In real projects, you may encounter some cases where the application needs to use two different login methods depending on the user’s role, for example, there are applications that will need normal users to login using tokens or QR code, and admin login using username… Read More
Last week was a busy week for Khanh. Beside of the company’s work, I’m currently working on some old open sources like Abeille Forms Designer, mvnForum or openid-connect-spring-boot on my Github. Abeille Forms Designer is used to design forms with Java Swing, which I believe,… Read More
In addition to supporting generating public key and private key, Java also supports us to convert these public key and private key files to Java objects. We just need to know the data format used in these files! First, you need to read these files… Read More
After a long time, I just noticed this morning that I haven’t received emails from you guys recently. Checked the Contact Form again, there is a error! If you have contacted me in the past time but have not received a response, please let me… Read More
The Authorization Server in OAuth has the task of issuing an access token that allows the Client Application to use this access token to request the resource it needs to use. The Resource Server will validate this access token with the Authorization Server every time… Read More
In OAuth 2.0, we can have many different types of Client Applications that users can use to access Resource Server’s resources. For example, we have native mobile applications, web applications including Single Page Application, console or backend applications, etc. These Client Applications will need to… Read More
Java Module System was introduced by Java from Java 9 to solve some problems of Java that if you notice you will see how its necessary? NoClassDefFoundError: This error occurs while our Java program is running. The JVM cannot find the class needed to execute… Read More
We use Dockerfile to configure and build Docker images. To run Docker containers from these Docker images, you can use the command line or Docker Compose. The benefit of Docker Compose is that you can define and run multiple Docker containers at the same time.… Read More
To install PostgreSQL with Docker, you have 2 options, either use Docker Command or use Docker Compose. In this tutorial, I will guide you through both of these options to install the PostgreSQL server using Docker! In this tutorial, I will show you how to… Read More
As I said in the tutorial about Overview about request processing in Spring Security, the UsernamePasswordAuthenticationFilter class is a filter that will take care of authentication in Spring Security and by default, the user’s username and password information will be used for the authentication process.… Read More
