[errai-dev] Errai UI i18n Approach & Questions

Christian Sadilek csadilek at redhat.com
Wed Mar 27 15:06:32 EDT 2013 

About the other 2 :). Both seem to boil down to the same type of problem. How do I, for a given MetaClass instance, find out which module they were defined in.

I don't know the answer. I am currently digging into the GWT internals. 

If there's no way to do it we'd need to implement something ourselves. We already scan all module xml files for source paths (see RebindUtils::getOuterTranslatablePackages):
https://github.com/errai/errai/blob/3.0/errai-common/src/main/java/org/jboss/errai/common/metadata/RebindUtils.java

Combined with the MetaDataScanner that knows where the @Templated class is, we should be able to come up with a solution.

I am still digging though….

Christian

On 2013-03-27, at 2:12 PM, Eric Wittmann <eric.wittmann at redhat.com> wrote:

> Ah ha.  That makes sense.  In any case, all @ApplicationScoped beans by 
> definition (I assume) would be loaded and available by the time any 
> templates were being rendered (regardless of the presence of @LoadAsync).
> 
> I think this question is put to bed.  :)  Thanks.
> 
> Now what about the other 2?  :)
> 
> -Eric
> 
> On 03/27/2013 02:09 PM, Christian Sadilek wrote:
>> However, only a bean annotated with @LoadAsync can possibly be loaded
>> asynchronously. So, if you just look up your own bean within
>> TemplateUtil and that bean is not annotated with @LoadAsync, you should
>> be fine. The callback will always be invoked synchronously then.
>> 
>> Christian
>> 
>> On 2013-03-27, at 1:44 PM, Christian Sadilek <csadilek at redhat.com
>> <mailto:csadilek at redhat.com>> wrote:
>> 
>>> If async IOC is active, the callback will be invoked asynchronously
>>> (at least when it first downloads the source for the corresponding
>>> bean). You can take a look at the new ListWidget implementation which
>>> needs to wait until all callbacks have been executed as well:
>>> https://github.com/errai/errai/blob/master/errai-ui/src/main/java/org/jboss/errai/ui/client/widget/ListWidget.java
>>> 
>>> Another option is to make use of the InitVotes system:
>>> https://github.com/errai/errai/blob/master/errai-common/src/main/java/org/jboss/errai/common/client/api/extension/InitVotes.java
>>> 
>>> This is unfortunate but there seems to be no way around it when
>>> supporting async bean management.
>>> 
>>> Cheers,
>>> Christian
>>> 
>>> On 2013-03-27, at 1:29 PM, Eric Wittmann <eric.wittmann at redhat.com
>>> <mailto:eric.wittmann at redhat.com>> wrote:
>>> 
>>>> Is the bean lookup going to be done synchronously though (regardless of
>>>> the impl)?  That's very important in this case.  The TemplateUtil is
>>>> going to be invoked several times in sequence (different methods).  If
>>>> one of the TemplateUtil methods does something asynchronously that's a
>>>> problem.  If not, is there a wait-notify pattern that should be used?
>>>> 
>>>> -Eric
>>>> 
>>>> On 03/27/2013 01:24 PM, Christian Sadilek wrote:
>>>>> Actually we have just abstracted that. When you ask for the async
>>>>> bean manager IOC.getAsyncBeanManager() it will work in either case.
>>>>> If synchronous bean management is enabled it will return an adapter
>>>>> where the callback will just immediately be invoked.
>>>>> 
>>>>> So, just always use the async bean manager API.  That code can of
>>>>> course also be generated, if you wanted/needed to.
>>>>> 
>>>>> On 2013-03-27, at 1:19 PM, Eric Wittmann <eric.wittmann at redhat.com
>>>>> <mailto:eric.wittmann at redhat.com>> wrote:
>>>>> 
>>>>>> I think the advent of the async bean manager may have complicated this
>>>>>> though, right?  I don't *think* I can simply get the bean manager and
>>>>>> ask it for the bean (there are a couple of different getters now - one
>>>>>> to get the sync bean manager and one to get the async bean manager).
>>>>>> 
>>>>>> One thing I tried that worked but that I don't like:  turn the
>>>>>> @ApplicationScoped bean into a singleton and reference it using a
>>>>>> static
>>>>>> method.  Ugly but worked.  Ideally I think TemplateUtil should
>>>>>> itself be
>>>>>> an injected bean, rather than a class with some static methods.
>>>>>> 
>>>>>> But that just moves the problem to "how do I reference an injected bean
>>>>>> in code generated by a Decorator/Extension?"  :)
>>>>>> 
>>>>>> On 03/27/2013 01:13 PM, Lincoln Baxter, III wrote:
>>>>>>> To answer Question #3, this would either need to be coded into the
>>>>>>> call
>>>>>>> to TemplateUtil from the BootstrapperImpl code (done in
>>>>>>> DecoratorTemplated.java) or I believe there is a convenience
>>>>>>> utility to
>>>>>>> get the BeanManager in Errai:
>>>>>>> 
>>>>>>> CDI.current() or something like that. Mike?
>>>>>>> 
>>>>>>> 
>>>>>>> On Tue, Mar 26, 2013 at 12:20 PM, Eric Wittmann
>>>>>>> <eric.wittmann at redhat.com <mailto:eric.wittmann at redhat.com>
>>>>>>> <mailto:eric.wittmann at redhat.com>> wrote:
>>>>>>> 
>>>>>>>   Hey guys.  I've sketched out a proposed approach (not 100%
>>>>>>> compete but
>>>>>>>   ok to start) for i18n.  Would appreciate it if you could take a
>>>>>>> look
>>>>>>>   at it.
>>>>>>> 
>>>>>>>   At the bottom you will find 3 questions that I would (in
>>>>>>> particular)
>>>>>>>   love your thoughts on.
>>>>>>> 
>>>>>>> https://docs.google.com/document/d/1BapD4FHMNur0OYdIg-vwXYHWW_2Mhra_Ki2nYAh9qxY/pub
>>>>>>> 
>>>>>>>   -Eric
>>>>>>>   _______________________________________________
>>>>>>>   errai-dev mailing list
>>>>>>> errai-dev at lists.jboss.org <mailto:errai-dev at lists.jboss.org>
>>>>>>> <mailto:errai-dev at lists.jboss.org>
>>>>>>> https://lists.jboss.org/mailman/listinfo/errai-dev
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> --
>>>>>>> Lincoln Baxter, III
>>>>>>> http://ocpsoft.org <http://ocpsoft.org/>
>>>>>>> "Simpler is better."
>>>>>>> 
>>>>>>> 
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>>>>>>> https://lists.jboss.org/mailman/listinfo/errai-dev
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