How to use elasticsearch search query into springboot - rest

Question

GET products/_search
{
"query": {
"multi_match" : {
"query": "novel",
"fields": [ "description", "name","id" ,"price"]
}
}
}
This query i want to fire on my spring boot application to search keyword searching
This is my conreoller class which function i will use
package com.pixelTrice.elastic.search;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.io.IOException;
import java.util.List;
#RestController
public class ElasticSearchController {
#Autowired
private ElasticSearchQuery elasticSearchQuery;
#PostMapping("/createOrUpdateDocument")
public ResponseEntity<Object> createOrUpdateDocument(#RequestBody Product product) throws IOException {
String response = elasticSearchQuery.createOrUpdateDocument(product);
return new ResponseEntity<>(response, HttpStatus.OK);
}
#GetMapping("/getDocument")
public ResponseEntity<Object> getDocumentById(#RequestParam String productId) throws IOException {
Product product = elasticSearchQuery.getDocumentById(productId);
return new ResponseEntity<>(product, HttpStatus.OK);
}
#DeleteMapping("/deleteDocument")
public ResponseEntity<Object> deleteDocumentById(#RequestParam String productId) throws IOException {
String response = elasticSearchQuery.deleteDocumentById(productId);
return new ResponseEntity<>(response, HttpStatus.OK);
}
#GetMapping("/searchDocument")
public ResponseEntity<Object> searchAllDocument() throws IOException {
List<Product> products = elasticSearchQuery.searchAllDocuments();
return new ResponseEntity<>(products, HttpStatus.OK);
}
#GetMapping("/searching")
public ResponseEntity<Object> searching() throws IOException{
List<Product> products = elasticSearchQuery.searching();
return new ResponseEntity<>(products,HttpStatus.OK);
}
}
This is my query class as I want to to write java query:
package com.pixelTrice.elastic.search;
import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch.core.*;
import co.elastic.clients.elasticsearch.core.search.Hit;
import org.apache.lucene.queryparser.flexible.core.builders.QueryBuilder;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
import org.springframework.stereotype.Repository;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
#Repository
public class ElasticSearchQuery {
#Autowired
private ElasticsearchClient elasticsearchClient;
private final String indexName = "products";
public String createOrUpdateDocument(Product product) throws IOException {
IndexResponse response = elasticsearchClient.index(i -> i
.index(indexName)
.id(product.getId())
.document(product)
);
if (response.result().name().equals("Created")) {
return new StringBuilder("Document has been successfully created.").toString();
} else if (response.result().name().equals("Updated")) {
return new StringBuilder("Document has been successfully updated.").toString();
}
return new StringBuilder("Error while performing the operation.").toString();
}
public Product getDocumentById(String productId) throws IOException {
Product product = null;
GetResponse<Product> response = elasticsearchClient.get(g -> g
.index(indexName)
.id(productId),
Product.class
);
if (response.found()) {
product = response.source();
System.out.println("Product name " + product.getName());
} else {
System.out.println("Product not found");
}
return product;
}
public String deleteDocumentById(String productId) throws IOException {
DeleteRequest request = DeleteRequest.of(d -> d.index(indexName).id(productId));
DeleteResponse deleteResponse = elasticsearchClient.delete(request);
if (Objects.nonNull(deleteResponse.result()) && !deleteResponse.result().name().equals("NotFound")) {
return new StringBuilder("Product with id " + deleteResponse.id() + " has been deleted.").toString();
}
System.out.println("Product not found");
return new StringBuilder("Product with id " + deleteResponse.id() + " does not exist.").toString();
}
public List<Product> searchAllDocuments() throws IOException {
SearchRequest searchRequest = SearchRequest.of(s -> s.index(indexName));
SearchResponse searchResponse = elasticsearchClient.search(searchRequest, Product.class);
List<Hit> hits = searchResponse.hits().hits();
List<Product> products = new ArrayList<>();
for (Hit object : hits) {
System.out.print(((Product) object.source()));
products.add((Product) object.source());
}
return products;
}
public List<Product> searching() throws IOException{
SearchRequest searchRequest = new SearchRequest();
searchRequest.indices(indexName);
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
QueryBuilder cluase0 = QueryBuilders.multiMatchQuery(queryString,
"name",
"id",
"description",
"price");
MultiMatchQueryBuilder multiMatchQueryBuilder1 = new MultiMatchQueryBuilder(queryString, "firstName", "lastName",
"password", "emailId", "userId", "mobileNumber");
multiMatchQueryBuilder1.operator(Operator.AND);
searchSourceBuilder.query(multiMatchQueryBuilder1);
}
GET products/_search
{
"query": {
"multi_match" : {
"query": "novel",
"fields": [ "description", "name","id" ,"price"]
}
}
}
i tried this on kibana and get my desired keyword search on "novel" it showed me my desired result now i want to convert this into java api but couldnot think how can i write its sysntax on java

Answer 1

SearchRequest searchRequest = SearchRequest.of(s -> s.index("products").from(from).size(size).query(q -> q.multiMatch(
t -> t .fields("description","name").query(text)))
);
SearchResponse searchResponse = elasticsearchClient.search(searchRequest, Product.class);
List<Hit> hits = searchResponse.hits().hits();
List<Product> products = new ArrayList<>();
for(Hit object : hits){
products.add(p);
}