for Hyper-V
> > > > > in C#,
> > > > because there's a lot of frameworks written in the Microsoft
> > > > ecosystem with C# in mind.
> > > > >
> > > > > If that's the case, then it also makes sense to use the
> > > > > Microsoft compiler to
> > > > compile the ServerResource.
> > > >
> > > > This won't get much love, instead of a compiler from the North
> > > > Atlantic giant,
> > > [Donal Lafferty]
> > > Northwest Pacific :)
> > > > if you were to use C# anyway why not consider using mono for your
> > > > compiler/build infrastructure? While I would avoid mono and it
> > > > would be difficult for folks to build/develop, if something could
> > > > be done in C#, could n't it be done in Java, Scala or anything
> > > > that could run on JVM? If this is possible, it will save us from
> > > > nonoss, proprietary
> > > build/runtime dependency.
> > > [Donal Lafferty]
> > > It's a question of what environment is optimal for the ServerResource.
> > > There is a lot more material for writing a server resource in C#
> > > than there is for writing it in Java.
> > >
> > > Moreover, the ServerResource concept of a plugin was introduced to
> > > allow developers a degree of freedom in choosing the environment for
> > > code that controls data centre resource.  Adopting platform-specific
> > > tools seems to flow naturally from this definition.  I guess you
> > > could call this the multi-lingual
> > > plugin:  one where the ServerResource and ServerComponent are not
> > > homogenous.
> > >
> > > What are the barriers to including 'multi-lingual plugins' in CloudStack?
> > >
> > > >
> > > > Cheers.
> > > >
> > > > >
> > > > > I'm unclear how this impacts contributing the code to Apache
> > CloudStack.
> > > > In particular:
> > > > >
> > > > >
> > > > > 1.       Does dependence on the Microsoft compiler mean that the
> > source
> > > > end up in the non-OSS build?
> > > > >
> > > > > 2.       Is the plugin able to participate in the BVT?
> > > > >
> > > > >

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