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Re: [jakartaee-platform-dev] VOTE: backward compatibility for descriptor schemas
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#3, although I expect existing servers will keep support for older schemas.
#3 +1
> On 21 Jan 2020, at 21:53, Bill Shannon <bill.shannon@xxxxxxxxxx> wrote:
>
> After the discussion in today's meeting, I agreed to send out a list
> of alternatives and ask for votes. We'll tally the votes and make a
> decision in next week's meeting.
>
> Here's the alternatives we're considering:
>
> 1. Support for Jakarta EE 8 and earlier schemas is *optional* in
> Jakarta EE 9 products.
>
> 2. Support for Jakarta EE 8 and earlier schemas is *required* in
> Jakarta EE 9 products.
>
> 3. Support for Jakarta EE 8 *but not* earlier schemas is *required* in
> Jakarta EE 9 products; support for schemas earlier than Jakarta EE 8
> is *optional* in Jakarta EE 9 products.
>
> I'm not going to reiterate the pros and cons, but if you have any questions
> about why or why not to support one of these options, let me know.
>
> Note that the "earlier" criteria can be somewhat confusing since not all
> schemas were updated in Jakarta EE 8 (really Java EE 8) so some of the
> "most current" schemas are from Java EE 7 or earlier. In such cases these
> would still be considered Jakarta EE 8 schemas.
>
> I'm sure there are other alternatives that are possible, but I don't think
> we need to make this more complex at this point.
>
> Vote now! We'll decide next week.
>
> Thanks.
>
>
> Bill Shannon wrote on 1/20/20 12:38 PM:
>> We need to update all the descriptor schemas to switch to a new URL.
>> What should we do about support for the old schemas?
>>
>> Should we handle this just like support for the old package names and
>> leave it to products to decide whether or not to support the old schemas?
>>
>> Or should we continue to require that products support all the old schemas
>> as well as the new version?
>>
>>
>> At first it seemed simpler and cleaner if new products with no need for
>> backward compatibility could just support the new schema. But just like
>> in the past, the schemas will continue to evolve as the specs evolve and
>> products will need to be able to support multiple schemas. So, in the
>> long run, it's not clear this really saves a lot for new products.
>>
>> I guess I'm inclined to say that products must support all defined versions
>> of the schema and this is not a "backward compatibility" issue.
>>
>> Comments?
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