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A Guide to the Spring State Machine Project 1. Introduction This article is focused on Spring’s State Machine project – which can be used to represent workflows or any other kind of finite state automata representation problems. 2. Maven Dependency To get started, we need to add the main Maven… Continue Reading spring-state-machine
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Implementing Simple State Machines with Java Enums Algorithms Java 1. Overview In this tutorial, we’ll have a look at State Machines and how they can be implemented in Java using Enums. We’ll also explain the advantages of this implementation compared to using an interface and a concrete class for each… Continue Reading java-enum-simple-state-machine
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Adding Copyright License Header for Java Source Files in Eclipse 1. Overview Adding a copyright license header for source files in the Eclipse IDE is known to be a difficult and error-prone task. In this tutorial, we’ll learn two ways to make this task easy and error-free. The first uses… Continue Reading eclipse-copyright-header
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Introduction to the OrientDB Java APIs 1. Overview OrientDB is an open source Multi-Model NoSQL database technology designed to work with the Graph, Document, Key-Value, GeoSpatial and Reactive models while managing queries with SQL syntax. In this article, we’ll cover the setup and use the OrientDB Java APIs. 2.… Continue Reading java-orientdb
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Introduction to Flowable 1. Overview Flowable is a business process engine written in Java. In this tutorial, we’ll go through the details of business processes and understand how we can leverage the Flowable Java API to create and deploy a sample business process. 2. Understanding Business Processes Simply put, a… Continue Reading flowable
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Java Global Exception Handler 1. Overview In this tutorial, we’ll focus on the Global Exception Handler in Java. We’ll first discuss the basics of the exceptions and the exception handling. Then we’ll have a comprehensive look on the global exception handler. To learn more about the exceptions in general, have… Continue Reading java-global-exception-handler
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Java Weekly, Issue 196 Lots of interesting writeups on Java 9 this week. Here we go… 1. Spring and Java ===== >> Java 9 and IntelliJ IDEA [blog.jetbrains.com] It’s nice to see that tools are adapting to new releases super quickly ? >> Sneakily Throwing Exceptions in Lambda Expressions in… Continue Reading java-weekly-196
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Optional orElse Optional 1. Introduction In some cases, we might want to fallback to another Optional instance if another one is empty. In this tutorial, we’ll briefly mention how we can do that – which is harder than it looks. For an introduction to the Java Optional class, have a… Continue Reading java-optional-or-else-optional
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Check if a String is a Palindrome 1. Introduction In this article, we’re going to see how we can check whether a given String is a palindrome using Java. A palindrome is a word, phrase, number, or other sequences of characters which reads the same backward as forward, such as… Continue Reading java-palindrome
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Guide to ShedLock with Spring 1. Overview Spring provides an easy to implement API for scheduling jobs. It works great until we deploy multiple instances of our application. Spring by default cannot handle scheduler synchronization over multiple instances and executes the jobs simultaneously on every node instead. In this short tutorial,… Continue Reading shedlock-spring
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