Spring Cloud

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In a microservices architecture, it is common to have multiple services communicating with each other over the network. This distributed nature of the architecture can make it challenging to diagnose and debug issues when they arise. To address this problem, developers often use monitoring(Micrometer) and tracing tools(Zipkin) to track the flow of requests between microservices.…

Read More Micrometer and Zipkin: How to Trace HTTP Requests in Spring Boot 3
by 0 comments on "How to use Project Lombok in Spring Boot"

This tutorial will teach you how to use project Lombok in the Spring Boot application. Overview No doubt Java is a wonderful language, but one of the drawbacks of Java is its verbose nature. This makes it fairly complicated for everyday tasks such as composing a simple POJO object. For example, constructing of methods like Getters(), Setters(),…

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by 0 comments on "Start Spring Boot App on a Random Port Number"

This tutorial will teach you how to start your Spring Boot application on a random port number. Starting an application on a random port number is very helpful when you need to start multiple instances of the same Spring Boot application and then balance HTTP requests between the running instances. If you want to learn…

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Spring is a popular open-source Java-based framework for developing enterprise applications. It was first developed by Rod Johnson in 2003 and has since become one of the most widely used Java frameworks, with millions of downloads and numerous high-profile projects using it. Key Features Here are some key features of Spring Framework that make it…

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What is Spring Batch? Spring Batch is a lightweight, broad batch framework that builds upon the characteristics of the Spring Framework that enables the development of robust batch applications, which plays a vital role in the daily operations of enterprise systems. Spring Batch provides many reusable functions that are necessary for processing records with large…

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by 0 comments on "Create AWS Lambda Functions from Spring Cloud Functions"

This tutorial is about creating Lambda functions from Spring Cloud Functions. Spring Cloud Functions provide a way to implement the business logic via functions and decouple code development from the runtime target. Hence, the developer can focus solely on the implementation of logic. The developer need not worry about the target endpoint type, connectivity, integration,…

Read More Create AWS Lambda Functions from Spring Cloud Functions
by 0 comments on "Enforcing Resilience in Spring Boot with Resilience4J"

An important property of modern web apps is resilience. In simple terms, resilience refers to the ability of a system or feature to fail gracefully without impacting the entire system. In the context of web apps, we want to ensure that the entire system will not go down if a remote service, such as a…

Read More Enforcing Resilience in Spring Boot with Resilience4J
by 1 comment on "Spring Cloud Config Server and Config Client"

This tutorial will teach you how to create your own Spring Cloud Config Server and how to configure a Spring Boot Application to be a Spring Cloud Config Client. Spring Cloud Config Server Spring Cloud Config Server is a Spring Boot application. So to create our own Spring Cloud Config Server, we must first create…

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by 0 comments on "Spring Cloud API Gateway Global Filter Example"

This tutorial will teach you how to create a simple Spring Cloud API Gateway Global Pre-filter and Post-filter classes. Global filters are executed for every route defined in the API Gateway. The main difference between the pre-filter and post-filter classes is that the pre-filter code is executed before Spring Cloud API Gateway routes the request to a…

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by 0 comments on "The Header Predicate in Spring Cloud API Gateway"

One way to ensure that an HTTP request to a web service endpoint contains an Authorization JWT token is to configure a gateway route to require an Authorization header.  If the HTTP request does not contain an Authorization header, Spring Cloud API Gateway will not even route this request to a destination microservice. We can…

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by 0 comments on "Spring Cloud API Gateway Automatic Mapping of Routes"

This tutorial will teach you how to configure your Spring Cloud API Gateway to automatically create routes based on services registered with discovery clients like Eureka, Consul, or Zookeeper. For a step-by-step series of video lessons, please check this page: Spring Boot Microservices and Spring Cloud. Enable Discovery Locator A quick way to enable Spring Cloud…

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by 0 comments on "@LoadBalanced RestTemplate Call Internal Microservice"

In this tutorial, you will learn how to create an instance of @LoadBalanced RestTemplate and make it communicate with an internal microservice. For a step-by-step series of video lessons, please check this page: Spring Boot Microservices and Spring Cloud. Create RestTemplate Bean To create an instance of RestTemplate, you will need to first make sure…

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by 0 comments on "Pass Authorization Header to Downstream Microservice"

In this tutorial, you will learn how to make Zuul API Gateway pass an Authorization header to a downstream Microservice. To learn how to make Spring Boot Microservice read HTTP Request headers, please read this tutorial: Read HTTP Request Header in Spring MVC. Configure Zuul API Gateway to Forward an Authorization Header By default, Zuul…

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by 0 comments on "Docker Image for Spring Cloud Config Server"

In this tutorial, you will learn to create a Docker image for your Spring Cloud Config Server, which uses Symmetric or Asymmetric encryption to protect sensitive information. To learn how to create Spring Cloud Config that uses Symmetric encryption, read Spring Cloud Config – Symmetric Encryption and Decryption(Includes Video tutorial). And to learn how to create Spring…

Read More Docker Image for Spring Cloud Config Server