About the Author

Mark Adelsberger

Mark is a software developer with the Keyhole team living in St. Louis. In addition to expertise surrounding Java and JavaScript technologies, Mark has spent time focused on data/ETL in his 17+ years of experience in both “start-up” and Fortune 500 organizations.

The Data Access Layer, Part 2 – Using the Criteria API

Mark Adelsberger Architecture, Tutorial 3 Comments

Attention: The following article was published over 9 years ago, and the information provided may be aged or outdated. Please keep that in mind as you read the post.In Part One of this series, I reviewed the basic design goals of a Data Access Layer (DAL), those being: Contain all of the information about the persistence mechanism; and Contain none …

The Data Access Layer, Part 1 – The Basics (And When Things Aren’t So Basic)

Mark Adelsberger Architecture 5 Comments

Attention: The following article was published over 9 years ago, and the information provided may be aged or outdated. Please keep that in mind as you read the post.Today, I’d like to talk about the data access layer (DAL). I’ll start with a brief review: the motivation behind the DAL, the design principles that define a theoretically “good” DAL, and …