In this tutorial, you will learn how recover from deserialization errors gracefully in your Kafka Consumer Spring Boot Microservice. You’ll see how to use specific settings to ensure that a single problematic message doesn’t disrupt your message processing. By the end, your consumer will be able to skip over errors and continue processing subsequent messages…
Read More Kafka Consumer: Handle Deserialization ErrorsIn this tutorial, I will guide you through the process of setting up a Kafka Consumer using the @Configuration class and the @Bean method. This approach offers more flexibility and control compared to using the application.properties file. Kafka consumer configuration can be achieved in two primary ways in a Spring Boot application: Using the application.properties…
Read More Kafka Consumer Configuration in the @Bean MethodIn this tutorial, I will guide you through setting up a Kafka Consumer in a Spring Boot application. You will learn how to configure the consumer properties, create a listener class using the @KafkaListener annotation, and how to process messages with the @KafkaHandler annotation. Let’s start with the configuration. Kafka Consumer Configuration in application.properties In…
Read More Creating Kafka Consumer in Spring Boot MicroserviceIn this tutorial, you will learn how to use the @Bean configuration for the Kafka producer in a Spring Boot application. Introduction A Kafka producer is a client that sends messages to a Kafka topic, which is a logical name for a stream of records. A Kafka producer can specify various configuration properties to control…
Read More Apache Kafka Producer @Bean ConfigurationIn this tutorial, you will learn how to implement Kafka Producer in a Spring Boot Microservice. A Kafka Producer is an application that sends messages to a Kafka topic, which can be consumed by other microservices. You will use Spring for Apache Kafka dependency to configure and create a Kafka Producer in your Spring Boot…
Read More Kafka Producer in Spring Boot MicroserviceIn this tutorial, you will learn how to create your first Kafka cluster. You will learn how to start three Kafka servers in a cluster using KRaft mode. If you want to run just one server in a cluster, then read “Start Apache Kafka Server in KRaft mode” tutorial. Starting more than one server in…
Read More Kafka Cluster: How to Start 3 Kafka Servers in a ClusterKeeping sensitive data secure is essential, but it isn’t that easy in today’s world. If you are using the Spring Boot application and want to encrypt your credentials, such as DB passwords, server information, or personal data then the simplest way is to use Jasypt. What is Jasypt? Jasypt (Java Simplified Encryption) is a Java…
Read More Spring Boot Password Encryption Using JasyptIn this tutorial, you will learn how to generate a custom JSON Web Token(JWT) and how to add and validate custom JWT Claims using the io.jsonwebtoken library. The JWT token generated in this tutorial will be signed with a SecretKey, making it secure and tamper-proof. Also, this tutorial assumes you have prior knowledge of creating…
Read More Generate JWT. Add and Validate Custom Claims.In this tutorial, you will learn how to create a new Kafka Topic in a Spring Boot application. Kafka topics can also be created automatically when a new message is sent to them. However, in production environments, topic auto-creation is usually turned off. This is why creating Kafka topics before sending messages to them is considered…
Read More Creating Kafka Topic in Spring Boot ApplicationWhat is JUnit 5? JUnit 5 is actually a combination of three main elements. It’s a mix of JUnit Platform, JUnit Jupiter API, and JUnit Vintage API. Let’s break it down. JUnit Platform Think of JUnit 5 as having a solid foundation called the JUnit Platform. This platform is like the engine that gets your…
Read More What is JUnit 5? (+Video Tutorial)Environment variables are useful for configuring the behavior of an application without modifying its code. They are often used to store sensitive information such as passwords, API keys, or database credentials. However, passing environment variables to a Docker container can be tricky, especially if you want to keep them secure and avoid exposing them in…
Read More Passing Environment Variables to Docker ContainerIn this tutorial, I’m going to walk you through how to execute a JUnit 5 test case from a command-line terminal without the use of Maven or Gradle. If you’re just starting out with Java or JUnit, you’re in the right place. I’ll explain everything in detail, step-by-step, so you can follow along even if…
Read More Run JUnit 5 Tests from Command Line without Maven or GradleIn this tutorial, you will learn about Spring Bean Scopes, an important part of the Spring Framework. You will learn what they are, how they work, and when to use them. By the end, you’ll have a clear understanding of Spring Bean Scopes, helping you build better Spring applications. Introduction to Spring Beans In the…
Read More A Guide to Spring Bean ScopesIn this guide, I’ll show you how to create a Fat Jar with Spring Boot. Together, we’ll build a simple ‘UsersMicroservice’, then pack it into a Fat Jar. Don’t worry if you’re new, I’ll guide you step-by-step and answer your top questions along the way. Let’s get started! What is a Fat JAR? A Fat…
Read More Creating a Fat Jar App with Spring BootReactive Programming, a powerful paradigm in modern software development, revolutionizes the way we handle data and events. By embracing reactive principles, developers can build highly responsive and scalable applications. In this tutorial, we will explore the fundamentals of Reactive Programming, its benefits, common use cases, and delve into real-world examples to demonstrate its practical applications.…
Read More Introduction to Reactive Programming