In my tutorial Bean autowiring in Spring framework, I showed to you all three ways to automatically put a dependency object on a dependent object without having to use the ref or list attributes. In this tutorial, I will introduce you to another way of… Read More
In order to effectively manage the questions, we need to build a full-featured management page that allows us to manage the entire application from adding, deleting, correcting questions, categories to user management, new information that users update. At first, I thought to build the whole… Read More
The volatile variable in Java has the effect of informing the change of its value to different threads if the variable is being used in multiple threads. For you to understand more, I made an example as follows:
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public class VolatileExample { private volatile static int COUNT = 0; public static void main(String[] args) { new ChangeListener().start(); new ChangeMaker().start(); } static class ChangeListener extends Thread { @Override public void run() { int value = COUNT; // When value of COUNT variable is less than 5, this thread will loop forever to check the value of this variable while (value < 5) { if (value != COUNT) { System.out.println("Count variable changed to : " + COUNT); value = COUNT; } } } } static class ChangeMaker extends Thread { @Override public void run() { int value = COUNT; while (COUNT < 5) { System.out.println("Increasing value of count variable to " + (value + 1)); COUNT = ++value; try { Thread.sleep(500); } catch (InterruptedException e) { e.printStackTrace(); } } } } } |
In this example, we have two… Read More
On the frontend, Questions Management will use the Angular framework along with some other JavaScript libraries for development. I will also use the frontend-maven-plugin to manage the dependencies for this frontend. In this tutorial, we will be using the Angular CLI to create a new… Read More
Creating an Angular Project using the Angular CLI is nothing easier. You only need (after installing Angular CLI): Navigate to the directory where you want to create the Angular project Open terminal in macOS, Linux or command-line in Window Enter the following statement:
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ng new <project_name> |
with… Read More
Angular Command Line Interface (CLI) is a tool that allows us to start working with an Angular application quickly. It helps us to: Create a new Angular Application Run a development server, automatically populate when we make code changes. Run the test for the Angular… Read More
Normally, when working with the Node.js project, we usually ignore the node_modules directory, which is used to store Node.js dependencies, when committed to source code management systems such as Git, SVN because it’s not necessary. You can use the “npm install” command to install dependencies… Read More
GraalVM is a high-performance virtual machine built by Oracle that can run applications written in JavaScript, Python, Ruby, R, JVM-based languages such as Java, Scala, Kotlin, and LLVM-based languages. like C and C++. Using GraalVM, you do not need to install many different software to… Read More
Check out the full series of Questions Management tutorial here. API Services are the services that expose the API to external systems that can be used. They will call the other services in the Core Service or Composite Service depending on the needs of the… Read More
In the tutorial Basic about JPA, I introduced with you all to the JPA configuration file for working with JPA, named persistence.xml. In this tutorial, I will explain more about declaration in this file. As I said before, the persistence.xml file will contain information about… Read More
