Re: River and Backward Compatibility

Guys,

This is all good discussion but it's getting a little off-topic from the
original discussion could you switch to another thread please?

Ta,

Dan.

Greg Trasuk wrote:
> Hi again:
>
>         Thanks for the reply.  Could you answer the question below about the
> Entry objects?
>
> Thanks,
>
> Greg.
>
> On Wed, 2007-09-05 at 08:38, levmatta wrote:
>> Greg I was being generic (and vague),
>>    but I do have some thoughts on "access to the new functionality in this layer".
>
>>  As of new functionality, I can only say I do not like Entry's or command line parameters
> Entry objects are pretty core to Jini's lookup approach, as well as
> JavaSpaces.  What is it you don't like about them?
>
>> but I do like generics.
>>
>
>>   Ok, so were are doing and adapter layer.
>> Requirements:
>>   - Compile against familiar interfaces (familiar scripts, files and their locations)
>>   - Run on new implementation
>>
>> Basically I am saying, have a intermediate service implementing old interfaces on top of River.
>> To access new functionality, or if you will new interfaces, these services can either also implement the new ones or implement access interfaces.
>>
>> So, either:
>>
>> public class A implements Old, New { }
>>
>
> This approach is very "Jini-ish". If you want to use the New interface,
> you specify it in your ServiceTemplate when you do your lookup (of
> course you know that, but there are beginners on the list). The approach
> below is less Jini-ish.
>
>> OR:
>>
>> public interface Access2New {
>>   public New getNew();
>> }
>>
>> public class A implements Old, Access2New { }
>>
>> That was my thinking,
>> Thanks.
> --
> Greg Trasuk, President
> StratusCom Manufacturing Systems Inc. - We use information technology to
> solve business problems on your plant floor.
> http://stratuscom.com
>
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