How To Send Heartbeats Periodically With ScheduledExecutorService In Java
While working on a licensing application, I had to develop a system to send heartbeats to a licensing server every 10 mins. In this blog post, we'll explore how to…
How to Configure Proxy Authentication for Java HTTP Client
In our previous tutorial, we implemented a thin REST API client application to consume secured CRUD REST APIs. However, the client does not support proxy authentication. Therefore, we are going to…
How to Exclude Non-fetched Lazy Fields from Jackson Serialization in 2 Steps
Problem While working on a project recently, I ran into an issue in which Hibernate was unnecessarily executing database queries to fetch some lazy associations. The reason is, I was…
How to Populate Database from CSV file in 2 Simple Steps
In the previous Part 1, Part 2 & Part 3 tutorial series, we developed REST APIs, secured one API with Basic authentication and all other APIs with OAuth2 JWT authentication,…
How to Configure Spring Security – Secure Different URLs Differently
In the previous Part 1 & Part 2 tutorial series, we developed REST APIs, secured them with OAuth2 JWT authentication, and documented them using OpenAPI 3 spec. Now, we are…
How to Configure OpenAPI 3 Spec with Basic & JWT Authentication
In the previous article, we implemented user registration and login with OAuth 2.0 bearer token authentication. Now, we are gonna document the API with OpenAPI 3 specification. Introduction The OpenAPI…
How to Secure Spring REST API with OAuth2 JWT Authentication
In the previous article, we implemented JWT authentication using custom spring security. However, it is not recommended to customize spring security, especially in enterprise-level applications. Because one defect in custom…
How to Make Multiple Rest API Calls in Parallel
Recently, I was given a task in which I had to call the OMDB API to fetch the box office value of 10 top-rated movies on the fly. Making 10…
How to Migrate a Microservice from MySQL to MongoDB
In the previous Part 1 & Part 2 tutorial series, we decomposed a monolithic Spring Boot application into 3 different microservices using Spring Cloud. All the microservices have their own…
How to Unit Test Repository with SpringBoot @DataJpaTest
In our previous tutorial, we implemented the soft delete functionality for the user entity and wrote a JUnit test to test the persistent layer. In this tutorial, we are gonna understand how…
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