Angular Okta SSO (Single Sign On) with PKCE

Introduction Here I am going to show you how to build an application using Angular for authenticating a user using Okta SSO (Single Sign On) with PKCE. Okta is an enterprise level identity provider that helps you to enable Single Sign-On across applications within an enterprise. Angular is a single page application (SPA) and it is recommended that you use…

Fix Oracle Logon Denied Error In Pivotal Cloud Foundry

Introduction Are you getting logon denied error while starting or deploying your Spring Boot application into Pivotal Cloud Foundry (PCF) cloud environment? Generally, logon denied error occurs while your application is trying to connect to database server. The error you get in your application log is similar to the following error: From the above error message it is clear that…

Fix RabbitMQ Startup Errors After Installation

Introduction In this tutorial I am going to explain about few common startup problems or errors of RabbitMQ server after a fresh installation. I am using 3.6.1 version of the RabbitMQ message broker. RabbitMQ Startup Errors You might have faced the following errors during starting the RabbitMQ message broker after installation in your system. Starting broker… completed with 0 plugins….

Git Branching Workflows – How To Work with Different Branches

Introduction Here in this tutorial I am going to explain what are the different branching strategy in Git repository, I will talk about different git branching workflows and how to work with different branches in Git repository. You might have heard of or seen different branches in Git repository, such as, master, develop, feature, release, etc. Among these branches there…

Codeigniter 4 AJAX MySQL Multiple Rows Deletion

Multiple Rows Deletion Here I am going to build an example on how to select multiple rows from HTML table and delete these multiple selected table rows from MySQL database using CodeIgniter 4 with the help of AJAX technique in jQuery. In this tutorial I am going to fetch all records from the MySQL database and displaying on an HTML…

How To Create Maven Project Using CLI

Introduction Here I will show you how to create maven project using CLI. CLI means command line interface, so you need to use command line tool (cmd prompt) in Windows or Shell terminal in Unix based system. You can use any IDE (for example, Eclipse) or tool to create a new maven project. During project creation you need to mention Group…

Angular Spring Boot Security JWT Authentication And Authorization

Introduction In this post you will see an example about Angular Spring Boot Security JWT (JSON Web Token) Authentication and role based Authorization for REST APIs or RESTful services. I won’t explain here about JWT as there is already very good article on JWT. I will implement Spring Security’s UserDetailsService to load user from database. I will use Spring Data JPA…

Bootstrap AJAX Spring Boot Pagination

Introduction In this tutorial I will use Spring Data JPA Pageable to build REST API for pagination in Spring Boot applications. Here, I am going to show you how to build pagination using Bootstrap jQuery – AJAX with Spring Boot applications. Using jQuery – AJAX, you don’t need to load or fetch all records from server side, and you are…

How To Use Specific JDK Version For Gradle Build

Introduction Are you stuck or confused how to build a Java or Spring Boot project when your system has multiple versions of Java or JDK installed? I will show you how to use specific jdk version for gradle build. Java version might be different in your classpath than what you want to use in your project and probably you might…

How To Extract Text From Images In Python

Introduction In this example I will show you how to extract text from images in Python program. The text extraction from image could be used for various purpose, for example, data mining for machine learning projects, reading the content from images can be used for further processing in your applications. To extract text from image I am going to use…