Author: Narayan Kumar

Introduction to the Trade Life Cycle

Hello folks, in this blog we will learn about trade life cycle. So before going into detail, one genuine question comes to mind is What is Trade life cycle? In the financial market, “trade” means to buy and/or sell securities/financial products. To explain it further, a trade is the conversion of an order placed on the exchange which results in pay-in and pay-out of funds and Continue Reading

Introduction to FIX protocol for Trading

The Financial Information eXchange(FIX) protocol is an electronic communications protocol initiated in 1992 for international real-time exchange of information related to the securities transactions and markets. It was initiated by a group of institutions interested in streamlining their trading processes. These firms believed that they, and the industry as a whole, could benefit from efficiencies derived through the creation of a standard for the electronic Continue Reading

Twitter’s tweets analysis using Lambda Architecture

Hello Folks, In this blog i will explain  twitter’s tweets analysis with lambda architecture. So first we need to understand  what is lambda architecture,about its component and usage. According to Wikipedia, Lambda architecture is a data processing architecture designed to handle massive quantities of data by taking advantage of both batch and stream processing methods. Now let us see  lambda architecture components and its detail.

Lambda Architecture with Spark

Hello folks, Knoldus  organized a knolx session on the topic : Lambda Architecture with Spark. The presentation covers lambda architecture and implementation with spark.In the presentaion we will discuss components of lambda architecure like batch layer,speed layer and serving layer.We will also discuss it’s advantages and benefits with spark. You can watch the video of presentation : Here you can check slide :   Thanks !!

Integrate JWT with Akka HTTP

In this article we will discuss about , how to implement  authentication or authorization in Akka HTTP routes using JWT . As we know Akka HTTP is full implementation of  server  and client side HTTP stack on top Akka actor and Akka stream . Now Let’s  we  talk about JWT. what is JWT ? JSON Web Token (JWT) is an open standard (RFC 7519) that defines Continue Reading

Knolx: Query DSL in Elasticsearch

Query DSL in Elasticsearch is a way to perform query on elasticsearch cluster.It is rich flexible query language.We can define queries of elasticsearch in JSON format.In this presentation we will see type of query dsl and its usage.

How to build secure Web Application

We all use web applications everyday whether we consciously know it or not. That is, all of us who browse the web. Now a days we have seen a significant surge in the amount of web application specific vulnerabilities that are disclosed to the public. No web application technology has shown itself invulnerable, and discoveries are made every day that affect both owners and users security and privacy. Security Continue Reading

Working with Nested Aggregation of Elasticsearch

First of all we need to understand aggregation in ElasticSearch.In Elasticsearch an aggregation can be seen as a unit of work that builds analytic information over a set of documents.It is a powerful tool for build complex summaries of the data. There are many different types of aggregations, each with its own purpose and output. To better understand these types, it is often easier to break Continue Reading

Elasticsearch: How to paginate over selected data in elasticsearch with scala using Scroll API of elasticsearch.

Elasticsearch is  real-time,distributed,full-text search analytics engine.It is built on top of Apache Lucene™.You can read it more on their website. It provides a distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License. Elasticsearch is the second most popular enterprise search engine. In Continue Reading

Elasticsearch: CURD Operations and sorting documents by time stamp with scala using java api of elastic search

Elasticsearch is an open-source search engine built on top of Apache Lucene™, a full-text search-engine library. You can read it more on their website. Elasticsearch is also written in Java and uses Lucene internally for all of its indexing and searching, but it aims to make full-text search easy by hiding the complexities of Lucene behind a simple, coherent, RESTful API. In this post, we Continue Reading

Knolx Session: Role of FSM in Akka

Here I am going to explain what is FSM , why we should use FSM And features of FSM. I am going to explain FSM using live example.

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