How to find Java API equivalents for Elasticearch curl + json examples
I use the Java API to interact with Elasticsearch, but generally most of the documentation and examples use raw curl + javascript / json, leaving me wondering how to translate this into the Java API equivalent.
So I'm wondering if the Elasticearch Java Client API can somehow drop the "native" json when needed. Obviously, I could create my own HttpClient and do a curl call in Java, but before doing that, I wondered if there is something more elegant built into Elasticsearch?
UPDATE: I am finally tired of Elasticsearch for this reason and many others. I switched to Solr and was very pleased - delivered an awesome out-of-the-box app on time that was solid and super-performing! Solr has a great java client, great docs, super performance and versatile features, and a completely free GUI monitoring / troubleshooting tool. For now, I will stick with Solr.
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It depends on the Java API in question, but in most cases the answer is freely yes:
Find the source(String)
method in the appropriate one ActionRequest
(or ActionRequestBuilder
which will usually call it setSource
).
For example, if you want to send a JSON request related to SearchRequest
, you can do the following:
SearchRequest request =
Requests.searchRequest("my-index1", "my-index2")
.types("my-type1", "my-type2")
.source("{\"query\":{\"match\":{\"user\":\"xyz\"}}}");
SearchResponse response = client.search(request).actionGet();
While this is certainly handy, it is probably best used for debugging rather than production code.
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In elasticsearch java api doc they provide a minimal doc. Pass test cases on gystub elasticsearch account. They covered all elasticsearch functionality as test cases.
https://github.com/elasticsearch/elasticsearch/tree/master/src/test/java/org/elasticsearch .
It would be helpful
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You should take a look at Spring Data Elasticsearch: https://github.com/spring-projects/spring-data-elasticsearch There you can use ElasticsearchRepository and hence create your own repository and use @Query annotation.
public interface CustomRepository extends ElasticsearchCrudRepository<CustomEntity, Long> {
@Query("{\"match_all\": {}}")
List<CustomEntity> findAllPersons();
// prefix Query
@Query("{\"bool\" : {\"should\" : [{\"prefix\" : {\"lastName\" : \"?0\"}}, {\"prefix\" : {\"firstName\" : \"?0\"}}]}}")
List<CustomEntity> findByLastNameOrFirstNameStartsWith(String prefix);
}
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