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Spring Cloud AWS – RDS In the previous article, we were focusing on EC2; now, let’s move on to the Relational Database Service. 1. RDS Support === 1.1. Simple Configuration Spring Cloud AWS can automatically create a DataSource just by specifying the RDS database identifier and the master password. The… Continue Reading spring-cloud-aws-rds
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MyBatis with Spring 1. Introduction MyBatis is one of the most commonly used open-source frameworks for implementing SQL databases access in Java applications. In this quick tutorial, we’ll present how to integrate MyBatis with Spring and Spring Boot. For those not yet familiar with this framework, be sure to check out… Continue Reading spring-mybatis
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One-to-One Relationship in JPA 1. Introduction In this tutorial, we’ll have a look at different ways of creating one-to-one mappings in JPA. We’ll need a basic understanding of the Hibernate framework, so please check out our Guide to Hibernate 5 with Spring for extra background. Further reading: Overview of JPA/Hibernate Cascade Types… Continue Reading jpa-one-to-one
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Efficient Word Frequency Calculator in Java 1. Overview In this tutorial, we’ll show various ways of implementing a word counter in Java. 2. Counter Implementations Let’s start by simply calculating the word count of words in this array: static String[] COUNTRY_NAMES = { “China”, “Australia”, “India”, “USA”, “USSR”, “UK”, “China”,… Continue Reading java-word-frequency
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RegEx for matching Date Pattern in Java 1. Introduction Regular expressions are a powerful tool for matching various kinds of patterns when used appropriately. In this article, we’ll use java.util.regex package to determine whether a given String contains a valid date or not. For an introduction to regular expressions, refer… Continue Reading java-date-regular-expressions
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Proxy in Hibernate load() Method 1. Overview In this tutorial, we’ll see what a proxy is in the context of Hibernate’s load() method. For readers new to Hibernate, consider getting familiar with basics first. 2. A Brief Introduction To Proxies and load() method By definition, a proxy is “a function authorized… Continue Reading hibernate-proxy-load-method
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How to Work with Dates in Thymeleaf 1. Introduction Thymeleaf is a Java template engine designed to work directly with Spring. For an intro to Thymeleaf and Spring, have a look at this write-up. Besides these basic functions, Thymeleaf offers us a set of utility objects that will help us… Continue Reading dates-in-thymeleaf
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Java 10 Performance Improvements 1. Overview In this quick tutorial, we will discuss the performance improvements that come along with the latest Java 10 release. These improvements apply to all applications running under JDK 10, with no need for any code changes to leverage them. 2. Parallel Full GC for G1… Continue Reading java-10-performance-improvements
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Microbenchmarking with Java 1. Introduction This quick article is focused on JMH (the Java Microbenchmark Harness). This has been added to the JDK starting with JDK 12; for earlier versions, we have to add the dependencies explicitly to our projects. Simply put, JMH takes care of the things like JVM… Continue Reading java-microbenchmark-harness
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Validating Container Elements with Bean Validation 2.0 1. Overview The 2.0 Version of the Java Bean Validation specification adds several new features, among which is the possibility to validate elements of containers. This new functionality takes advantage of type annotations introduced in Java 8. Therefore it requires Java version 8… Continue Reading bean-validation-container-elements
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