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java-localdate-to-xmlgregoriancalendar

Converting Between LocalDate and XMLGregorianCalendar 1. Overview In this quick tutorial, we’ll discuss LocalDate and XMLGregorianCalendar and provide examples of converting between the two types. 2. XMLGregorianCalendar The XML Schema standard defines clear rules for specifying dates in XML format. In order to use this format, the Java class XMLGregorianCalendar,… Continue Reading java-localdate-to-xmlgregoriancalendar

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Java Dates
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websockets-api-java-spring-client

A Java Client for a WebSockets API 1. Introduction HTTP (Hypertext Transfer Protocol) is a stateless request-response protocol. Its simple design makes it very scalable but unsuitable and inefficient for highly interactive real-time web applications because of the amount of overhead that needs to be transmitted along with every request/response.… Continue Reading websockets-api-java-spring-client

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: WebSockets
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manually-set-user-authentication-spring-security

How to Manually Authenticate User with Spring Security 1. Overview In this quick article, we’ll focus on how to programmatically set an authenticated user in Spring Security and Spring MVC. 2. Spring Security Simply put, Spring Security hold the principal information of each authenticated user in a ThreadLocal – represented… Continue Reading manually-set-user-authentication-spring-security

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Authentication
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java-lang-processbuilder-api

Guide to java.lang.ProcessBuilder API 1. Overview The Process API provides a powerful way to execute operating system commands in Java. However, it has several options that can make it cumbersome to work with. In this tutorial, we’ll take a look at how Java alleviates that with the ProcessBuilder API. 2.… Continue Reading java-lang-processbuilder-api

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Java
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dagger-2

Introduction to Dagger 2 1. Introduction In this tutorial, we’ll take a look at Dagger 2 – a fast and lightweight dependency injection framework. The framework is available for both Java and Android, but the high-performance derived from compile-time injection makes it a leading solution for the latter. 2. Dependency… Continue Reading dagger-2

java-web-weekly-165

Java Web Weekly, Issue 165 Lots of interesting writeups on Java 9 this week. Here we go… 1. Spring and Java ===== >> From Microservices to Distributed Systems – Survival guide for Java Developers [eisele.net] Another solid way of doing a microservice implementation ? >> What’s the Top Java Logging… Continue Reading java-web-weekly-165

java-linked-list-cyclicity

Test a Linked List for Cyclicity 1. Introduction A singly linked list is a sequence of connected nodes ending with a null reference. However, in some scenarios, the last node might point at a previous node – effectively creating a cycle. In most cases, we want to be able to… Continue Reading java-linked-list-cyclicity

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Java
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hibernate-named-query

Hibernate Named Query 1. Overview A major disadvantage of having HQL and SQL scattered across data access objects is that it makes the code unreadable. Hence, it might make sense to group all HQL and SQL in one place and use only their reference in the actual data access code.… Continue Reading hibernate-named-query

java-ee-cdi

An Introduction to CDI (Contexts and Dependency Injection) in Java Java EE 1. Overview CDI (Contexts and Dependency Injection) is a standard dependency injection framework included in Java EE 6 and higher. It allows us to manage the lifecycle of stateful components via domain-specific lifecycle contexts and inject components (services)… Continue Reading java-ee-cdi

lucene

Introduction to Apache Lucene 1. Overview Apache Lucene is a full-text search engine which can be used from various programming languages. In this article, we’ll try to understand the core concepts of the library and create a simple application. 2. Maven Setup To get started, let’s add necessary dependencies first:… Continue Reading lucene