Introduction The new feature bulk delete operation in Criteria API was added in JPA 2.1. I will show you an example how to perform bulk delete using Spring JPA CriteriaDelete. The CriteriaDelete interface can be used to implement bulk delete operations. Delete operations performed through CriteriaDelete interface are directly mapped to database delete operations. Hence…

Posted in Spring Boot Spring JPA

Bulk Delete Using Spring JPA CriteriaDelete

Introduction The new feature bulk update operation in Criteria API was added in JPA 2.1. I will show you an example how to perform bulk update using Spring JPA CriteriaUpdate. The CriteriaUpdate interface can be used to implement bulk update operations. Update operations performed through CriteriaUpdate interface are directly mapped to database update operations. Hence…

Posted in Spring Boot Spring JPA

Bulk Update Using Spring JPA CriteriaUpdate

Introduction In the tutorial, Spring NamedParameterJdbcTemplate and MapSqlParameterSource Example, I had shown how to save new record in the database and how to fetch record from database. Here I am going to show you how to mock Spring JdbcNamedParameterTemplate SqlParameterSource with Junit Mockito. I am going to use Junit 5 framework for this example. I…

Posted in Junit Spring Boot Spring JDBC

Spring JdbcNamedParameterTemplate Junit Mockito

Introduction The example I will show you here about the asynchronous communication among microservices or how microservices communicate asynchronously among themselves. A microservices-based application is a distributed system running on multiple processes or services, usually even across multiple servers or hosts. Each service instance is typically a process. Therefore, services must interact using an inter-process…

Posted in Kafka Microservices Spring Boot

Microservices Asynchronous Communication – Push Notifications

Introduction Here in this example, I am going to show you how to create Spring Boot profile based logging. For any applications logging is an important things which will help you to debug through your application errors or issues and you can fix them easily by analyzing those errors or issues from the log files….

Posted in Log4J Spring Boot

Spring Boot Profile Based Logging

Introduction In this example I am going to show you how to start your spring boot application on HTTPS protocol. HTTPS is a secured protocol, whereas HTTP is unsecured protocol. So the data passed over the network using HTTPS protocol are generally encrypted data. The application which I am going to build is in the…

Posted in Security Spring Boot Spring MVC

Spring Boot Application Over HTTPS

Introduction In this example I am going to show you Spring Security Pre-authentication hasrole with Spring Data JPA. In my another example I had shown the similar example on Spring Security Pre-Authentication with Spring JDBC Template. There are situations where you want to use Spring Security for authorization, but the user has already been reliably…

Posted in Spring Boot Spring REST Spring Security

Spring Security Pre-Authentication with Spring Data JPA

Introduction Here I am going to build a system to log online user activity in Spring Boot applications using HandlerInterceptor interface. As an application owner you may want to track your user activities, such as, which page they are accessing, from where requests were made to your application, from which pages to which pages they…

Posted in Spring Boot Spring JPA Spring REST

How To Log Online User Activity In Spring Boot Applications

Introduction In this tutorial I am going to show you how to call Spring REST APIs concurrently using Java CompletableFuture. So basically REST service APIs will be invoked parallelly and in parallel execution the response time will be very less. I am going to show you how to call REST APIs concurrently using Java 8…

Posted in Microservices Spring Boot Spring REST

How To Call Spring REST APIs Concurrently using Java CompletableFuture

Table of Contents Introduction Prerequisites Download Large File Using WebClient Using RestTemplate Testing the APplication Source Code Introduction Here in this tutorial I am going to show you how to download large file using Spring REST API. Generally when you download a file, your file is stored into file system or you load it into…

Posted in Spring Boot Spring REST

Download Large File using Spring REST API

Introduction Here in this tutorial I am going to show you how to use AJAX technique using jQuery with Spring Boot application to check user availability instantly without refreshing the web page. I am going to use Thymeleaf template in Spring Boot application. I will use Spring REST to create REST API endpoint which will…

Posted in AJAX jQuery Spring Boot Spring REST

Spring Boot AJAX jQuery to check User Availability Instantly

Table of Contents Introduction Authentication/Authorization Flow Prerequisites Project Setup Authentication Service Spring Cloud Gateway Testing JWT Auth in Spring Cloud Gateway Source Code Introduction In this tutorial I am going to show you an example on Spring Cloud Gateway Security with JWT. JSON Web Tokens (JWT) are an open, industry standard RFC 7519 method for…

Posted in Spring Boot Spring Cloud Spring REST Spring Security Spring WebFlux

Spring Cloud Gateway Security with JWT (JSON Web Token)