What is Kotlin

Kotlin is a modern Java alternative programming language. Kotlin originally was developed by JetBrains, the company behind IntelliJ IDEA, in 2010, and has been open source...

Serverless API on AWS in 10 minutes

Amazon Web Services (AWS) allows you to quickly prototyping simple web applications. For example, to write a set of APIs for a simple mobile...

Looping Through a Map in Java

If you need to merge or add values to existing map, or may be perform some other operations for entire map you can use...

What is Apache Kafka

What is Kafka? Apache Kafka is a distributed and robust queue that can handle high volume data and enables you to pass messages from one...

What is Redis

Redis is NoSQL key-value in-memory distributed data store. It can be used as super-fast database, cache or message broker. Redis supports data structures such as...
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Configuring and Running Redis Cluster on Linux

Redis Cluster was released on April 1st, 2015. Since then Redis Cluster is the preferred way to get automatic sharding and high availability. In this...

Java REST Client Get Cookie From Server Response

Sometimes in order to be able to perform some actions via REST API server wants the client to be logged in. It may be...

Get list of files and folders from specific Amazon S3 directory

Every item stored in Amazon S3 is object, not file, not folder, but object. This often confuses new programmers, because they used to deal...