I have shown you how to install FTP server on Ubuntu. In this tutorial, I will guide you to install FTP server using Docker! We will be using vsftpd Docker Image at Docker Hub https://hub.docker.com/r/fauria/vsftpd/. This Docker Image exposes many different environment variables so that… Read More
In the Jakarta EE RESTful Web Services application, to define the request URL, we will use the @Path annotation. This annotation has only one attribute, value(), whose value is the request URL we want to define. You can define the @Path annotation at class level… Read More
Offline access is a feature of OpenID Connect defined at https://openid.net/specs/openid-connect-core-1_0.html#OfflineAccess. It allows the application with an offline token (a kind of refresh token) to get access token and use resources without the user having to log in, for a long time or forever. Keycloak… Read More
ServletContext is an object instantiated by Web Container when we deploy a Jakarta EE web application. It is used to store and retrieve information that we configure for all the Servlets present in the application. And ServletConfig helps us get information defined for a particular… Read More
I introduced Refresh Token grant type in OAuth 2.0 in the tutorial about Grant types in OAuth 2.0. In this tutorial, I will show you how we get a new access token using refresh token with Keycloak! First, I will create a new client in… Read More
In the previous tutorial, I showed you how to add a new client in Keycloak and also showed you how to configure a client that supports grant type Authorization Code with PKCE of OAuth2. In this tutorial, I will show you how to add and… Read More
ServletContextEvent and ServletContextListener are two objects of Jakarta EE Servlet that are responsible for recording and handling changes in the ServletContext of a web application when this web application is deployed to the Server Runtime. Any changes to the ServletContext, the ServletContextEvent will log and… Read More
In the previous tutorial, I showed you how to install Apache Kafka on macOS. Installing Apache Kafka using Docker Compose will help us quickly start up an Apache Kafka server without much effort, just install Docker and a docker-compose.yml file. How is it in detail?… Read More
I introduced you to OAuth 2.0 and OAuth 2.0 is just a framework related to Authorization, that is, it only defines what resources a Client Application can use, in the access token, so that when requesting to the Resource Server, Resource Server will base on… Read More
In this tutorial, I will show you how to install Apache Kafka on macOS! First, go to Apache Kafka’s Download page at https://kafka.apache.org/downloads to download its latest version! After the download is complete, please unzip this download file: Apache Kafka depends on Apache ZooKeeper for cluster… Read More
