[jira] [Reopened] (HBASE-21247) Allow WAL Provider to be specified by configuration without explicit enum in Providers

["Sean Busbey (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-21247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Busbey reopened HBASE-21247:
---------------------------------

please revert this.

You can already provide a class name for something that implements WALProvider for the config "hbase.wal.provider". It's in the code and also documented in the javadoc for WALFactory.

{code}

 * Configure which provider gets used with the configuration setting "hbase.wal.provider". Available
 * implementations:
 * <ul>
 *   <li><em>defaultProvider</em> : whatever provider is standard for the hbase version. Currently
 *                                  "asyncfs"</li>
 *   <li><em>asyncfs</em> : a provider that will run on top of an implementation of the Hadoop
 *                             FileSystem interface via an asynchronous client.</li>
 *   <li><em>filesystem</em> : a provider that will run on top of an implementation of the Hadoop
 *                             FileSystem interface via HDFS's synchronous DFSClient.</li>
 *   <li><em>multiwal</em> : a provider that will use multiple "filesystem" wal instances per region
 *                           server.</li>
 * </ul>
 *
 * Alternatively, you may provide a custom implementation of {@link WALProvider} by class name.
{code}

> Allow WAL Provider to be specified by configuration without explicit enum in Providers
> --------------------------------------------------------------------------------------
>
>                 Key: HBASE-21247
>                 URL: https://issues.apache.org/jira/browse/HBASE-21247
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: 21247.v1.txt, 21247.v2.txt, 21247.v3.txt, 21247.v4.txt
>
>
> Currently all the WAL Providers acceptable to hbase are specified in Providers enum of WALFactory.
> This restricts the ability for additional WAL Providers to be supplied - by class name.
> This issue introduces additional config which allows the specification of new WAL Provider through class name.



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