ElasticSearch with Express framework

Question

I want to built a application and a api which will mainly retrieve a resource, Now I have heard a lot about Nodejs and ElasticSearch and I know little bit Nodejs and Express framework. But I don't know how will I integrated ElasticSearch with Express framework.

Answer 1

• 1st download ElasticSearch
• Inside your project / Express framework directory download ElasticSearch express driver using npm install elasticsearch --save
• Run ElasticSearch Instance, By default it runs on the port 9200

• To use that module, simply create a client instance

  var elasticsearch = require('elasticsearch');
  var client = elasticsearch.Client({
    host: 'localhost:9200'
  });
  
  client.search({
    index: 'books',
    type: 'book',
    body: {
      query: {
        multi_match: {
          query: 'express js',
          fields: ['title', 'description']
        }
      }
    }
  }).then(function(response) {
    var hits = response.hits.hits;
  }).catch(function (error) {
    console.trace(error.message);
  });
  

• Helpfull Link https://blog.raananweber.com/2015/11/24/simple-autocomplete-with-elasticsearch-and-node-js/

Answer 2

First, of course you need a Elasticsearch instance running.

Then, you should use official client library for Node.js: https://github.com/elastic/elasticsearch-js

To use that module, simply create a client instance

var elasticsearch = require('elasticsearch');
var client = new elasticsearch.Client({
  host: '<your_instance_ip>:9200',
  log: 'trace'
});

And then push some data to it via client.send and search for it using client.search functions.