Home » Author Archives: Joel Patrick Llosa

Author Archives: Joel Patrick Llosa

Joel Patrick Llosa
I graduated from Silliman University in Dumaguete City with a degree in Bachelor of Science in Business Computer Application. I have contributed to many Java related projects at University of Southampton (iSolutions), Predictive Technologies, LLC., Confluence Service, North Concepts, Inc., NEC Telecom Software Philippines, Inc., and NEC Technologies Philippines, Inc. You can also find me in Upwork freelancing as a Java Developer.

Java EE Observer Design Pattern Example

1. Introduction Hi Java Code Geeks fan! This article is about a Java EE Observer Design Pattern Example. The observer pattern is one of the most widely used design pattern in programming. It is implemented in the java.util package of Java SE 8 as Observer and Observable. By extending these classes, we can easily implement the observer pattern. But this ...

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Eclipse with Wildfly and JBoss Tools Example

1. Introduction In this example, we will build a simple Java EE web project, also known as a “hello world” Java EE web application. We will be using Eclipse with Wildfly and JBoss Tools. First and foremost, let’s install the following: Eclipse WildFly JBoss Tools For WildFly, we’ll use the Java EE Full and Web Distributioin. Follow the respective instructions ...

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Spring vs Spring Boot Example

1. Spring vs Spring Boot Welcome to the Spring vs Spring Boot example. First and foremost, this is not Spring MVC vs Spring Boot. So you won’t find any discussion relating to web. The example that will be shown here is the simplest thing that could possibly work to show the difference between Spring and Spring Boot. When we speak ...

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Git Tutorial for Beginners

1. Git What? Welcome to the Git Tutorial for Beginners. What is Git? Git is a free and open source distributed version control system. It was originally developed by Linus Torvalds, the creator of the Linux operating system. Git is fast and can handle projects of different sizes. If you have a software project, chances are you will rely on ...

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Spring Data GemFire Tutorial

Welcome to the Spring Data GemFire tutorial. GemFire is a product from Pivotal. Pivotal Gemfire is an in-memory data grid powered by Apache Geode. Here is a quote from the Pivotal GemFire documentation: Pivotal GemFire is a data management platform that provides real-time, consistent access to data-intensive applications throughout widely distributed cloud architectures. GemFire pools memory, CPU, network resources, and ...

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Hibernate in Eclipse with PostgreSQL Example

This article will show you a simple example of how to use Hibernate in Eclipse with PostgreSQL. PostgreSQL is an object-relational database management system. It’s one of the most popular databases used in the world. Hibernate is a framework for mapping object-oriented domain model to a relational database. Hibernate handles persistent database accesses with high-level object handling functions. 1. Assumptions ...

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Java JDBC PostgreSQL Connection Example

This article is a Java JDBC PostgreSQL Connection Example. PostgreSQL is an object-relational database management system. It’s one of the most popular databases used in the world. This article will show you how Java connects to it using JDBC. 1. Tools and Requirements PostgreSQL download Eclipse Oxygen PostgreSQL JDBC driver download 2. Development Environment Setup This example is set up ...

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Spring JdbcBeanDefinitionReader Example

This article is about the Spring JdbcBeanDefinitionReader. When would you use this class? When you want to dynamically add externally defined bean definitions in Spring. The Spring JdbcBeanDefinitionReader is a bean definition reader that reads values from a database table and expects columns for bean name, property name and value as String. The formats for each are identical to the ...

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Spring Boot Security Example

Hi Spring Boot fans. Today, we will follow how Nick added Spring Boot Security to his web application. We will see how Nick protects his resources by adding Spring Boot Security. Spring Security provides a wide-range of security services services for Java EE-based enterprise software applications. The two main areas of application security that Spring Security targets are “authentication and ...

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Spring Boot Actuator Example

The Spring Boot Actuator helps you monitor and manage your application when you deploy it to production. Monitoring, gathering metrics, understanding the state of your app, etc. can be automatically applied when using this library. There are two ways of managing and monitoring your application, HTTP endpoint and JMX. This example demonstrates the HTTP endpoint. 1. Tools Apache Maven Mars ...

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