RFR: JDK-8199352: The Jib artifact resolver in test lib needs to print better error messages

[Magnus Ihse Bursie]

> 9 mars 2018 kl. 01:06 skrev Erik Joelsson <erik.joelsson at oracle.com>:
> 
>> On 2018-03-08 15:24, Igor Ignatyev wrote:
>> Hi Erik,
> Thanks for looking at this!
>> to avoid incompatibility, you could have just made ArtifactResolverException a subclass of java.io.FileNotFoundException.
> This is correct, but I don't think the exception should be of type FileNotFoundException. IMO, this is something different and trying to re-purpose an existing exception type is rarely a good idea.

I agree. 

>> it seems you forgot to add ArtifactResolverException.java file to the repo.
> Doh! Added.
>> a minor nit: in JibArtifactManager::newInstance, you pass "Could not resolve " + JIB_SERVICE_FACTORY to ClassNotFoundException constructor. by the convention, the message in CNFE is the classname.
> Right, good point, fixed.
> 
> New Webrev: http://cr.openjdk.java.net/~erikj/8199352/webrev.02/

Looks good to me. 

/Magnus

> 
> /Erik
>> -- Igor
>> 
>>> On Mar 8, 2018, at 2:08 PM, Erik Joelsson <erik.joelsson at oracle.com> wrote:
>>> 
>>> The Jib artifact resolver is not very good at telling us why things go wrong. The reason is that it swallows exceptions. This patch changes the API from throwing a FileNotFoundException, which I don't really think fits correctly in all cases, to a new API specific exception.
>>> 
>>> I have greped for all uses of this API in the tests and changed the exception type caught at the caller location. I verified that I didn't break anything by compiling all the affected test classes and by running some of them for a bit.
>>> 
>>> With these changes it should be easier to diagnose problems with resolving artifacts in the future.
>>> 
>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8199352
>>> 
>>> Webrev: http://cr.openjdk.java.net/~erikj/8199352/webrev.01/index.html
>>> 
>>> /Erik
>>> 
>