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Alexander Eleseev

DZone Core CORE

Full Stack Developer at First Line Software

Praha, CZ

Joined Jul 2020

https://www.linkedin.com/in/alexander-eliseev-705448146/

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Reputation: 415
Pageviews: 82.6K
Articles: 12
Comments: 0

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Building a Distributed Multi-Language Data Science System
The starter consists of hexagonal microservices (MERN monorepo, Spring Boot Camel, Flask), Gateway, Eureka, that communicate via REST, GraphQL, gRPC, and AMQP.
March 18, 2025
· 3,313 Views · 3 Likes
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On Some Aspects of Big Data Processing in Apache Spark, Part 4: Versatile JSON and YAML Parsers
In this post, I present versatile JSON and YAML parsers for a Spark application.
August 23, 2022
· 5,892 Views · 2 Likes
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On Some Aspects of Big Data Processing in Apache Spark, Part 3: How To Deal With Malformed Data?
In this post I present some solutions on how to deal with malformed date/time data, and on how to set a default value for malformed data.
August 23, 2022
· 5,160 Views · 2 Likes
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On Some Aspects of Big Data Processing in Apache Spark, Part 2: Useful Design Patterns
In this post, learn to construct Spark applications in a maintainable and upgradable way, where at the same time "task not serializable" exceptions are avoided.
August 16, 2022
· 8,841 Views · 5 Likes
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On Some Aspects of Big Data Processing in Apache Spark, Part 1: Serialization
In this post, review the basics of how Apache Spark runs its jobs and discover how to avoid serialization errors.
August 11, 2022
· 6,368 Views · 2 Likes
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A Robust Distributed Payment Network With Enchanted Audit Functionality - Part 2: Spring Boot, Axon, and Implementation
In this post, I demonstrate how to build a distributed payment network system with enchanted audit functionality by means of Spring Boot, Spring Cloud, Axon, Neo4j.
February 8, 2022
· 4,160 Views · 3 Likes
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A Robust Distributed Payment Network With Enchanted Audit Functionality - Part 1: Concepts
In this post, I'll review CQRS, event sourcing, graph database concepts necessary to build a distributed robust payment network system with enchanted audit functionality.
February 7, 2022
· 2,929 Views · 3 Likes
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How to Implement Two-Factor Authentication in A Spring Boot OAuth Server? Part 2: Under the Hood
This post continues Part 1 and demonstrates how the Spring Boot OAuth authentication server processes a token request internally.
September 14, 2021
· 6,486 Views · 2 Likes
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How to Implement Two-Factor Authentication in a Spring Boot OAuth Server? Part 1: Configuration
In this post, I demonstrate how to configure a two-factor authentication functionality for a Spring Boot 2.5 OAuth JWT server, that is a part of a larger Spring Cloud system.
September 14, 2021
· 9,406 Views · 1 Like
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CRUD Operations on Deeply Nested Comments: Scalable Spring Boot and Spring Data approach
In this post, I present CRUD operations on deeply nested comments, stored in a relational database via Spring Boot and Spring Data. The approach is scalable but uses only JPQL and very few pessimistic locks.
October 6, 2020
· 6,312 Views · 1 Like
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Data Structures and Indexing for Operations on Deeply Nested Comments
In this post I demonstrate a schema, an entity, a DTO, and a continuous fraction index, for JPQL-only CRUD operations on deeply nested comments in relational databases.
October 6, 2020
· 4,030 Views · 1 Like
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Recursive Angular Rendering of a Deeply Nested Travel Gallery
I present 3 approaches to recursively render a deeply nested travel gallery in Angular. The last shows how Angular change detection differs from React's.
August 31, 2020
· 12,916 Views · 2 Likes
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