PostgreSQL is an open-source object-relational database system. We have different ways to install PostgreSQL server on many different environments, as well on macOS. In this tutorial, I will show you a way to install PostgreSQL server on macOS using Postgres.app! First, you need to go… Read More
To use applications that use Keycloak for authentication and authorization, we need a user to log in. Usually, in large systems, the user information will be stored in Active Directory (AD) or LDAP, Keycloak can connect to these systems to retrieve user information. It can… Read More
Clients in Keycloak are applications that interact with it for authentication and authorization. Adding a new client in Keycloak is letting it manage all clients that will connect to it, according to which protocol, which standard authentication and authorization. In this tutorial, I will show… Read More
Realm is a concept in Keycloak that refers to an object managing a set of users along with their credentials, roles and groups. A user in Keycloak belongs to only one realm and the user who logs in to Keycloak will log into that user’s… Read More
Keycloak is an open-source software for managing access for any application. It supports many different authentication and authorization standards such as Single Sign-On (basically, we can use our login information for many different applications), OpenID Connect, LDAP, and more … In this tutorial, I will… Read More
Previously, when declaring a multi-line text in Java, for example:
|
1 2 |
Welcome to Huong Dan Java My name is Khanh |
We will usually declare the following:
|
1 2 |
String text = "Welcome to Huong Dan Java \n" + "My name is Khanh"; |
Result: But from Java 13 onwards, you do not need to declare so anymore. Java now supports the text blocks with the ability to declare multiple lines… Read More
The reduce() function in DataWeave 1 and 2 is a function that helps us able to manipulate the elements of an array and output the type of data that we want. To do this, the parameters of the reduce() function include the item in the… Read More
To be able to make authentication and authorization for the requests to the web application, Spring Security must act as an interceptor of these applications. It will intercept and process the requests before those requests are actually processed by the application and return results. In… Read More
The pluck() function in DataWeave 2 is a function used to convert the properties and values of these properties of an object into an array of properties, an array of values and an array of indices of those properties. The syntax of the pluck() function… Read More
The grant type is how OAuth 2.0’s Authorization Server can process and verify that the Client Application is eligible for access to the Resource Server. There are 5 types of grant types that OAuth 2.0 defines in its spec: Authorization Code Implicit Resource Owner Password… Read More
