Save elasticsearch document field value in java variable

How can I save the the field value in a variable in Java.

  "took": 6,
  "timed_out": false,
  "_shards": {
    "total": 10,
    "successful": 10,
    "skipped": 0,
    "failed": 0
  "hits": {
    "total": 1776430,
    "max_score": 0,
    "hits": []
  "aggregations": {
    "num_prg_expenditure_avg": {
      "value": 721421.2185617918
    "expenditure_avg": {
      "value": 3876729.261930876

I need to access expenditure_avg and num_prg_expenditure_avg from above search result to store them in Java variable.

Which java client are you using?
How do you make that call?

I want to use both

  1. High Level Rest Client

  2. Low Level Rest Client.

  3. By High Level

    RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost",9200,"http")));
     	SearchRequest searchRequest = new SearchRequest("mis_monthly_allotment_expenditure","mis_work_prg_exp");
     	SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
     	SearchResponse searchResponse =;
  4. For Low Level Client

     String jasonString = "{\r\n" + 
     				"  \"aggs\": {\r\n" + 
     				"    \"expenditure_avg\": {\r\n" + 
     				"      \"avg\": {\r\n" + 
     				"        \"field\": \"expenditure\"\r\n" + 
     				"      }\r\n" + 
     				"    },\r\n" + 
     				"    \"num_prg_expenditure_avg\": {\r\n" + 
     				"      \"avg\": {\r\n" + 
     				"        \"field\": \"num_prg_expanditure\" \r\n" + 
     				"      }\r\n" + 
     				"    }\r\n" + 
     				"  }\r\n" + 
     	HttpEntity entity = new NStringEntity(jasonString, ContentType.APPLICATION_JSON);
     	RestClient client = RestClient.builder(new HttpHost("localhost",9200,"http")).build();
     	Response response = client.performRequest("POST","mis_monthly_allotment_expenditure,mis_work_prg_exp/_search",paramMap,entity);

And the output is:

  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 10,
    "successful" : 10,
    "skipped" : 0,
    "failed" : 0
  "hits" : {
    "total" : 1776430,
    "max_score" : 0.0,
    "hits" : [ ]
  "aggregations" : {
    "num_prg_expenditure_avg" : {
      "value" : 721421.2185617918
    "expenditure_avg" : {
      "value" : 3876729.261930876

and how can I use pretty in High Level Client?

I'm not sure to understand what your problem is.

The only question I can see is:

and how can I use pretty in High Level Client?

The High Level client gives you back Java objects, not Strings. What do you want to do exactly?

The SearchResponse object gives you access to the aggregations.

How can i use SearchResponse instead of Response

Response response = client.performRequest("POST","mis_monthly_allotment_expenditure,mis_work_prg_exp/_search",paramMap,entity);

Here, Entity has my query in jsonString.

With the RestHighLevelClient as you already shown.

How should i alter my Response to SearchResponse??

I did not mean that but to use:

RestHighLevelClient client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost",9200,"http")));
SearchRequest sr = new SearchRequest("index");
SearchSourceBuilder ssb = new SearchSourceBuilder();

// Add whatever here

SearchResponse response =;

I have already implemented these!
But the question remains as how do i access the field values by any methods??

Sorry I am a student and new to elasticsearch.:grin:

So this gives you back a SearchResponse object right?

So then just do that:

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
TermsAggregationBuilder aggregation = AggregationBuilders.terms("by_company")

can you please explain what is "by_company"and "company.keyword"

by_company is the aggregation name you want to use. Can be whatever like expenditure_avg.
company.keyword is the field name you want to run the aggregation on. In your case, it can be expenditure.

So you can write something like:

SearchSourceBuilder ssb = new SearchSourceBuilder();
Aggregations aggregations = searchResponse.getAggregations();
    Terms byCompanyAggregation = aggregations.get("by_company"); 
    Bucket elasticBucket = byCompanyAggregation.getBucketByKey("Elastic"); 
    Avg averageAge = elasticBucket.getAggregations().get("average_age"); 
    double avg = averageAge.getValue();

so similarly here
by_company is expenditure_avg
Then what is Elastic ?? what does getBucketByKey specify?
and what would be average_key for my case.

As I cannot get .getValue()

I think I gave an example.

May be you don't understand what aggregations are in general ?

May be read this then?

I do.

Can you share your sample code as how to store the field value from elasticsearch query to a java variable.
Maybe that can help.

how to store the field value from elasticsearch query to a java variable.

If you meant reading a SearchResponse object, I already pasted a link previously: Search API | Java REST Client [7.17] | Elastic

If you can't make it work, create a simple Java JUnit test method which does everything (delete index, create index, put document, search) and then we can start from there. But I don't understand what you don't understand.

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.