A simple Spring Boot (Java) app which demonstrates Apache Kafka's producer and consumer APIs.

A Spring (Java) project with the spring-kafka library added. This project could be used as a POC for the various features provided by the library.

A simple Spring Boot command line runner application to illustrate the use of DynamoDB.

A set of projects designed around the field of Data Science. Checkout https://blog.contactsunny.com/category/data-science for more.

This is a simple Java program to illustrate the use of User Defined Functions (UDFs) in Apache SparkSql.

A simple Spring Boot application to demonstrate how to upload and download files.

A simple Kafka Producer project using Spring Boot (in Java). The producer object is created using the native Java Kafka library. The properties for Zookeeper and Kafka are created using an instance of the java.util.Properties class.

A simple Java POC to read and write Microsoft Office Excel files (.xls, .xlsx).

This is a simple Spring Boot POC in which we try to understand how to use MongoDB cascading features provided by Spring Boot, to encrypt data before saving to MongoDB and decrypting it after fetching from MongoDB.

A POC project to connect Apache Spark to MongoDB

This is a simple Java program to illustrate how you can read input datasets from S3 files and write your result datasets to S3 files.

A simple Maven dependency module which integrates Kafka consumer and producer to your application.

A POC written in Java using the Spring framework, which uses Apache Spark to read a file from Amazon S3 FS and counts the number of lines in the file.