Introduction In the constantly evolving world of web applications, fault tolerance and load distribution are no longer luxuries – they are necessities. Today’s digital ecosystem is characterized by high traffic volumes and the need for seamless user experiences, irrespective of the load on the system. As developers, we must ensure Read more…
Introduction Apache Kafka is a powerful distributed streaming platform that allows you to build real-time data pipelines and applications. Spring Boot 3, the latest version of the popular framework, offers a simplified approach to developing and deploying microservices. In this blog post, we will explore how to integrate Kafka with Read more…
Introduction The Gregorian calendar is the most widely used civil calendar in the world, while the Jalali calendar, also known as the Persian or Solar Hijri calendar, is primarily used in Iran and Afghanistan. In this blog post, we will demonstrate how to convert dates between these two calendars using Read more…
Introduction Unit testing is a critical aspect of software development, ensuring that your code is reliable, maintainable, and efficient. Angular, a popular web application framework, provides a robust set of tools for implementing unit testing, such as Jasmine and Karma. In this blog post, we will dive deep into unit Read more…
Introduction The rapid growth and evolution of web applications have brought forth an increasing demand for high-performance, scalable, and resilient systems. One critical aspect of achieving these goals is embracing non-blocking HTTP I/O in web afpplications. Non-blocking I/O is a technique that allows multiple tasks to be performed concurrently without Read more…
Abstract This article is about the non-blocking HTTP-IO semantics for Java Application Server Middleware Instances. Non-Blocking HTTP-IO in the context of Asynchronous Request Processing was introduced with the JSR 315 (Servlet 3.0) specification back in 2009 (that is also part of JAX-RS 2.0) [1,2,3]. Its purpose is to increase the Read more…
Abstract This best-practice article is about analyzing and fixing potential concurrency issues in the Wildfly Java Application Server. Concurrency problems can cause headaches, but multi-threading and process synchronisation is not rocket science, nor witchcraft. In a deterministic machine everything has a cause. Symptoms Requests to a WebApp crashes the whole Read more…
Abstract This article contains information about Concurrency applied to the world of Java in a compact format. Concurrency basics Parallelism in von-Neumann based machine architectures is actually just an emulated behaviour by process schedulers and needs further process synchronisation to work. As software engineer you usually have to coordinate thread Read more…
Abstract This article contains information about the Wildfly Java Application Server in a compact format. Enable SSL/HTTPS communication Precondition Provided: A PKCS12 Truststore file named truststore.pkcs12 with a domain certificate (you actually can use JKS as well) within the {$WILDFLY}/standalone/configuration directory. Procedure Using Wildfly 18 (and before) you can and Read more…
Abstract This article contains informations about the Oracle DBMS in a compact format. Problem & Solution PL/SQL Script Drop Table If Exists Regretfully a simple mechanism like DROP TABLE IF EXISTS known from PostgreSQL or MariaDB/MySQL still doesn’t exists in Oracle SQL. However you can use PL/SQL and Dynamic SQL Read more…