Update By Query in Elasticsearch using Java

问题:

I’m currently using Elasticsearch V2.3.1. I want to use the following Elasticsearch query in Java.

POST /twitter/_update_by_query {   "script": {     "inline": "ctx._source.List = [‘Item 1’,’Item 2’]”   },   "query": {     "term": {       "user": "kimchy"     }   } } 

The above query searches for “user” named “kimchy” and updates the “List” field with given values. This query updates multiple documents at the same time. I read about the Update API for Java here https://www.elastic.co/guide/en/elasticsearch/client/java-api/2.3/java-docs-update.html but couldn’t find what I was looking for. The Update API for Java only talks about updating single document at a time. Is there any way to update multiple documents? Sorry if I’m missing something obvious. Thank you for your time.

Update:

I tried the below Java Code:

Client client = TransportClient.builder().addPlugin(ReindexPlugin.class)     .build().addTransportAddress(new InetSocketTransportAddress(         InetAddress.getByName("127.0.0.1"), 9300));  UpdateByQueryRequestBuilder ubqrb = UpdateByQueryAction.INSTANCE     .newRequestBuilder(client);  Script script = new Script("ctx._source.List = [\"Item 1\",\"Item 2\"]");  //termQuery is not recognised by the program BulkIndexByScrollResponse r = ubqrb.source("twitter").script(script)     .filter(termQuery("user", "kimchy")).execute().get(); 

So I edited the Java Program as above and the termQuery is not identified by Java. May I know what I'm doing wrong here? Thanks.

回答1:

As of ES 2.3, the update by query feature is available as the REST endpoint _update_by_query but nor for Java clients. In order to call this endpoint from your Java client code, you need to include the reindex module in your pom.xml, like this

org.elasticsearch.modulereindex2.3.2

Then you need to include this module when building your client:

clientBuilder.addPlugin(ReindexPlugin.class); 

Finally you can call it like this:

UpdateByQueryRequestBuilder ubqrb = UpdateByQueryAction.INSTANCE.newRequestBuilder(client);  Script script = new Script("ctx._source.List = [\"Item 1\",\"Item 2\"]");  BulkIndexByScrollResponse r = ubqrb.source("twitter")     .script(script)     .filter(termQuery("user", "kimchy"))     .get(); 

UPDATE

If you need to specify the type(s) the update should focus on, you can do so:

ubqrb.source("twitter").source().setTypes("type1"); BulkIndexByScrollResponse r = ubqrb.script(script)     .filter(termQuery("user", "kimchy"))     .get(); 

文章来源: Update By Query in Elasticsearch using Java