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From Jörg Schaible <joerg.schai...@gmx.de>
Subject Re: java.util.Service
Date Thu, 09 Mar 2006 20:57:18 GMT
Simon Kitching wrote:

> On Thu, 2006-03-09 at 09:04 -0800, Craig McClanahan wrote:
>> On 3/9/06, Jörg Schaible <Joerg.Schaible@elsag-solutions.com> wrote:
>> >
>> > Hi folks,
>> >
>> > do we have something like the java.util.Service class introduced with
>> > JDK 1.6 withing Jakarta? This is basically a proper API to access the
>> > Service Provider mechanism described here:
>> >
http://java.sun.com/j2se/1.4.2/docs/guide/jar/jar.html#Service%20Provider
>> 
>> 
>> The closest analog is probably the "Commons Discovery" package, which
>> utilizes a variety of strategies to do service discovery (including,
>> IIRC, the META-INF service lookup trick).
> 
> As it happens, I've just implemented Service functionality as part of a
> JCL 2.x experimental prototype (including unit tests). You're welcome to
> the code..
>  
>
http://svn.apache.org/repos/asf/jakarta/commons/proper/logging/contrib/simon/jcl2/core/java/org/apache/commons/logging/Utils.java
> 
>
http://svn.apache.org/repos/asf/jakarta/commons/proper/logging/contrib/simon/jcl2/core/


I'll have a look.


> Regretfully I don't have a lot of confidence in the commons-discovery
> code. There are *so* many weird classpath-related situations that can
> occur inside containers that any code of more than trivial complexity is
> almost certain to be wrong in some circumstances. If you want Service
> support, I would recommend *just* implementing Service support rather
> than using commons-discovery.

... and as an upcoming JDK 1.6 core functionality this would make a good
citizen of lang ?

:)

- Jörg




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