Grails with Spring Security

1. Overview of Spring Security Integration with Grails Spring Security touts a number of authentication, authorization, instance-based, and various other features that make it so attractive to secure applications with. With this in mind, due to Grails use of Spring’s Inversion of Control Framework and MVC setup, developers sought to use Spring Security to secure […]

Resource and Dependency Injection in Java EE 7

1. Overview Contexts and Dependency Injection (CDI) is a feature of Java EE that helps meld the web tier and transactional tier of its platform that is included in Java EE 6 and higher. From a technical perspective, what this means is that CDI offers a dependency injection framework and also manages the dependencies’ lifecycle. […]

Converting HTML to RichTextString for Apache POI

1. Overview In this tutorial, we will be building an application that takes HTML as an input and creates a Microsoft Excel Workbook with a RichText representation of the HTML that was provided. To generate the Microsoft Excel Workbook, we will be using Apache POI. To analyze the HTML, we will be using Jericho. The […]

Intro to Spring Cloud Config Server

1. Overview In this tutorial, we will review the basics of Spring Cloud Config Server. We will setup a Config Server and then build a client application that consumes the configuration on startup and then refreshes the configuration without restarting. The application we are building is the same “Hello World” application discussed in the Centralized Configuration Getting […]

Converting XML to JSON + Raw Use in MongoDB + Spring Batch

Overview Why convert XML to JSON for raw use in MongoDB? Since MongoDB uses JSON documents in order to store records, just as tables and rows store records in a relational database, we naturally need to convert our XML to JSON. Some applications may need to store raw (unmodified) JSON because there is uncertainty in […]

Spring Batch CSV Processing

Overview Topics we will be discussing include the essential concepts of batch processing with Spring Batch and how to import the data from a CSV into a database. 0 – Spring Batch CSV Processing Example Application We are building an application that demonstrates the basics of Spring Batch for processing CSV files. Our demo application […]

Validation in Thymeleaf + Spring

Overview Important topics we will be discussing are dealing with null values, empty strings, and validation of input so we do not enter invalid data into our database. In dealing with null values, we touch on use of java.util.Optional which was introduced in Java 1.8. 0 – Spring Boot + Thymeleaf Example Form Validation Application […]