After installing Apache Kafka, you can use the Apache Kafka CLI tool to work with topics in the Apache Kafka server. Create a new topic We will use the Apache Kafka CLI’s kafka-topics.sh file to work with topics in the Apache Kafka server. To create… Read More
MicroProfile is a set of APIs based on Jarkata EE that makes us easy to build Java Enterprise applications according to the microservices architecture model. These APIs include: With: Open Tracing is used to track the flow of a request to services. Open API is… Read More
Open Liberty is also a Java Server runtime that helps us run Java web applications. Using the Liberty Maven plugin will help us quickly deploy the application to Open Liberty easily during development. In this tutorial, I will show you how to use this Liberty… Read More
For requests with HTTP methods of POST, PUT, DELETE, usually we will need to define the request body. With RAML, how we will define the structure of the request body and how to define the response with RAML. In this tutorial, let’s find out together!… Read More
In the previous tutorial, I introduced you to RAML to define API spec. In this tutorial, I will guide you in more detail how to define request URL with RAML! As an example for this tutorial, first, I will create a new .raml file with… Read More
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
