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https://issues.apache.org/jira/browse/SOLR-1226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12997243#comment-12997243
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Lance Norskog commented on SOLR-1226:
-------------------------------------

# DIH is multi-threaded now. Does this need reworking?
# ThreadLocal is old-school- there's some lighter-weight concurrent container 
these days.

> XPathEntityProcessor should resolve xsl references within Solr's configuration
> ------------------------------------------------------------------------------
>
>                 Key: SOLR-1226
>                 URL: https://issues.apache.org/jira/browse/SOLR-1226
>             Project: Solr
>          Issue Type: Improvement
>          Components: contrib - DataImportHandler
>    Affects Versions: 1.4
>            Reporter: David Smiley
>            Assignee: Noble Paul
>            Priority: Minor
>             Fix For: Next
>
>         Attachments: SOLR-1226.patch
>
>
> The XPathEntityProcessor forces me to use a URL to specify where my XSL file 
> is.  if it is not a URL, what it should do is attempt to resolve it from 
> Solr's configuration  via SolrCore.getREsourceLoader().  I have attached a 
> patch which does this.
> Note: it is not clear in the DIH what the concurrency model is and thus I was 
> not certain that XPathEntityProcessor needs to be thread-safe or not.  So 
> just in case I cached the XSLT Transformer in a thread-safe manner using a 
> ThreadLocal.  If DIH committers know that it doesn't have to be thread-safe 
> then some of this code can be simplified.

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