[ovirt-users] [Engine-devel] ui plugin problems, cannot read from a file.

[Vojtech Szocs]

Hi guys,

> hey, am trying to display the contents of a text file in a java
> applet as a ui plugin in ovirt.

> The same applet performs successfully when run as a standalone, but
> fails to deliver when the it is run through ovirt.

UI plugins are written in JavaScript and HTML. UI plugin is technically
standalone web application sandboxed within invisible <iframe> element
under WebAdmin's DOM. UI plugin uses API to extend existing WebAdmin
functionality through custom UI components (main tab, dialog, etc).

Java applet technology cannot be used to implement UI plugin because
plugin vs. WebAdmin integration happens on JavaScript/HTML level.

I suggest to check out samples-uiplugins git repo for examples:

  http://www.ovirt.org/Features/UIPlugins#Sample_UI_plugins

If you really want to write UI plugin in Java language, you can use
GWT (as suggested by Greg) which yields JavaScript/HTML output.

In general, any technology/language that ultimately yields JavaScript
code can be used to implement UI plugin.

> isn't one of the points of a uiplugin it doesn't have to be GWT based
> (as its not going to be part of the codebase)?

In fact, UI plugins can be written in GWT, if desired. However, as
you mentioned, plugins are decoupled from WebAdmin code base through
the plugin infra/subsystem.

Regards,
Vojtech


----- Original Message -----
> From: "Greg Sheremeta" <gshereme at redhat.com>
> To: "Itamar Heim" <iheim at redhat.com>
> Cc: engine-devel at ovirt.org, "aditya mamidwar" <aditya.mamidwar at gmail.com>, users at ovirt.org
> Sent: Monday, March 31, 2014 2:44:40 PM
> Subject: Re: [Engine-devel] ui plugin problems, cannot read from a file.
> 
> 
> 
> ----- Original Message -----
> > From: "Itamar Heim" <iheim at redhat.com>
> > To: "Greg Sheremeta" <gshereme at redhat.com>, "aditya mamidwar"
> > <aditya.mamidwar at gmail.com>
> > Cc: engine-devel at ovirt.org, users at ovirt.org
> > Sent: Monday, March 31, 2014 12:58:33 AM
> > Subject: Re: [Engine-devel] ui plugin problems, cannot read from a file.
> > 
> > On 03/30/2014 06:33 PM, Greg Sheremeta wrote:
> > > I don't have any ideas. But:
> > >
> > > You really should use GWT to do this instead of an applet. I can't speak
> > > for everyone, and I'm not a maintainer, but I would not accept an applet
> > > into the ovirt-engine source code. It adds a very unnecessary dependency
> > > for the user (to have Java installed in the browser).
> > >
> > 
> > isn't one of the points of a uiplugin it doesn't have to be GWT based
> > (as its not going to be part of the codebase)?
> > 
> Ah, yes, of course :)
> So please disregard my comment.
> /me and his bruised ego steps away from engine-devel
> 
> Greg
> 
> > > Greg
> > >
> > >
> > > ------------------------------------------------------------------------
> > >
> > >     *From: *"aditya mamidwar" <aditya.mamidwar at gmail.com>
> > >     *To: *users at ovirt.org, engine-devel at ovirt.org, awels at redhat.com,
> > >     "Einav Cohen" <ecohen at redhat.com>, "Greg Sheremeta"
> > >     <gshereme at redhat.com>
> > >     *Sent: *Sunday, March 30, 2014 8:14:41 AM
> > >     *Subject: *ui plugin problems, cannot read from a file.
> > >
> > >
> > >
> > >     hey, am trying to display the contents of a text file in a java
> > >     applet as a ui plugin in ovirt.
> > >
> > >     The same applet performs successfully when run as a standalone, but
> > >     fails to deliver when the it is run through ovirt.
> > >
> > >     any plausible explanation?
> > >     PFA the screenshot of both cases
> > >
> > >     --
> > >     -Aditya Mamidwar
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Engine-devel mailing list
> > > Engine-devel at ovirt.org
> > > http://lists.ovirt.org/mailman/listinfo/engine-devel
> > >
> > 
> > 
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