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https://issues.apache.org/jira/browse/SOLR-853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12650033#action_12650033
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Noble Paul commented on SOLR-853:
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bq.Once you decide you want a modular design, why limit it to storing in Lucene?

It is possible , but DIH is designed to create target documents in a 
denormalized form (a single table) . This is quite unique to Lucene. 

While a few users might find it useful, it can't be generalized. The moment it 
is made possible , there may be requests for enhancements specific to DB . I do 
not wish to get into the domain of Kettle or Talend. 

But I shall leave the core generic enough to be used by others



> Make DIH API friendly
> ---------------------
>
>                 Key: SOLR-853
>                 URL: https://issues.apache.org/jira/browse/SOLR-853
>             Project: Solr
>          Issue Type: Improvement
>          Components: contrib - DataImportHandler
>            Reporter: Noble Paul
>            Assignee: Shalin Shekhar Mangar
>         Attachments: SOLR-853.patch
>
>
> DIH currently can only be run inside Solr. But the core of DIH is quite 
> independent of Solr. There are only a few points where it requires Solr core 
> classes.They can be isolated out and we have an API in hand. If we limit the 
> dependency down to common util then DIH can be used by 
>  * Lucene users directly
>  * Run DIH remotely with SolrJ
>  * By any other tools using Lucene as their underlying  datastore

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