I always wondered what can be the different ways in which the microservices can commmunicate with each other. Like majority of us I almost instintively thought of REST or SOAP as two prominant ways of passing data over internet, but are there other better ways of making the different components of an enterprise systen talk to each other? If yes what is the purpose of their existance, lets address these and other related queries in this article. The manner in which micro services talk to each other can be classified in four major categories: Synchronous Communication Asynchronous Communication Database Level Communication Hybrid Lets explore them one by one - Synchronous Communication In this style of inter service communication a sender service requests some resource from its counterpart and then waits for the response before proceeding ahead. This is also called blocking mode because the caller is blocked till it gets wahat it had requested. Lets explore some protocols which use ...
Let’s embark on a journey to discover the most important parts of Java 21 . I’ll cover the essentials, highlight new features in Java 21, and provide code samples and explanations. At the end of this article you’ll get a solid foundation and pointers for deeper study. Let's get started! Java 21: 1 Hour Crash Course 1. Introduction Java is a powerful, object-oriented programming language. Java 21, released in September 2023, brings performance improvements and new features. Prerequisites: Basic programming concepts (variables, loops, functions). Java installed (JDK 21). 2. Your First Program public class HelloWorld { public static void main ( String [ ] args ) { System . out . println ( "Hello, Java 21!" ) ; } } public class HelloWorld — Defines a class. public static void main — Entry point. System.out.println — Prints to console. 3. Variables and Data Types int age = 25 ; double price = 19.99 ; boolean isJavaFun = true ...