[infinispan-issues] [JBoss JIRA] (ISPN-3105) Design query API for both embedded use and Java Hot Rod client

[Mircea Markus (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-3105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mircea Markus updated ISPN-3105:
--------------------------------

    Priority: Blocker  (was: Major)

    
> Design query API for both embedded use and Java Hot Rod client
> --------------------------------------------------------------
>
>                 Key: ISPN-3105
>                 URL: https://issues.jboss.org/browse/ISPN-3105
>             Project: Infinispan
>          Issue Type: Task
>          Components: Querying
>            Reporter: Mircea Markus
>            Assignee: Adrian Nistor
>            Priority: Blocker
>              Labels: remote-query
>             Fix For: 6.0.0.Alpha2, 6.0.0.Final
>
>
> There are several parts to this JIRA.
> 1.  We'd need a query API to be able to run queries on a cache.  For example:
> {code:java}
>    // Super-interface to Cache and RemoteCache
>    public interface BasicCache {
>    ...
>       Set<?> runQuery(Filter f);
>    ...
>    }
> {code}
> such that the same API can be used for remote (for the Hot Rod Java client) as well as embedded querying.
> 2.  Since the approach we're using is effectively to look at the global data set and apply a series of filters, we'd need a {{FilterBuilder}} as well to create such filters.  E.g.,
> {code:java}
>   new FilterBuilder().matches("name", "QueenElizabeth").and().greaterThan("age", 65).build();
> {code}
> The Hibernate Search query DSL could probably be used for inspiration.
> 3.  Further, we should still have an API that takes in Lucene Query objects - as per the existing Query API - but this would be for embedded mode only.  E.g.,
> {code:java}
>   public interface Cache {
>     ...
>     Set<?> runLuceneQuery(LuceneQuery q);
>     ...
>   }
> {code}
> 4.  Projections.  We may also want to support projections.  This needs thought.  Again, Hibernate Search's APIs can provide inspiration.

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