[aerogear-dev] [UnifiedPush] PushApplication/Variant ID and PK generation

Fri Nov 8 02:31:55 EST 2013

Right that is what I mean

On 7 Nov,2013, at 18:26 , Matthias Wessendorf <matzew at apache.org> wrote:

> yep, all that is right.
> 
> Background: we did abuse the PK as the application/variantID, hence something like a UUID was needed - as a 1,2,3,and so on would have been odd;
> 
> Now, that we have application/variantID and the PK really has no other meaning, I guess using something like the following is OK:
> 
> @Id
> @GeneratedValue(strategy = GenerationType.AUTO)
> private String/Long id;
> 
> 
> That's what you had in mind, right ?
> 
> -Matthias
> 
> 
> On Thu, Nov 7, 2013 at 4:16 PM, Erik Jan de Wit <edewit at redhat.com> wrote:
> Don't get me wrong I know it's good practice to use a surrogate key instead of a natural one, but why does the key need to be a UUID? Seems that it's a bit big and a sequence would do just as nicely. Then we don't need this 'workaround' creating the keys by 'hand'.
> 
> Because the 'workaround' does have a problem, when would we create the id? Hibernate will 'normally' use null as a value for the id to see that it's a new entity and preforms an insert. But maybe hibernate is smart enough, because you could also use primitives for keys although that is not recommended.
> 
> Anyway that is why I suggest let's keep it simple and use a Long for the id
> 
> On 7 Nov,2013, at 14:48 , Matthias Wessendorf <matzew at apache.org> wrote:
> 
>> 
>> 
>> 
>> On Thu, Nov 7, 2013 at 2:40 PM, Lucas Holmquist <lholmqui at redhat.com> wrote:
>> 
>> On Nov 7, 2013, at 7:52 AM, Matthias Wessendorf <matzew at apache.org> wrote:
>> 
>>> 
>>> 
>>> 
>>> On Thu, Nov 7, 2013 at 1:20 PM, Erik Jan de Wit <edewit at redhat.com> wrote:
>>> +1 we can do without the hibernate dependency, making the code more portable. One question it does raise, is why are UUID used as keys? And if a class like PushApplication already has a UUID why would it need another UUID for a key?
>>> 
>>> primaryKey (database)
>>> variant/pushAPP ID (semantic meaning)
>>> 
>>> A while ago we decided to NOT use the PK as the variant/pushAPP ID; let me see if I can find the JIRA/thread
>> 
>> here is where i brought this up 
>> http://aerogear-dev.1069024.n5.nabble.com/aerogear-dev-AeroGear-Push-Message-Format-tp2773p2905.html
>> 
>> 
>> https://issues.jboss.org/browse/AGPUSH-86
>> 
>> 
>>  
>> 
>>>  
>>> 
>>> On 7 Nov,2013, at 12:38 , Matthias Wessendorf <matzew at apache.org> wrote:
>>> 
>>>> Hello, 
>>>> 
>>>> today the PushApplicationID ([1]) and VariantID (iOS example: [2]) are generated w/in the RESTful endpoint class. I'd like to move that into the actual entity - similar to what we today already do with the (master)secret (e.g. [3] or [4]).
>>>> 
>>>> Thoughts?
>>>> 
>>>> 
>>>> While on it - I'd like to do similar to the PK all ALL entities... Today we have an (odd) Hibernate dependency (see [5]), simple b/c of JPA being lame and not providing "propper" UUID support....  So idea is to
>>>> * remove the odd annotation
>>>> * do the ID generation "by hand" (like we do on the secret (see above...))
>>>> 
>>>> Thoughts?
>>>> 
>>>> Sure, this (both items of this mail) might lead to some more re-usable code (and better tests)
>>>> 
>>>> 
>>>> -Matthias
>>>> 
>>>> 
>>>> [1] https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/src/main/java/org/jboss/aerogear/unifiedpush/rest/registry/applications/PushApplicationEndpoint.java#L76
>>>> [2] https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/src/main/java/org/jboss/aerogear/unifiedpush/rest/registry/applications/iOSVariantEndpoint.java#L105
>>>> [3] https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/src/main/java/org/jboss/aerogear/unifiedpush/model/PushApplication.java#L38
>>>> [4] https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/src/main/java/org/jboss/aerogear/unifiedpush/model/AbstractVariant.java#L49
>>>> [5] https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/src/main/java/org/jboss/aerogear/unifiedpush/jpa/PersistentObject.java#L34
>>>> 
>>>> -- 
>>>> Matthias Wessendorf 
>>>> 
>>>> blog: http://matthiaswessendorf.wordpress.com/
>>>> sessions: http://www.slideshare.net/mwessendorf
>>>> twitter: http://twitter.com/mwessendorf
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>>> 
>>> 
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>>> 
>>> -- 
>>> Matthias Wessendorf 
>>> 
>>> blog: http://matthiaswessendorf.wordpress.com/
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>>> twitter: http://twitter.com/mwessendorf
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>> 
>> 
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>> 
>> -- 
>> Matthias Wessendorf 
>> 
>> blog: http://matthiaswessendorf.wordpress.com/
>> sessions: http://www.slideshare.net/mwessendorf
>> twitter: http://twitter.com/mwessendorf
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>> https://lists.jboss.org/mailman/listinfo/aerogear-dev
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> 
> 
> -- 
> Matthias Wessendorf 
> 
> blog: http://matthiaswessendorf.wordpress.com/
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