Elasticsearch with spring boot when using index query return nullPointerExciption - spring-boot

Question

I am using Elasticsearch with spring boot. A post request returns a null pointer exception, because index query is null value doesn't have index name or any things.
Look at my code
Service :
public List<Product> createProducts() {
List<Product>productList = new ArrayList<>();
for (Integer i = 0; i < 200; i++)
{
Product product = new Product();
product.setId(Long.parseLong(i.toString()));
product.setProductName(generateName());
product.setProductPrice(generatePrice());
product.setCategory(generateCategory());
if(!product.validation().equals(""))
{
throw new BadRequestAlertException(product.validation(),"Product","check input");
}
IndexQuery indexQuery=new IndexQueryBuilder().withId(i.toString()).build(); //return null
elasticsearchOperations.index(indexQuery); // here is error becouse index is null
productList.add(product);
}
return productList;
}
And this is the entity:
#JsonInclude(value = JsonInclude.Include.NON_NULL)
#Document(indexName = "product",type = "product")
public class Product implements Serializable {
private static final long serialVersionUID = 6320548148250372657L;
#Id
private Long id;
#Field(type = FieldType.Text)
private String productName;
#Field(type = FieldType.Text)
private String category;
#Field(type = FieldType.Double)
private Double productPrice;
This is the repostory:
public interface ProductSearchRepostory extends ElasticsearchRepository<Product,Long> {
List<Product> findByProductName(String name);
List<Product> findByCategory(String category);
}

Answer 1

You need to let the elasticsearchOperations.index method know which index to save the data in.
As per the documentation present for Spring Data Elasticsearch, in the newer versions, the index method expects an IndexCoordinates object which tells the client which index to put the data in. For the older versions ( < 4.0), this is inferred by the client based on the entity object that is being indexed.
In your code, can you please try to pass the entity while building the IndexQuery. Something like,
new IndexQueryBuilder().withId(i.toString()).withObject(product).build()