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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4275) Refactor e/pstore interfaces and their factories to provide a unified mechanism to access stores
Date Mon, 15 Feb 2016 23:49:18 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15147912#comment-15147912
] 

ASF GitHub Bot commented on DRILL-4275:
---------------------------------------

Github user sudheeshkatkam commented on a diff in the pull request:

    https://github.com/apache/drill/pull/374#discussion_r52954392
  
    --- Diff: contrib/storage-hbase/src/main/java/org/apache/drill/exec/store/hbase/config/HBasePersistentStoreProvider.java
---
    @@ -41,10 +39,8 @@
     import org.apache.hadoop.hbase.client.HTableInterface;
     import org.apache.hadoop.hbase.util.Bytes;
     
    -import com.google.common.annotations.VisibleForTesting;
    -
    -public class HBasePStoreProvider implements PStoreProvider {
    -  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(HBasePStoreProvider.class);
    +public class HBasePersistentStoreProvider extends BasePersistentStoreProvider {
    +  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(HBasePersistentStoreProvider.class);
    --- End diff --
    
    _private_ for all loggers of *Provider and *Store would be nice :)


> Refactor e/pstore interfaces and their factories to provide a unified mechanism to access
stores
> ------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-4275
>                 URL: https://issues.apache.org/jira/browse/DRILL-4275
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Flow
>            Reporter: Hanifi Gunes
>            Assignee: Deneche A. Hakim
>
> We rely on E/PStore interfaces to persist data. Even though E/PStore stands for Ephemeral
and Persistent stores respectively, the current design for EStore does not extend the interface/functionality
of PStore at all, which hints abstraction for EStore is redundant. This issue proposes a new
unified Store interface replacing the old E/PStore that exposes an additional method that
report persistence level as follows:
> {code:title=Store interface}
> interface Store<V> {
>   StoreMode getMode();
>   V get(String key);
>   ...
> }
> enum StoreMode {
>   EPHEMERAL,
>   PERSISTENT,
>   ...
> }
> {code}
> The new design brings in less redundancy, more centralized code, ease to reason and maintain.



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