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Java Weekly, Issue 243 Here we go… 1. Spring and Java ===== >> Deep Dive into JUnit 5 Extension Model [infoq.com] This great write-up introduces a clever extension for creating and executing BDD specification tests. Very cool. >> How to Implement a Custom, Sequence-Based ID Generator [thoughts-on-java.org] If you don’t want to… Continue Reading java-weekly-243
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Bloom Filter in Java using Guava 1. Overview In this article, we’ll be looking at the Bloom filter construct from the Guava library. A Bloom filter is a memory-efficient, probabilistic data structure that we can use to answer the question of whether or not a given element is in a… Continue Reading guava-bloom-filter
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A Guide to System.exit() 1. Overview In this tutorial, we’ll have a look at what System.exit means in Java. We’ll see its purposes, where to use and how to use it. We’ll also see what’s the difference in invoking it with different status codes. 2. What is System.exit? System.exit is… Continue Reading java-system-exit
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Spring Security – @PreFilter and @PostFilter 1. Overview In this article, we’ll learn how to use the @PreFilter and @PostFilter annotations to secure operations in a Spring application. When used together with the authenticated principal information, @PreFilter and @PostFilter allows us to define fine-grained security rules using Spring Expression Language.… Continue Reading spring-security-prefilter-postfilter
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Spring Security Kerberos Integration 1. Overview In this tutorial, we’ll provide an overview of Spring Security Kerberos. We’ll write a Kerberos client in Java that authorizes itself to access our Kerberized service. And we’ll run our own embedded Key Distribution Center to perform full, end-to-end Kerberos authentication. All that, without… Continue Reading spring-security-kerberos-integration
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The Difference Between Collection.stream().forEach() and Collection.forEach() 1. Introduction There are several options to iterate over a collection in Java. In this short tutorial, we’ll look at two similar looking approaches — Collection.stream().forEach() and Collection.forEach(). In most cases, both will yield the same results, however, there are some subtle differences we’ll… Continue Reading java-collection-stream-foreach
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Baeldung Weekly Review 12 At the very beginning of 2014 I decided to track my reading habits and share the best stuff here, on Baeldung. 2014 has been quite the year, covering each week with a review. I’ve been doing a lot more reading to make sure I cover and… Continue Reading 2015-week-review-12
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Using a Spring Boot Application as a Dependency 1. Overview In this tutorial, we’ll see how to use a Spring Boot application as a dependency of another project. 2. Spring Boot Packaging The Spring Boot Maven and Gradle plugins both package our application as executable JARs – such a file… Continue Reading spring-boot-dependency
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Guide to Collections API in Vavr 1. Overview The Vavr library, formerly known as Javaslang, is a functional library for Java. In this article, we explore its powerful collections API. To get more information about this library, please read this article. 2. Persistent Collections A persistent collection when modified produces… Continue Reading vavr-collections
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Spring Application Context Events 1. Introduction In this tutorial, we’ll learn about the event support mechanism provided by the Spring framework. We’ll explore the various built-in events provided by the framework and then see how to consume an event. To learn about creating and publishing custom events, have a look… Continue Reading spring-context-events
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