libraries that split packages

[Nicolai Parlog]

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 Hi Paul,

but they _do_ get the same class loader (unless you do something fancy).

The problem is that split packages allow monkey patching and other
undesired edge cases. That a module can not read two modules which
export a split package is not an accident but a safety mechanism
supporting reliable configuration.

Then there is the fact that class loading encounters problems (what
where they exactly?) when packages are split, which means that we get
a different limitation "for free": no two modules loaded by the same
class loader may split a package - exported or not.

 so long ... Nicolai



On 22.03.2016 21:42, Paul Benedict wrote:
> Regarding split packages, would an "easy" workaround be to
> introduce a new command line option so that modules that share
> packages get the same ClassLoader?
> 
> Cheers, Paul
> 
> On Tue, Mar 22, 2016 at 3:27 PM, Richard Opalka
> <ropalka at redhat.com> wrote:
> 
>> Hi Nicolai,
>> 
>> some examples can be found here:
>> 
>> https://issues.jboss.org/browse/WFLY-6375
>> 
>> Any "Service Provider" based jar is a potential problem.
>> 
>> Rio
>> 
>> 
>> On 03/21/2016 06:39 PM, Nicolai Parlog wrote:
>> 
>>> Hi!
>>> 
>>> Are there any numbers on how severe the split package situation
>>> is, i.e. how many libraries split packages with the JDK or
>>> among themselves?
>>> 
>>> I am also interested in concrete examples. I only know of
>>> xml-apis[1] and FindBugs-JSR305[2] but I am sure many more
>>> exist.
>>> 
>>> Can anybody help me out?
>>> 
>>> so long ... Nicolai
>>> 
>>> 
>>> [1]
>>> http://search.maven.org/#artifactdetails|xml-apis|xml-apis|2.0.2|jar
>>>
>>> 
[2] http://mvnrepository.com/artifact/com.google.code.findbugs/jsr305
>>> 
>> 
>> 
> 

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