[jira] [Resolved] (SOLR-6819) Being able to configure the updates log implementation from solrconfig.xml

["Erick Erickson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-6819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Erick Erickson resolved SOLR-6819.
----------------------------------
    Resolution: Implemented

I checked the code and it's there, so closing.

> Being able to configure the updates log implementation from solrconfig.xml
> --------------------------------------------------------------------------
>
>                 Key: SOLR-6819
>                 URL: https://issues.apache.org/jira/browse/SOLR-6819
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud, update
>    Affects Versions: 6.0
>            Reporter: Renaud Delbru
>         Attachments: SOLR-6819.patch, SOLR-6819.patch
>
>
> CDCR requires its own implementation of the updates log. At the moment, there is no way to configure the class to use when instantiating the updates log. The UpdateHandler is deciding to instantiate the base class UpdateLog or its hdfs version HdfsUpdateLog based on the directory path prefix.
> We can extend the UpdateHandler to allow for a class parameter to be defined for the updateLog section of the solrconfig.xml. For example, the relevant part of the solrconfig,xml will look like:
> {code:xml}
>   <updateHandler class="solr.DirectUpdateHandler2">
>     <updateLog class="solr.CdcrUpdateLog">
>       <str name="dir">${solr.ulog.dir:}</str>
>     </updateLog>
>   </updateHandler>
> {code} 
> where the updateLog entry has a parameter class that indicates that the CdcrUpdateLog implementation must be used.



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