[Ovirt-devel] Managed Node qpid Modeling

[Daniel P. Berrange]

On Thu, Jul 10, 2008 at 05:51:09AM -0400, Daniel Veillard wrote:
> On Thu, Jul 10, 2008 at 10:18:56AM +0100, Daniel P. Berrange wrote:
> > On Wed, Jul 09, 2008 at 09:55:44PM -0700, Ian Main wrote:
> > > So please take a look and feel free to post questions or comments.
> > > 
> > >     <method name="create_domain" desc="Start a new domain">
> > >       <arg name="description" dir="I" type="sstr" desc="Domain description"/>
> > >       <arg name="vcpus" dir="I" type="unit32" desc="Number of virtual CPUs"/>
> > >       <arg name="max_memory" dir="I" type="unit32" desc="Maximum memory allocated in KB"/>
> > >       <arg name="current_memory" dir="I" type="unit32" desc="Memory to use in KB"/>
> > >       <arg name="boot_device" dir="I" type="sstr" desc="Boot device"/>
> > > 
> > >       <arg name="domain" dir="O" type="sstr" desc="Newly created domain object"/>
> > >       <arg name="result" dir="O" type="ObjID" desc="Description of result.  'success' or 'failure: error msg'"/>
> > >     </method>
> > 
> > This is a seriously bad direction to take. libvirt explicitly uses XML for
> > passing domain creation information so that it is extendable without having
> > to constantly change the API of the creation methods. IMHO any wire protocol
> > between managed nodes and WUI should map pretty much 1-to-1 onto the libvirt
> > APIs. 
> 
>   Agree. And even if AMQP is usually used to transport SOAP payload, I don't
> think you have to a priori restrict yourself to that format.

The wire format isn't actually XML in AMQP world - only the description of
the wire format is XML.  AMQP uses this XML description of APIs to serialize
the data into the wire in a binary format.

Daniel
-- 
|: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|