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Hibernate Many to Many Annotation Tutorial 1. Introduction In this quick tutorial, we’ll have a quick look at how the @ManyToMany annotation can be used for specifying this type of relationships in Hibernate. 2. A Typical Example Let’s start with a simple Entity Relationship Diagram – which shows the many-to-many… Continue Reading hibernate-many-to-many

List of In-Memory Databases 1. Overview In-memory databases rely on system memory as opposed to disk space for storage of data. Because memory access is faster than disk access, these databases are naturally faster. Of course, we can only use an in-memory database in applications and scenarios where data doesn’t… Continue Reading java-in-memory-databases

Use Liquibase to Safely Evolve Your Database Schema 1. Overview In this quick tutorial, we’ll make use of Liquibase to evolve the database schema of a Java web application. We’re going to focus on a general Java app first, and we’re also going to take a focused look at some… Continue Reading liquibase-refactor-schema-of-java-app

Types of SQL Joins 1. Introduction In this tutorial, we’ll show different types of SQL joins and how they can be easily implemented in Java. 2. Defining the Model Let’s start by creating two simple tables: CREATE TABLE AUTHOR ( ID int NOT NULL PRIMARY KEY, FIRST_NAME varchar(255), LAST_NAME varchar(255)… Continue Reading sql-joins

A Guide to Jdbi 1. Introduction In this article, we’re going to look at how to query a relational database with jdbi. Jdbi is an open source Java library (Apache license) that uses lambda expressions and reflection to provide a friendlier, higher level interface than JDBC to access the database.… Continue Reading jdbi

Introduction to HikariCP 1. Overview In this introductory article, we’ll learn about the HikariCP JDBC connection pool project. This is a very lightweight (at roughly 130Kb) and lightning fast JDBC connection pooling framework developed by Brett Wooldridge around 2012. 2. Introduction There are several benchmark results available to compare the… Continue Reading hikaricp

OData Protocol Guide 1. Introduction In this tutorial, we’ll explore OData, a standard protocol that allows easy access to data sets using a RESTFul API. 2. What is OData? OData is an OASIS and ISO/IEC Standard for accessing data using a RESTful API. As such, it allows a consumer to… Continue Reading odata