Niko Strongioglou

Software Engineer

Dryad

Development Language

Java 1.8

Technology Stack

  • Spring/Spring Boot/Spring JPA
  • Apache Kafka
  • Zookeeper
  • RabbitMQ
  • Protocol Buffers
  • Elasticsearch
  • Redis
  • Hibernate
  • PostgreSQL
  • Docker

Brief Description

Dryad is a modular application of distributed architecture. This engineering approach enables the components to provide high availability without cutting down on performance requirements. It is composed of 9 modules whose communication is possible through both their :

  • Messaging APIs (AMQP messages containing a byteload of Google's Protocol Buffers flowing through a RabbitMQ message bus) and their
  • REST APIs
This kind of architecture renders the application language agnostic (the entire infrastructure can end up consisting of a polyglot environment), as far as the implementation of the components is concerned. In order to eliminate any compatibility matrices and clearly separate our concerns we introduced Docker and containerization.

Dryad resides on both SQL(PostgreSQL) and NoSQL(Elasticsearch) data bases for persistence and querying. Due to the data galore Dryad produces, the Kafka integration platform was employed in order to temporarily retain data before streaming them to their corresponding reporting data bases and warehouses hosted by a Hadoop deployment.