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In the previous tutorial, we have learned how to fetch One-to-Many relationships using jOOQ. In this tutorial, we will learn how to fetch Many-to-Many relationships using jOOQ. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-boot-jooq-demo In our sample database, we have bookmarks and tags tables. Each bookmark can be associated with multiple bookmarks and vice-versa, so there is a Many-to-Many relationship between bookmarks and tags tables.

In the previous tutorial, we have learned how to fetch One-to-One relationships using jOOQ. In this tutorial, we will learn how to fetch One-to-Many relationships using jOOQ. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-boot-jooq-demo In our sample database, we have users and bookmarks tables. Each user can create multiple bookmarks, so there is a One-to-Many relationship between users and bookmarks tables. Let’s see how we can fetch a User details along with the bookmarks created by the user.

In the previous tutorial, we have learned how to implement basic CRUD Operations using jOOQ. In this tutorial, we will learn how to fetch One-to-One relationships using jOOQ. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-boot-jooq-demo Generally, when we are displaying a list of records, we will display minimal information about the record, and when the user clicks on the record, we will display the complete information about the record.

In the previous tutorial, we have seen how to generate jOOQ code using the testcontainers-jooq-codegen-maven-plugin and use jOOQ Typesafe DSL to execute SQL queries. In this tutorial, we will learn how to implement basic CRUD Operations using jOOQ. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-boot-jooq-demo In this tutorial, we will see how to perform basic CRUD (Create, Read, Update, Delete) operations on USERS table using jOOQ.

jOOQ is a Java persistence library that provides SQL DSL for writing typesafe SQL queries. It supports most of the popular databases like MySQL, PostgreSQL, Oracle, SQL Server, and many more. In this tutorial, we will learn how to get started with jOOQ for implementing persistence layer in a Spring Boot application. You can also use jOOQ in other JVM based languages like Kotlin, Scala, etc. In this jOOQ tutorial series, you will learn how to use jOOQ in a Spring Boot application for implementing:

In this article, we will learn how to implement Service to Service Communication using Client Credentials Flow. We will create the archival-service in which we will use a scheduler job to invoke the messages-service APIs to archive the messages. For implementing this, we will use Client Credentials Flow. We will also implement POST /api/messages/archive API endpoint in archival-service which can only be called by users who have ROLE_ADMIN role. Considering this, archival-service will act as a Resource Server and as a Client too.

In the previous articles, we have created messages-webapp and messages-service and invoked API endpoints using Postman. In this article, we will learn how to invoke the secured messages-service API endpoints from the Client application messages-webapp. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-security-oauth2-microservices-demo Show List of Messages As GET /api/messages API endpoint in messages-service is publicly accessible, we can invoke it from messages-webapp without any authentication.

In the previous article, we have created messages-webapp and secured it with Spring Security OAuth 2.0 using Authorization Code Flow. In this article, we will create messages-service, which is a Spring Boot Resource Server, and secure it with Spring Security OAuth 2.0. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-security-oauth2-microservices-demo Create messages-service You can generate messages-service using Spring Initializr by clicking on this link.

In this article, we will create messages-webapp which is a Spring MVC + Thymeleaf web application and secure it with Spring Security OAuth 2.0 using Keycloak. Source Code: You can find the complete source code of this project on GitHub: https://github.com/sivaprasadreddy/spring-security-oauth2-microservices-demo Setup Keycloak using Docker Compose In the previous article, we have already seen how to setup Keycloak using Docker Compose. Create docker-compose.yml file with the following content: version: '3.8' name: spring-security-oauth2-microservices-demo services: keycloak: image: quay.

In the previous articles, we have learned about various OAuth 2.0 / OpenID Connect flows using web browser, cURL and Postman. Now it’s time to put what we have learned into practice. What better way to do that than to build a sample project? While implementing OAuth 2.0 / OpenID Connect based security using a Security framework like Spring Security, many activities are performed by the framework under the hood. It is important to understand what is happening under the hood so that we can use the framework effectively.