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https://issues.apache.org/jira/browse/SOLR-1554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14701230#comment-14701230
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James Dyer commented on SOLR-1554:
----------------------------------

Just looking at this patch quickly, I see that UrlCallbackListener.java 
correctly implements the EventListener interface.  So if we included this in 
our distribution, users could just specify this for "onImportEnd" as shown [on 
the old wiki 
page|https://wiki.apache.org/solr/DataImportHandler#EventListeners] . 

Its not clear to me why the other 3 classes need modification.  Also, a unit 
test would be nice, but arguably a pain to write.

> Passing a callback url to DIH
> -----------------------------
>
>                 Key: SOLR-1554
>                 URL: https://issues.apache.org/jira/browse/SOLR-1554
>             Project: Solr
>          Issue Type: New Feature
>          Components: contrib - DataImportHandler
>    Affects Versions: 1.5, 3.1
>            Reporter: Sascha Szott
>            Priority: Minor
>         Attachments: SOLR-1554.patch
>
>
> To provide an easy way to check if an DIH import process is completed (i.e., 
> without having to implement a custom Solr EventListener), it should be 
> possible to pass a callback url along a URL to a DIH request handler. 
> Ideally, the callback should somehow indicate the import operation's result 
> (successful / not successful). This would obviate an additional call of the 
> request handler to get the import operation's result and statistics, 
> respectively.



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