It might give you a very slight edge to use a singleton as you (or the
annotation processor in this case) don't have to introspect and work
through a proxy. If you're not bothered by singletons (I, for one
typically are): go for it. However, keep that famous 'premature
optimization is the root of all evil' in mind; 99.9% chance you're
optimizing something that will never ever become a bottleneck.
Eelco
2009/7/27 Murat Yücel <kodeperke...@gmail.com>:
> Hi Jason
>
> I dont have a performance comparison, but i cannot see why you should
> gain better performance.
> All spring beans are as default singleton, so you will just forward a
> singleton using a singleton.
>
> /Murat
>
> 2009/7/28 Jason Wang <jason.w...@bulletin.net>:
>> Hi all,
>>
>> Although I am using spring-wicket to prevent the whole spring being
>> serialized, It still brothers me to see the references in the model
>> object, for example:
>>
>> Instead of using this:
>>
>> public class MyViewObjectProvider extends SortableDataProvider{
>> �...@springbean("daoService")
>> private DAOServices daoService;
>>
>> private String objectID;
>>
>> public Iterator iterator(final int first, final int count){
>> .....
>> return daoService.load(objectId).subList(first,
>> first+count).iterator();
>> }
>>
>> }
>>
>>
>>
>> I always write a singleton helper class for the service to be used, so I can
>> have the model this way:
>>
>> public class MyViewObjectProvider extends SortableDataProvider{
>> //so no reference to the dao service object
>>
>> private String objectID;
>> public Iterator iterator(final int first, final int count){
>> .....
>> //here the DAOServiceHelper.get() returns a instance that managed by
>> spring(with the actual service object injected.)
>> return DAOServiceHelper.get().load(objectId).subList(first,
>> first+count).iterator();
>> }
>>
>> }
>>
>> So my question is, will there be a noticeable performance gain to do it the
>> 2nd way?
>> The reason to ask is that the static kind of singleton usage is indeed
>> anti-spring, and makes
>> my eyes bleed....
>>
>> If no one has done a performance comparison, I might have to do one myself.
>> Just being lazzzzzy...
>>
>>
>> Thanks,
>>
>> Jason Wang
>>
>>
>>
>>
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