good place to remind that if you don't want the return value of a
write operation then you need to specify both flags:
cache.withFlags(Flag.SKIP_REMOTE_LOOKUP, Flag.SKIP_CACHE_LOAD).put( .. )
I guess that nobody knows that :)
Sanne
2011/5/16 Emmanuel Bernard <emmanuel(a)hibernate.org>:
Yes I think something use case driven would make a nice portal.
On 16 mai 2011, at 17:22, Galder Zamarreño wrote:
>
> On May 16, 2011, at 2:23 PM, Emmanuel Bernard wrote:
>
>> Your description explains a use case / pattern but wo code showing how to
implement it properly.
>
> True and I think you have a point, though the use of putForExternalRead() itself is
something that should be documented either its javadoc or a separate wiki.
>
> This wiki should be limited to explaining the actual flags.
>
>> In this case what's the best way for me to verify that the new data has
indeed been pushed to the cache?
>> put and then immediate get
>> Put, wait, get
>> Put all entries, then get all entries, and loop till all entries supposedly put
are indeed present.
>> Same as above but with some kind of batch size instead of all the data set?
>> Or is there some kind of queue/log I can look for to get the reliable list of
failures?
>
> If you need immediate verification I would not use putForExternalRead() but maybe a
putAsync() with the flags you want which returns you a future and allows you to verify the
result in a less wacky way.
>
> The normal use case of PFER is:
> 1. Check the cache whether an k/v is present
> 2. If not present, go to db and call PFER with it.
> 3. Use whatever you retrieved from db to do your job.
> ...
> N. Check the cache whether k/v is present
> N+1. Oh, it's present, so just use it instead of going to DB.
>
> This could be a good FAQ, wdyt?
>
>>
>> Emmanuel
>>
>>
>> On 16 mai 2011, at 10:20, Galder Zamarreño <galder(a)redhat.com> wrote:
>>
>>> More wikis. I've just created
http://community.jboss.org/docs/DOC-16803
which explains what Infinispan flags are, what they're used for...etc.
>>>
>>> Feedback appreciated
>>> --
>>> Galder Zamarreño
>>> Sr. Software Engineer
>>> Infinispan, JBoss Cache
>>>
>>>
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>>>
https://lists.jboss.org/mailman/listinfo/infinispan-dev
>>
>> _______________________________________________
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>>
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>
> --
> Galder Zamarreño
> Sr. Software Engineer
> Infinispan, JBoss Cache
>
>
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> infinispan-dev(a)lists.jboss.org
>
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