[infinispan-issues] [JBoss JIRA] (ISPN-3112) KeyAffinityService API - provide overload of getKeyForAddress()

[Ben Cotton (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-3112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12788243#comment-12788243 ] 

Ben Cotton commented on ISPN-3112:
----------------------------------


The resolution of this JIRA fixes what we believe is a KeyAffinityService API delinquency.  I.e.

When my DIST_SYNC  Cache’s Node X (@t=0) generates an Affinity-Key ‘aK’ for a Natural-Key ‘nK’ via



            aK =  kas.getCollocatedKey(nK);   // aK guarantees that nk will be pinned at Node X

            cache.put(aK, V);                 // pin the nK’s VALUE (via aK) at Node X



Later, from my Cache’s Node Y (@t=1) I want to now   get()  the nK’s VALUE that was pinned at Node X (@t=0) without having Node Y to have an available reference to the previously computed AffintyKey aK.  I currently cannot do that with the 5.x ISPN API.

We need ISPN-3112 resolved so that from Node Y (@t=1) I can simply code



            // get VALUE from pinned node with nK – no need for an ‘aK’ reference

            V = cache.get(kas.getKeyForAddress(this.getAddress(NodeX), nK);  



                
> KeyAffinityService API - provide overload of getKeyForAddress()
> ---------------------------------------------------------------
>
>                 Key: ISPN-3112
>                 URL: https://issues.jboss.org/browse/ISPN-3112
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Distributed Cache
>    Affects Versions: 5.3.0.Beta1
>            Reporter: Ben Cotton
>            Assignee: Mircea Markus
>            Priority: Minor
>
> Add to the org.inifinispan.affinity.KeyAffinityService<K> interface an overload =
>           *K     getKeyForAddress(Address address, K otherKey);*    
> //compute address specific version of 'otherKey'

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