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From "Rory O'Donnell" <rory.odonn...@oracle.com>
Subject Re: Apache Commons Configuration & Bean Scripting Framework (BSF) - dependencies on JDK-Internal APIs
Date Fri, 19 Jun 2015 15:29:34 GMT
Hi Oliver,

That's great, thanks for your help.

Rgds,Rory

On 19/06/2015 16:27, Oliver Heger wrote:
> Hi Rory,
>
> I just ran JDeps against the current beta-1 release of Commons
> Configuration 2.0 and all its dependencies. When specifying the
> "-jdkinternals" option there is no output. So I think, we are clean here.
>
> Regards
> Oliver
>
> Am 15.06.2015 um 10:04 schrieb Rory O'Donnell:
>> Hi Benedict,
>>
>> I'm contacting you in relation to Apache Commons Configuration & Bean
>> Scripting Framework (BSF),  both projects seems to be  very popular
>> dependencies for other open source projects.
>>
>> As part of the preparations for JDK 9, Oracle’s engineers have been
>> analyzing open source projects like yours to understand usage. One area
>> of concern involves identifying compatibility problems, such as reliance
>> on JDK-internal APIs.
>>
>> Our engineers have already prepared guidance on migrating some of the
>> more common usage patterns of JDK-internal APIs to supported public
>> interfaces.  The list is on the OpenJDK wiki [0].
>>
>> As part of the ongoing development of JDK 9, I would like to inquire
>> about your usage of  JDK-internal APIs and to encourage migration
>> towards supported Java APIs if necessary.
>>
>> The first step is to identify if your application(s) is leveraging
>> internal APIs.
>>
>> /Step 1: Download JDeps. /
>>
>>     Just download a preview release of JDK8(JDeps Download
>>     <https://jdk8.java.net/download.html>). You do not need to actually
>>     test or run your application on JDK8. JDeps(Docs
>>     <http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jdeps.html>)
>>     looks through JAR files and identifies which JAR files use internal
>>     APIs and then lists those APIs.
>>
>> /Step 2: To run JDeps against an application/. The command looks like:
>>
>>     jdk8/bin/jdeps -P -jdkinternals *.jar > your-application.jdeps.txt
>>
>>     The output inside your-application.jdeps.txt will look like:
>>
>>     your.package (Filename.jar)
>>            -> com.sun.corba.se            JDK internal API (rt.jar)
>>
>> _3rd party library using Internal APIs:_
>> If your analysis uncovers a third-party component that you rely on, you
>> can contact the provider and let them know of the upcoming changes. You
>> can then either work with the provider to get an updated library that
>> won't rely on Internal APIs, or you can find an alternative provider for
>> the capabilities that the offending library provides.
>>
>> _Dynamic use of Internal APIs:_
>> JDeps can not detect dynamic use of internal APIs, for example through
>> reflection, service loaders and similar mechanisms.
>>
>> Rgds,Rory
>>
>> [0]
>> https://wiki.openjdk.java.net/display/JDK8/Java+Dependency+Analysis+Tool
>>
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-- 
Rgds,Rory O'Donnell
Quality Engineering Manager
Oracle EMEA , Dublin, Ireland


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