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Guide to Guava’s EventBus 1. Overview Guava library provides the EventBus which allows publish-subscribe communication between components. In this tutorial, we will look at how to use some of the features of the EventBus. 2. Setup To start we add the Google Guava library dependency in the pom.xml: <dependency> <groupId>com.google.guava</groupId>… Continue Reading guava-eventbus
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Java Web Weekly, Issue 131 At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since. Here we go… 1. Spring and Java ===== >> Java 9 Additions To Optional [codefx.org] Some interesting stuff… Continue Reading java-web-weekly-131
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Quick Intro to Full-Text Search with ElasticSearch 1. Overview Full-text search queries and performs linguistic searches against documents. It includes single or multiple words or phrases and returns documents that match search condition. ElasticSearch is a search engine based on Apache Lucene, a free and open-source information retrieval software library.… Continue Reading elasticsearch-full-text-search-rest-api
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Guide to ScribeJava 1. Introduction In this tutorial, we’re going to look at the ScribeJava library. ScribeJava is a simple OAuth client for Java which helps manage the OAuth flow. The main feature of the library is that it supports all major 1.0 and 2.0 OAuth APIs out-of-the-box. Moreover, if… Continue Reading scribejava
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X.509 Authentication in Spring Security 1. Overview In this article, we’ll focus on the main use cases for X.509 certificate authentication – verifying the identity of a communication peer when using the HTTPS (HTTP over SSL) protocol. Simply put – while a secure connection is established, the client verifies the… Continue Reading x-509-authentication-in-spring-security
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Authenticating with Amazon Cognito Using Spring Security 1. Introduction In this tutorial, we will look at how we can use Spring Security‘s OAuth 2.0 support to authenticate with Amazon Cognito. Along the way, we’ll briefly take a look at what Amazon Cognito is and what kind of OAuth 2.0 flows… Continue Reading spring-security-oauth-cognito
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Using @JsonComponent in Spring Boot 1. Overview This quick article is focused on how to use the @JsonComponent annotation in Spring Boot. The annotation allows us to expose an annotated class to be a Jackson serializer and/or deserializer without the need to add it to the ObjectMapper manually. This is… Continue Reading spring-boot-jsoncomponent
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Hibernate Entity Lifecycle 1. Overview Every Hibernate entity naturally has a lifecycle within the framework – it’s either in a transient, managed, detached or deleted state. Understanding these states on both conceptual and technical level is essential to be able to use Hibernate properly. To learn about various Hibernate methods… Continue Reading hibernate-entity-lifecycle
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How to Find the Kth Largest Element in Java 1. Introduction In this article, we’ll present various solutions for finding the kth largest element in a sequence of unique numbers. We’ll use an array of integers for our examples. We’ll also talk about each algorithm’s average and worst-case time complexity.… Continue Reading java-kth-largest-element
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RestTemplate with Digest Authentication 1. Overview This article will show how to configure the Spring RestTemplate to consume a service secured with Digest Authentication. Similar to Basic Authentication, once Digest auth is set in the template, the client will be able to go through the necessary security steps and get… Continue Reading resttemplate-digest-authentication
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