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Facade Design Pattern in Java 1. Introduction In this quick tutorial, we’re going to take a look at one of the structural design patterns: the Facade. First, we’ll give an overview of the pattern, list its benefits and describe what problems it solves. Then, we’ll apply the facade pattern to an… Continue Reading java-facade-pattern
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Using Apache Camel with Spring 1. Overview This article will demonstrate how to configure and use Apache Camel with Spring. Apache Camel provides quite a lot of useful components that support libraries such as JPA, Hibernate, FTP, Apache-CXF, AWS-S3 and of course many others – all to help integrating data… Continue Reading spring-apache-camel-tutorial
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The Baeldung Weekly Review 21 1. Java and Spring ===== >> Java 8 StampedLocks vs. ReadWriteLocks and Synchronized A practical look and benchmark using four modes of locking – synchronized, RW Lock, Stamped RW lock and RW optimistic locking. Nice writeup, lots to learn from this one. >> Parsing a… Continue Reading 2014-week-review-21
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Spring Security: Authentication with a Database-backed UserDetailsService 1. Overview In this article, we will show how to create a custom database-backed UserDetailsService for authentication with Spring Security. 2. UserDetailsService The UserDetailsService interface is used to retrieve user-related data. It has one method named loadUserByUsername() which can be overridden to customize… Continue Reading spring-security-authentication-with-a-database
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Print Even and Odd Numbers Using 2 Threads 1. Introduction In this tutorial, we’re going to have a look at how we can print even and odd numbers using two threads. The goal is to print the numbers in order, while one thread only prints the even numbers and the other… Continue Reading java-even-odd-numbers-with-2-threads
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Kotlin Contracts 1. Overview In this tutorial, we will talk about Kotlin Contracts. Their syntax is not stable yet, but the binary implementation is, and Kotlin stdlib itself is already putting them to use. Basically, Kotlin contracts are a way to inform the compiler about the behavior of a function. 2. Maven… Continue Reading kotlin-contracts
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Double Dispatch in DDD 1. Overview Double dispatch is a technical term to describe the process of choosing the method to invoke based both on receiver and argument types. A lot of developers often confuse double dispatch with Strategy Pattern. Java doesn’t support double dispatch, but there are techniques we… Continue Reading ddd-double-dispatch
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A Guide to Java Enums 1. Overview In this article, we will see what Java enums are, what problems they solve and how some of the design patterns they can be used in practice. The enum keyword was introduced in Java 5. It denotes a special type of class that… Continue Reading a-guide-to-java-enums
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Java Timer 1. Timer – The Basics Timer and TimerTask are java util classes used to schedule tasks in a background thread. In a few words – TimerTask is the task to perform and Timer is the scheduler. 2. Schedule a Task Once Let’s start by simply running a single… Continue Reading java-timer-and-timertask
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Spring Cloud Data Flow With Apache Spark 1. Introduction Spring Cloud Data Flow is a toolkit for building data integration and real-time data processing pipelines. Pipelines, in this case, are Spring Boot applications that are built with the use of Spring Cloud Stream or Spring Cloud Task frameworks. In this tutorial,… Continue Reading spring-cloud-data-flow-spark
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