Elasticsearch: Constructing mappings for Java Client

Question

In my elasticsearch.yml file am trying to implement some mapping where one field belonging to one type is indexed using a different analyzer to the rest.

At present the yaml file has the following structure:

index:
  bookshelf:
    types:
      book:
        mappings:
          title: {analyzer: customAnalyzer}
  analysis:
    analyzer:
      # set standard analyzer with no stop words as the default
      default:
        type: standard
        stopwords: _none_
      # set custom analyser to provide relative search results
      customAnalyzer:
        type: custom
        tokenizer: nGramTokenizer
        filter: [lowercase,stopWordsFilter,asciifolding]
    tokenizer:
      nGramTokenizer:
        type: nGram
        min_gram: 1
        max_gram: 2
    filter:
      nGramFilter:
        type: nGram
        min_gram: 1
        max_gram: 2
      stopWordsFilter:
        type: stop
        stopwords: _none_

This does not apply the custom analyzer to the title field, so I was hoping someone may be able to point me in the right direction for applying custom analyzers to individual fields?

Did you figure out why your customAnalyzer was not being applied to the title field? I can't sense out of the accepted answer — Brian Webster
– Brian Webster, Commented Jan 16, 2013 at 14:13
@BrianWebster no, I wasn't able to get it to work. I put it in a backlog with the intention of coming back to it. If you do succeed in implementing the custom analyzer then please add your solution to this question. Thanks — My Head Hurts
– My Head Hurts, Commented Jan 17, 2013 at 8:01
Will do. I'm still new in the process. However, I wonder if there is a possibility that it is being applied and it's just hard to detect? For example, I do not believe ES has a way to view tokens (the result of an analyzer being applied). Could you list the test case that you are using? — Brian Webster
– Brian Webster, Commented Jan 17, 2013 at 12:56

Brian Webster · Accepted Answer · 2013-01-16 14:10:52Z

6

I answered this in the ml:

If you are using Java you don't have to use an yml file. You can, but you don't have to.

If you are using Spring, you can have a look at the ES spring factory project: https://github.com/dadoonet/spring-elasticsearch

If not, there is different ways of creating index and mappings in Java:

You can have a look here to see how I'm doing this by reading a json mapping file: https://github.com/dadoonet/spring-elasticsearch/blob/master/src/main/java/fr/pilato/spring/elasticsearch/ElasticsearchAbstractClientFactoryBean.java#L616
You can also use XContent objects provided by ES to build your mappings in Java: https://github.com/dadoonet/rssriver/blob/master/src/test/java/org/elasticsearch/river/rss/RssRiverTest.java#L14
Using this object is described here: https://github.com/dadoonet/rssriver/blob/master/src/test/java/org/elasticsearch/river/rss/AbstractRssRiverTest.java#L98

Adding the mapping as follows:

node .client() .admin () .indices()
 .preparePutMapping ("yourindex" )
 .setType ( "yourtype" )
 .setSource ( mapping ())
 .execute() .actionGet ();

I hope this could help you

edited Jan 16, 2013 at 14:10

Brian Webster

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answered Oct 4, 2012 at 15:38

dadoonet

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1 Comment

My Head Hurts Over a year ago

Thanks for adding this answer here as well David - I like to be able to up-vote helpful things :) I am still playing with this and trying to get it to work for me.

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