Tag Archives: Spring Boot

Quite often you need to provide users with the same data, but in different forms, like JSON, PDF, XLS, etc. If your application is Spring Framework based, this task can be achieved using HTTP message converters. HTTP message converters are applied when HTTP request (or its parts) needs to be converted into type required for handler method argument (see: Handler ...

Previously we set up two EntityManagers in the same application. One for the reads and one for the writes. Now it’s time to create our read repository. The read only repository will use the secondary read only EntityManager. In order to make it a read only repository, it is essential not to have any save and persist actions. 01 02 ...

Our previous setup works as expected. What we shall do now is to get one step further and configure two separate entity managers without affecting the functionality we achieved previously. The first step would be to set the default entity manager configuration to a primary one.This is the first step 01 02 03 04 05 06 07 08 09 10 ...

In our previous post we set up multiple PostgreSQL instances with the same data.Our next step would be to configure our spring project by using the both servers. As stated previously we shall use some of the code taken from the Spring Boot JPA post, since we use exactly the same database. This shall be our gradle build file 01 ...

This is a series of blog posts on our quest to increase our application’s performance by utilizing read replicas. For this project our goal is to set up our spring data application and use read repositories for writes and repositories based on read replicas for reads. In order to simulate this environment we shall use PostgreSQL instances through Docker. The ...

Hello Friends, In this tutorial,we will see how we can deploy a Spring Boot application over an AWS EC2 instance. Here are the steps we are going to perform. 1. Create a Spring Boot Project with Spring Boot Initialiser.2. Create a Rest end Point,which we can access after deployment3. Launch an EC2 instance4. Copy our Spring Boot project from our  ...

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JUnit 5 (JUnit Jupiter) is around for quite some time already and it is equipped with tons of features. But surprisingly JUnit 5 it is not a default test library dependency when it comes to the Spring Boot Test Starter: it is still JUnit 4.12, released back in 2014. If you consider using JUnit 5 in you next Spring Boot ...

WebClient to quote its Java documentation is Spring Framework’sNon-blocking, reactive client to perform HTTP requests, exposing a fluent, reactive API over underlying HTTP client libraries such as Reactor Netty. In my current project I have been using WebClient extensively in making service to service calls and have found it to be an awesome API and I love its use of ...