Java, Spring Boot, Microservices, Cloud and DevOps Tutorials
I have been working with SpringBoot for many years, and over time, I have worked with many Spring Boot-based codebases. There are a few common mistakes that I observe in projects that use Spring Boot. So, I thought of writing down a few good practices that can be followed while using Spring Boot.
One of the challenges in microservices architecture is the ability to debug issues. A simple user action might trigger a chain of downstream microservice calls. It would be tedious to trace the logs related to a particular user action across microservices. In addition to that, we might want to track down why a certain microservice call is taking so much time. We can use Spring Cloud Sleuth to handle these kinds of issues.
In microservices architecture, there could be a number of API services and few UI components that are talking to APIs. As of now, many microservices based application still use monolithic front-ends where the entire UI is built as a single module. You may choose to go with micro-frontends where the UI is also decomposed into multiple microservice talking to APIs to get the relevant data. Instead of letting UI know about all our microservices details we can provide a unified proxy interface that will delegate the calls to various microservices based on URL pattern. In this post, we will learn how to create API Gateway using Spring Cloud Zuul Proxy.
In the microservices world, to fulfill a client request one microservice may need to talk to other microservices. We should minimize this kind of direct dependencies on other microservices but in some cases it is unavoidable. If a microservice is down or not functioning properly then the issue may cascade up to the upstream services. Netflix created Hystrix library implementing Circuit Breaker pattern to address these kinds of issues.
In the microservices world, Service Registry and Discovery plays an important role because we most likely run multiple instances of services, and we need a mechanism to call other services without hardcoding their hostnames or port numbers. In addition to that, in Cloud environments, service instances may come up and go down at any time. So we need some automatic service registration and discovery mechanism. Spring Cloud provides Service Registry and Discovery features, as usual, with multiple options. We can use Netflix Eureka or Consul for Service Registry and Discovery.
In MicroServices using Spring Boot & Spring Cloud – Part 1: Overview, we took a brief look at what microservices are and how we can use Spring Boot and Spring Cloud to build them.
In this post, we are going to learn:
Nowadays, “MicroServices” is the hot buzzword in software development, and many organizations prefer building their enterprise applications using a MicroServices architecture. In the Java community, Spring Boot is the most widely used framework for building both monoliths and microservices. I am planning to write a series of articles covering how to build microservices using Spring Boot and Spring Cloud.
Spring Boot is the most popular and widely used Java framework. This discussion of “Why is Spring Boot so popular?” occasionally comes up between me and my friends/colleagues. Also, I get emails from various people asking, “Spring is huge; how can I learn it quickly?”. In this post, I will try to answer these two questions.
RabbitMQ is one of the most popular message broker solutions and provides client libraries to be used from various programming languages, including Java, Scala, .NET, Go, Python, Ruby, PHP, etc. In this tutorial, we will learn how to use the RabbitMQ message broker to send and receive messages from a Spring Boot application. We will also look at how to send messages as JSON payloads and how to deal with errors using Dead Letter Queues (DLQ).
In web applications, user session management is very crucial for managing user state. In this article, we are going to learn about the approaches we have been following to manage user sessions in a clustered environment and how we can use Spring Session to implement it in a much simpler and more scalable way.