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From "Enis Soztutar (JIRA)" <>
Subject [jira] Commented: (NUTCH-442) Integrate Solr/Nutch
Date Mon, 15 Oct 2007 15:33:50 GMT


Enis Soztutar commented on NUTCH-442:

Using nutch with solr has been a very demanding request, so it will be very useful when this
makes into trunk. I have spend some time reviewing the patch, which I find quite elegant.

Some improvements to the patch would be 
- make NutchDocument implement VersionedWritable instead of writable, and delegate version
checking to superclass
- refactor getDetails() methods in HitDetailer to Searcher (it is not likely that a class
would implement Searcher but not HitDetailer)
- use Searcher, delete HitDetailer and SearchBean 
- Rename XXXBean classes so that they do not include "bean". (I think it is confusing to have
bean objects that have non-trivial functionality)
- refactor LuceneSearchBean.VERSION to RPCSearchBean
- remove unrelated changes from the patch.(the changes in NGramProfile, HTMLLanguageParser,LanguageIdentifier,...
correct me if i'm wrong)

As far as i can see, we do not need any metadata for Solr backend, and only need Store,Index
and Vector options for lucene backend, so i think we can simplify NutchDocument#metadata.
We may implement :  
class FieldMeta {
o.a.l.document.Field.Store store;
o.a.l.document.Field.Index index;
o.a.l.document.Field.TermVector tv;

FieldMeta[] IndexingFilter.getFields();

class NutchDocument {
private ArrayList<Field> fieldMeta;


Or alternatively we may wish to keep add methods of NutchDocument compatible with o.a.l.document.Document,
keeping the metadata up-to-date as we add new fields, using this info at LuceneWriter, but
ignoring in SolrWriter. This will be slightly slower but the API will be much more intuitive.

> Integrate Solr/Nutch
> --------------------
>                 Key: NUTCH-442
>                 URL:
>             Project: Nutch
>          Issue Type: New Feature
>         Environment: Ubuntu linux
>            Reporter: rubdabadub
>         Attachments: NUTCH_442_v3.patch, RFC_multiple_search_backends.patch, schema.xml
> Hi:
> After trying out Sami's patch regarding Solr/Nutch. Can be found here (
and I can confirm it worked :-) And that lead me to request the following :
> I would be very very great full if this could be included in nutch 0.9 as I am trying
to eliminate my python based crawler which post documents to solr. As I am in the corporate
enviornment I can't install trunk version in the production enviornment thus I am asking this
to be included in 0.9 release. I hope my wish would be granted.
> I look forward to get some feedback.
> Thank you.

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