ES Key Value

Node library to save key value pairs in ES just like redis.

Preface

In normal scenario, ES is used for documents saving, but for a different point of view it can also be used as key value pairs as like redis or some other DBs

Features

1. Converts Document saving to Key-Value Pair
2. Can work as fallback for redis if your redis is not running in cluster mode, even if in cluster mode can work as fallback
3. Behaves same as Redis

Getting started.

Install

npm install --save es-key-value

Usage

For now ttl is not supported, but will be added soon

1. Get Key

 
const Q = require('q');
const Sleep = require('sleep');
const EsKeyValue = require('es-key-value');
const Elasticsearch = require('elasticsearch');
let client = new Elasticsearch.Client({
    host: {
        host: '127.0.0.1',
        port: 9200
    },
    log: 'trace'
});
 
// 2nd Param is optional but its better if you provide
let keyValueClient = new EsKeyValue(client, {
    index: 'customindex',
    type: 'customtype',
    logger: console
});
 
new Q(undefined)
        .then(function(result) {
            return keyValueClient.init();
        })
        .then(function() {
            return keyValueClient.get('key123');
        })
        .then(function(result) {
            return Q.resolve();
        })
        .fail(function(error) {
            logger.error(error);
        });

1. Set Key With Value

 
const Q = require('q');
const Sleep = require('sleep');
const EsKeyValue = require('es-key-value');
const Elasticsearch = require('elasticsearch');
let client = new Elasticsearch.Client({
    host: {
        host: '127.0.0.1',
        port: 9200
    },
    log: 'trace'
});
 
// 2nd Param is optional but its better if you provide
let keyValueClient = new EsKeyValue(client, {
    index: 'customindex',
    type: 'customtype',
    logger: console
});
 
new Q(undefined)
        .then(function(result) {
            return keyValueClient.init();
        })
        .then(function() {
            return keyValueClient.set('key123', 21);
        })
        .then(function(result) {
            return Q.resolve();
        })
        .fail(function(error) {
            logger.error(error);
        });

Note

ES takes around 1 sec to index after write, so while using this library we should take that in consideration too. Read is pretty fast as ES search, but still it can not match Redis.

How to contribute

Have an idea? Found a bug? See how to contribute.

Have a problem? Come chat with us!

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Maintained by

Yogesh Yadav

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Where is this library used?

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License

MIT © Yogesh Yadav