lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "jefferyyuan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-7097) Update other Document in DocTransformer
Date Thu, 19 Feb 2015 19:56:12 GMT

    [ https://issues.apache.org/jira/browse/SOLR-7097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14328034#comment-14328034
] 

jefferyyuan commented on SOLR-7097:
-----------------------------------

Hi, Noble:

In some cases, we may want to change previous documents: add/update/remove fields.
Or totally remove previous documents.

One use case: in solr group flat mode: group.main=true, and groupCount to the first document
in this group:

We choose to not change Solr code in our product instead we write a new CachedXMLWriter whose
writeSolrDocument caches the SolrDocument, and write all documents out in writeEndDocumentList.

http://lifelongprogrammer.blogspot.com/2015/01/use-solr-transformer-to-gen-groupcount.html

It would be great if Solr allows us to change previous documents.


> Update other Document in DocTransformer
> ---------------------------------------
>
>                 Key: SOLR-7097
>                 URL: https://issues.apache.org/jira/browse/SOLR-7097
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: jefferyyuan
>            Priority: Minor
>              Labels: searcher, transformers
>
> Solr DocTransformer is good, but it only allows us to change current document: add or
remove, update fields.
> It would be great if we can update other document(previous especially) , or better we
can delete doc(especially useful during test) or add doc in DocTransformer.
> User case:
> We can use flat group mode(group.main=true) to put parent and child close to each other(parent
first), then we can use DocTransformer to update parent document when access its child document.
> Some thought about Implementation:
> org.apache.solr.response.TextResponseWriter.writeDocuments(String, ResultContext, ReturnFields)
> when cachMode=true, in the for loop, after transform, we can store the solrdoc in a list,
write these doc at the end.
> cachMode = req.getParams().getBool("cachMode", false);
> SolrDocument[] cachedDocs = new SolrDocument[sz];
> for (int i = 0; i < sz; i++) {
>  SolrDocument sdoc = toSolrDocument(doc);
>  if (transformer != null) {
>   transformer.transform(sdoc, id);
>  }
>  if(cachMode)
>  {
>     cachedDocs[i] = sdoc;
>  }
>  else{
>     writeSolrDocument( null, sdoc, returnFields, i );
>  }
>   
> }
> if (transformer != null) {
>  transformer.setContext(null);
> }
> if(cachMode) {
>  for (int i = 0; i < sz; i++) {
>   writeSolrDocument(null, cachedDocs[i], returnFields, i);
>  }
> }
> writeEndDocumentList();



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message