[Engine-devel] Dynamic resource loading in GWT

[Roy Golan]

On 08/07/2013 02:08 PM, Einav Cohen wrote:
> Hi Roy,
>
> a couple of notes (I could be totally wrong here, GWT experts - please review/comment):
>
> - from [1]:
> "Provides dynamic string lookup of key/value string pairs defined in a module's host HTML page" -
> there is a chance that a gwt dictionary is limited to reading key/value string pairs that reside
> within the *gwt module host HTML page* (i.e., within the context of the GWT application -
> "http://[server]/webadmin/webadmin/...") and not outside - need to find that out.
well the file servlet resides on [server] so I don't think there a "same 
origin policy" problem here - correct me if I'm wrong (isn't branding 
doing something similar?)
>
> - again, from [1]:
> "a variety of error conditions (particularly those involving key mismatches) cannot be caught until
> runtime. Similarly, the GWT compiler is unable discard unused dictionary values since the structure
> cannot be statically analyzed".
> (this is expected, as the suggested loading here is dynamic, rather than static)
>
> - not sure exactly how this would work with localization; there is "A Caveat Regarding Locale"
> mentioned in [1] - IIUC, we will lose the automatic locale-mapping that we have today, and we would
> need to do it ourselves somehow (not a big deal, I suppose, just some extra work that needs to be
> done here).
indeed but it will pay off. a change off resources means ctrl+F5 and not 
GWT compilation :P
>
> ----
> Thanks,
> Einav
>
> [1] http://www.gwtproject.org/javadoc/latest/com/google/gwt/i18n/client/Dictionary.html
>
> ----- Original Message -----
>> From: "Roy Golan" <rgolan at redhat.com>
>> To: "engine-devel" <engine-devel at ovirt.org>
>> Sent: Wednesday, August 7, 2013 2:59:07 AM
>> Subject: [Engine-devel] Dynamic resource loading in GWT
>>
>> Painful issue here - we all know the regular drill of maintaining
>> messages in many places, I18N files and so on.
>> Also there's a patch to make all available timezone an java enum and by
>> that share it for free with the UI. its a way better than a backend Query.
>>
>> But this is all hard-coded, not flexible, hard to maintain, we all know.
>>
>> Why won't we make GWT load a javascript dictionary/dictionaries from a
>> servlet or our host page html[1] using GWT Dictionary[3]?
>>
>> that way the configuration is shared with the engine, it relies on the
>> disk, customers and GSS can change it on-site and so on.
>>
>>
>> | index.html | -> | file servlet | -> |read /etc/ovirt-engine/conf/...|
>>
>>       ^
>>        |
>>
>> | GWT loads Dictionary |
>>
>>
>> candidates for dynamic resources
>> * I18N resources AppErrors...
>> * config ( just the UI subset )
>> * osinfo ?
>>
>>
>>
>> [1] host page html -
>> http://www.gwtproject.org/doc/latest/DevGuideOrganizingProjects.html#DevGuideHostPage
>> [2] Dynamic string internationalisation -
>> http://www.gwtproject.org/doc/latest/DevGuideI18n.html#DevGuideDynamicStringInternationalization
>> [3]
>> http://www.gwtproject.org/javadoc/latest/com/google/gwt/i18n/client/Dictionary.html
>>
>> Thanks,
>> Roy
>> _______________________________________________
>> Engine-devel mailing list
>> Engine-devel at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/engine-devel
>>