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Guide to Ebean ORM 1. Introduction Ebean is an object-relational mapping tool written in Java. It supports the standard JPA annotations for declaring entities. However, it provides a much simpler API for persisting. In fact, one of the points worth mentioning about the Ebean architecture is that it is sessionless,… Continue Reading ebean-orm

Data Modeling in Cassandra 1. Overview Cassandra is a NoSQL database that provides high availability and horizontal scalability without compromising performance. To get the best performance out of Cassandra, we need to carefully design the schema around query patterns specific to the business problem at hand. In this article, we… Continue Reading cassandra-data-modeling

A Guide to Apache Commons DbUtils 1. Overview Apache Commons DbUtils is a small library that makes working with JDBC a lot easier. In this article, we’ll implement examples to showcase its features and capabilities. 2. Setup ==== 2.1. Maven Dependencies First, we need to add the commons-dbutils and h2… Continue Reading apache-commons-dbutils

A Guide to Neo4J with Java 1. Introduction This article is about Neo4j – one of the most mature and full-featured graph databases on the market today. Graph databases approach the task of data modeling with the view that many things in life lend themselves to being represented as a… Continue Reading java-neo4j

Integration Testing with a Local DynamoDB Instance Persistence 1. Overview If we develop an application which uses Amazon’s DynamoDB, it can be tricky to develop integration tests without having a local instance. In this tutorial, we’ll explore multiple ways of configuring, starting and stopping a local DynamoDB for our integration… Continue Reading dynamodb-local-integration-tests

A Guide to DeltaSpike Data Module 1. Overview Apache DeltaSpike is a project which provides a collection of CDI extensions for Java projects; it requires a CDI implementation to be available at runtime. Of course, it can work with the different implementation of CDI – JBoss Weld or OpenWebBeans. It’s also… Continue Reading deltaspike-data-module

Guide to MapDB 1. Introduction In this article, we’ll look at the MapDB library — an embedded database engine accessed through a collection-like API. We start by exploring the core classes DB and DBMaker that help configure, open, and manage our databases. Then, we’ll dive into some examples of MapDB data structures that… Continue Reading mapdb