[infinispan-issues] [JBoss JIRA] (ISPN-1242) Add dynamic grouping capabilities for unmodifiable key classes.

[Mircea Markus (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-1242?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mircea Markus updated ISPN-1242:
--------------------------------

    Component/s: Core

    
> Add dynamic grouping capabilities for unmodifiable key classes.
> ---------------------------------------------------------------
>
>                 Key: ISPN-1242
>                 URL: https://issues.jboss.org/browse/ISPN-1242
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Core
>    Affects Versions: 5.0.0.CR7
>            Reporter: Erik Salter
>            Assignee: Pete Muir
>
> The grouping API should be enhanced to add grouping capabilities to a a cache's put() or replace() methods.
> This encompasses the following scenario:
> Cache A uses a custom key class where the group is dynamically generated. Cache B's key is an unmodifiable String that needs to be grouped with the dynamic value of a key from Cache A. (Cache B's key can't be encapsulated in a custom key class since it needs to be queried from external entities that will not know the group context).
> And in pseudo-code:
> {code}
> Group class InternalResourceKey { 
>    String group;
>    ... 
>    @Group
>    String getGroup() {
>       return group;
>    }
>  }
> InternalResourceKey key = new InternalResourceKey(); 
> {code}
> ...
> {code}
> resourceCache.lock( key );
> // Get the previous result.
> ResourceResult result = resourceCache.get( key );
> ResourceResult newResult = doWork( key, result );
> resourceCache.put( key, newResult );
> // I also want to group an external identifier that an external client knows about with the result so they will be on the same node
> employeeCache.put( "111-111-1111", newResult, key.getGroup() );
> {code}

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