We are in the era of microservices. One of the advantages of microservices architecture is faster time to market. Development can be split into smaller parts, hence can be developed in parallel. Most of the time microservices communication is done by REST API. With that being said, a question arises…

When there is a problem in an application, especially in production the first place we check are logs. Usually, we have tons of logs and this is good because we have a lot of information that can help us. But on another hand having a large volume of information could be challenging to find what is required. LogQL is a tool that can help us find necessary information from a large volume of logs. This tutorial will help you to learn how to use LogQL.

Creating an application is fun until it goes to production. When a problem in production occurs the live-saving tool for a developer are logs of an application. Logs help find the problem, hence helping solve it. One of the best platforms for managing logs is Grafana. This tutorial will demonstrate Grafana in action. — The goal of this tutorial is to explain how we can collect logs from an application and searched it if needed.

AWS has a service called DocumentDB. This is a managed NoSQL database with MongoDB compatibility. Only with a couple of clicks, one can easily set up a cluster. This tutorial is about how to connect the SpringBoot application running on the local machine with DocumentDB. — As I previously mentioned it is very easy and fast to create a DocumentDB cluster. But on the other hand, connecting to it outside the AWS cloud is a tedious task. …

Nowadays applications work with large amounts of data and at the same time have to be fast and responsive, resilient, and highly available. A MongoDB replica set was made to solve these problems. This tutorial will demonstrate how to connect the MongoDB database with the Spring Boot application. — MongoDB replica set configuration To create a MongoDB replica set locally I will use a Dokcer and Docker compose, because it is a very convenient way that does not require actual installation of the MongoDB on the PC. The complete guide on how to create a MongoDB replica set locally can be found below:

Lucene is a powerful Java library that lets you add a search to the application. Two of the most popular search engines Elasticsearch and Apache Solr are built on top of it. Hence understanding well internals of Lucene will make it easy to work with popular search engines. — Lucene is an open-source, scalable, high-performance search storage engine, that has a small memory footprint. In short, it takes a document and indexes it, and returns it if asked to search.

I'm a backend developer, and I heavily use Postman when I code. There is one Postman trick that I want to share with you that will speed up your development. — Most of the APIs nowadays use JSON format for body requests. And the JSON doesn't allow comments like this//… or /*…*/. While developing one may need to comment out some parts of the request or add some kind of description to fields or the entire request.

Guice is a lightweight Java framework for handling dependency injection. It makes code modular, loosely coupled, and easy to develop, debug, maintain, and test. It even won the 18th Jolt Award for best Library, Framework, or Component. — The best approach to learning something is using practical examples. Hence this tutorial will be based on a simple project. The code will be pushed to a GitHub repository and the link will be presented at the end of this tutorial. …

Apache Cassandra is an open-source, distributed, peer-to-peer, NoSQL, column-oriented, scalable, and high-availability database. This tutorial is about this database’s internals, data types, and query language, including a local setup. — Look from the perspective of a relational databases Relational databases are the most popular, so every developer is familiar with at least one such as MySQL, Postgres, Oracle, and SQL Server. So naturally, when we try to learn new stuff we tend to relate it to something we already know. …