Roy Tutorials

In this example I am going to show you how to upload and play video using flask framework. Flask is a light weight web framework used to rapidly develop web applications in Python programming language. I am not validating the file type here but it is always good idea to validate the file type before…

Here in this tutorial I am going to show you how you can return a list of objects from SOAP web service using PHP programming language. SOAP is an acronym and stands for Simple Object Access Protocol. SOAP web service supports only XML format data type. SOAP itself is a messaging protocol that defines the…

Here I am going to show you how to upload and play video using Django framework in Python programming. The uploaded video may or may not be played automatically but the uploaded video will have controls, such as, paly, pause, full screen, mute, unmute, download, etc. An upload form is displayed to the end user…

Introduction Here I am going to show you how to use AJAX in Django framework and how to upload files using Django jQuery and AJAX. This example can be used to upload both single and multiple files to the server. Only thing is you need to select single file if you want to upload only…

This example will show you what is a pangram and how to check a string is a pangram in Java program. A string is a pangram if it contains all letters or characters of alphabets (a to z or A to Z). A pangram or holoalphabetic sentence is a sentence using every letter of a…

Table of Contents Introduction Authentication/Authorization Flow Prerequisites Project Setup Authentication Service Spring Cloud Gateway Testing JWT Auth in Spring Cloud Gateway Source Code Introduction In this tutorial I am going to show you an example on Spring Cloud Gateway Security with JWT. JSON Web Tokens (JWT) are an open, industry standard RFC 7519 method for…

In this tutorial I am going to explain how to start Spring Cloud microservices on random ports. If you do not specify any port for each of your Spring Boot services, then they will run on the same port and only one application will start and rest of the applications will fail to start. One…

Introduction The ELK Stack is made of three open-source products: 1) Elasticsearch, 2) Logstash, and 3) Kibana. Elasticsearch: It is a NoSQL database which is based on the open-source search engine called Lucene. So Elasticsearch is a search and analytics engine. Logstash: It is a data processing pipeline tool which accepts inputs from (multiple) sources,…

Here in this tutorial I will tell you what are Dynamic Tests and @TestFactory in Junit 5 and how to create @TestFactory in Junit 5. Test cases, annotated with @Test, are static in the sense that they are fully specified at compile time, and their behavior cannot be changed by anything happening at runtime. In…

Introduction Here in this tutorial I will show you an example on how to test private methods using Junit framework. I am using Junit 5 framework to test the private method. Using Mockito framework you won’t be able to test private methods, but using PowerMock core API you will be able to test the private…

Introduction In this tutorial I am going to show you an example on CodeIgniter 4 multi language website. So the website built on CodeIgniter multilingual or multi-languages will have representations of the same information in different languages. I am going to use three different languages en (English), hi (Hindi), fr (French). You can have more…

In this tutorial I am going to show you how lookup method injection works in Spring framework. You may face a situation where you need to inject prototype scoped bean into singleton scoped bean. For singleton scoped bean a new instance or object is created and the same is returned each time it is injected…