Maps and Entities and JPA, OH MY!

Ryan McCullough Development Technology, Programming Leave a Comment

A client I’m working with has an email templating system that needs an upgrade! The current design utilizes a denormalized table that needed to grow a column every time a new unique token is needed. After a review of the offerings through JPA, I was happy to see that JPA had some support for java.util.Map through joins through a variety of the @MapKey annotation.

In this post, I’ll demonstrate the less frequently used methodology of applying and populating a Map of entities using a single table and a composite key.

Mapping Shortest Routes Using a Graph Database

Lou Mauget Databases, Development Technology, Java 11 Comments

Attention: The following article was published over 8 years ago, and the information provided may be aged or outdated. Please keep that in mind as you read the post.We often model interconnected data by cramming it in and out of table structures. Why don’t we simply model interconnected data as … interconnected data? I recently wrote that there are several …