Re: [infinispan-dev] [ISPN-548] Discussion on updating the QueryInterceptor to be able to update old keys
On 21 Jul 2010, at 12:54, Navin Surtani wrote:
Just getting a discussion going on this since a JIRA has now been
created.
Basically, the way I see it is that we can check which keys in the cache
have already been used - but that's context specific (I'll probably need
a quick explanation to how the InvocationContexts work). The question
for the gurus of ISPN here is whether or not this is going to be an issue.
The plan of attack is as follows: -
1 - User does a put()
2 - Interceptor checks the set of keys used within the same context to
see if the same key has been used
That can be achieved through:
CacheEntry cacheEntry = ctx.lookupEntry(command.getKey());
The CacheEntry corresponds to a (key,value) pair in the cache.
Now, you can check the following:
1. (key,value) has been newly added?
cacheEntry.isCreated()
2. or is it just updated?
cacheEntry.isChanged()
3 - If it has an UPDATE is used.
4 - If not we do an ADD.
Reckon that sounds okay?
--
Navin Surtani
Intern Infinispan
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HTH,
Mircea