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https://issues.apache.org/jira/browse/SOLR-10703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16041318#comment-16041318
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ASF GitHub Bot commented on SOLR-10703:
---------------------------------------

Github user diegoceccarelli commented on a diff in the pull request:

    https://github.com/apache/lucene-solr/pull/202#discussion_r120700095
  
    --- Diff: 
solr/core/src/java/org/apache/solr/response/transform/DocTransformers.java ---
    @@ -88,4 +89,11 @@ public boolean needsSolrIndexSearcher() {
         return false;
       }
     
    +  @Override
    +  public void finish() {
    +    for( DocTransformer a : children ) {
    +      a.finish();
    --- End diff --
    
    yes? I think that if a transformer throws an exception solr request should 
fail (you can still try and catch the exception inside the transformer if you 
want to obtain 'silent' behaviour) what do you think? 


> Add prepare() and finish() into DocTransformer 
> -----------------------------------------------
>
>                 Key: SOLR-10703
>                 URL: https://issues.apache.org/jira/browse/SOLR-10703
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Diego Ceccarelli
>            Priority: Minor
>             Fix For: master (7.0)
>
>
> This patch adds a {{prepare}} and a {{finish}} method to the interface of 
> {{DocTransformer}} allowing a developer to perform actions before/after a doc 
> transformer is applied to a result set. My use case was to benchmark the 
> performance of a transformer, since transformer time is not part of 
> {{QTime}}. 



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