RFR 7191662: JCE providers should be located via ServiceLoader,

Chris Hegarty chris.hegarty at oracle.com
Mon May 25 08:53:07 UTC 2015


On 25/05/15 09:42, Erik Joelsson wrote:
>
> On 2015-05-22 18:53, Mandy Chung wrote:
>>
>>
>> On 05/22/2015 08:09 AM, Alan Bateman wrote:
>>>
>>> On 22/05/2015 13:55, Chris Hegarty wrote:
>>>> :
>>>> I think it could be done either way.
>>>
>>> Valerie - have you considered not pushing the services configuration
>>> files with this change? With the change then the java.security
>>> configuration is still class names, not provider names, so the
>>> fallback should just work. This is what we've done in a few other
>>> areas (like JNDI for example).
>>
>> I wasn't aware of the other areas that move to service provider but
>> remain being loaded with the fallback Class.forName.

URL protocol handlers, and JDNI initial context, fall back to 
Class.forName for built-in handlers/implementations, and do not expose 
the implementation as services.

>> I would prefer java.security should convert to use the provider names
>> as an example and also exercise the code path using service

I think URL protocol handlers works well as an example too. It is a 
minimal new service type, easy to understand. You can write your own Foo 
handler in a few lines of code.

>> providers.  If this causes much work to workaround it temporarily, I
>> won't object the security providers are not truly service providers
>> (no META-INF/services and java.security lists class name instead)
>>
>> Another option to workaround this:
>>
>> we only need to merge the service config files for generating the
>> image.  Can we have do the concatenation of
>> jdk/modules/*/META-INF/services file and output to
>> supports/image_gensrc before the images target and have the image
>> builder to exclude all jdk/modules/*/META-INF/services files and take
>> the supports/image_gensrc instead?
>>
>> This will remove the process-provider logic from Gensrc-*.gmk files.
>> Would this be a better alternative?
>>
> Maybe, I'm not sure. I still think solving this in java code in the
> ImageBuilder is the right thing to do.

If it is agreed that these files are needed, then I can look at 
expanding the ImageBuilder to do concatenate them.

-Chris.

> /Erik


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