[infinispan-dev] KeyAffinityService

[cotton-ben]

We need a way for a "foreign" node to be able to come up with the same
affinityKey produced earlier by a "local" node.

Thanks for the response, Mircea.  Let me elaborate.

E.g.  consider the infinispan quick start that is made up of
AbstractNode.java, Node0.java, Node1.java, Node2.java

Let's say that @t=0  we execute the following code within Node0.java:

//assume keySvc reference constructed and .start()  invoked

Object pinnedDimensionKeyAffinityAtNode0 =
keySvc.getCollocatedKey(myObjectNaturalKey);
this.dimensionsPinnedCache.put(pinnedDimensionKeyAffinityAtNode0, myObject);


Now, let's say it is @t=1 and we want to get() 'myObject' from code within
Node2.java ... how?
I don't think it is possible with the existing API.  However if you add the
signature requested, I could do
something like this:

Object pinnedKey = keySvc.getKeyForAddress(getAddress(Node0),
myObjectNaturalKey);//need this API!
myObject = this.dimensionsPinnedCache.get(pinnedKey);


I need some way for Node2.java to know that it can re-compute the
affinityKey rendered by Node0.java ... that way Node2 can operate on <K,V>
sets pinned by affinity to Node0

Maybe I am missing something, is there some with the existing 5.3 API for
Node2 to do this?  Or do we need to add the signature suggested at
https://issues.jboss.org/browse/ISPN-3112?

As far as I can tell, I think we need to add the requested signature. 
Without it, I don't think Node2.java can do the operation described above.




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