[PATCH] Enhance ServiceLoader to understand factory methods

David Holmes - Sun Microsystems David.Holmes at Sun.COM
Thu Oct 16 19:56:13 UTC 2008

Hi Jaroslav,

If this is a modification to the API not just a patch for the 
implementation then the short answer is No. API changes have to be made 
via a JSR.

David Holmes

On 17/10/08 03:38 AM, Jaroslav Tulach wrote:
> Hi.
> I can imagine, dear core-libs members, that you are all busy with your jobs,
> however at least give me hope: Can I get my patch into the OpenJDK in
> reasonable timeframe or not?
> Thanks in advance for your reply.
> -jst
> Jaroslav Tulach wrote:
>> Proposal: Enhance ServiceLoader to understand factory methods
>> Justification: A lot of our services in NetBeans are final classes. Still,
>> we
>> would like to use the META-INF/services registration to register their
>> providers. Currently this does not work, we either need to unfinalize the
>> classes (which restricts future evolution options) or use different ways
>> of registering the providers. We propose simple and backward compatible
>> extension to current ServiceLoader registration scheme. If accepted,
>> NetBeans'll eliminate our non-standard registration methods, while keeping
>> benefits of final classes. Moreover the same techniques will be available
>> to any JavaSE project.
>> Risks: API change includes simple, compatible extension. New code is able
>> to accept old registrations. Old code (JDK6) will generate
>> ServiceConfigurationError in case of seeing new registration, however.
>> Test: I have found tests in test/java/util/ServiceLoader/ directory and
>> I've modified them to verify also our new usecase. All of them are
>> passing, if I run them by running ./basic.sh script - I am not sure if
>> that is the right way of running your tests.
>> I am attaching my current patch. Let me know what shall I change to allow
>> this
>> to be integrated to OpenJDK7. Thanks a lot.
>> Jaroslav Tulach
>> NetBeans Platform Architect

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