I am not able to find any support for query templates in Elastic Search Java REST Client (High Level). Does it exists? Or is there a way to use REST client with query templates?
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I have to implement elastic search with my spring boot application. I have to design the architecture in such a way that we have to cluster elastic search so that if one instance of elastic search is down then another instance of elastic search takes the handover to serve data.
My company has Elastic Search behind the REST endpoints /search and /count, but it hides the cluster nodes from access.
I could call those REST endpoints through Native DSL queries, but I don't want to create a lot of the boilerplate code that comes with creating queries and mapping responses, which is why I would like to use Spring Data Elastic Search to do a lot of that for me. I would like to know if it is possible to connect to Spring Data Elastic Search to an ES instance through a proxy REST endpoint, but based on the docs, it seems like Spring Data ES can only connect to the ES Instance. Has anyone else had this kind of need?
Spring Data Elasticsearch operates upon an Elasticsearch client that is connected to a single Elasticsearch node or a cluster.
You link to the documentation, Chapter Elasticsearch Clients. In this chapter, in the section Client Configuration you find the description how to configure a proxy:
ClientConfiguration clientConfiguration = ClientConfiguration.builder()
.connectedTo("localhost:9200", "localhost:9291")
.withProxy("localhost:8888")
.build();
I have a JSON file and I want to know how to index it to the elasticsearch in spring boot
You could use the Spring Data Elasticsearch component and index the JSON using the bulk API.
You have to convert the JSON into a relevant Java Object using libraries like GSon.
It uses the Elasticsearch High-level REST Client and the _bulk underlying.
I'm new in elasticsearch. we have a project with a lot of user interaction. Backend of the project is ASP.NET MVC and frontend is Angularjs. Backend and Frontend communicate with WEB API.
We use SQL Server for data storage and we'll use elasticsearch for Search Engine and retrieving data from server.
Elasticsearch can work upon of Nest and javascript API, is there any difference in performance between Nest and JS API (Specially in very big and complicated queries)?
NEST, the high level Elasticsearch .NET client, uses Elasticsearch's json REST API through Elasticsearch.Net, the low level .NET client, and exposes all of the endpoints with strong types, using JSON.Net for serialization.
Elasticsearch.Net itself does not expose all endpoints with strong types but can work with string, byte[], object, and string, byte[] and object collections. It uses a simple json serializer to handle serialization so has no dependencies on any other serialization library.
NEST aims to be a fast client that "just works" for any scenario in which you want to use Elasticsearch. If you're using a limited subset of the API, you may be able to improve serialization with custom serializers using something like JIL, and, if the approach is generic, we'd love to know to see if it could be rolled into NEST. You can write your own json serializer by implementing IElasticsearchSerializer.
I have solr running at http://localhost:8983/solr/ . I have a Spring MVC app running at http://localhost:8080/login.jsp .
I would like to be able to Query only the solr data from my spring app. What is the best way to go about this? Does someone have a simple running example?
Integrate Solr with Spring using SolrJ.
SolrJ is the Solr Java Client Library which will allow you to query Solr and get back the results in java objects which you can use as Model objects with Spring MVC.
You can easily create a Repository which interacts with Solr using Solrj.
Also, secure the Solr Collections so that no one can access Solr from direct URL without authentication.
The Solrj Client with the Spring MVC app can query SOlr with Authentication.
You can also use spring-data-solr to do so. It should integrate quite nicely into an existing spring MVC application.