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jOOQ Masterclass

jOOQ Masterclass

By : Anghel Leonard
4.6 (5)
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jOOQ Masterclass

jOOQ Masterclass

4.6 (5)
By: Anghel Leonard

Overview of this book

jOOQ is an excellent query builder framework that allows you to emulate database-specific SQL statements using a fluent, intuitive, and flexible DSL API. jOOQ is fully capable of handling the most complex SQL in more than 30 different database dialects. jOOQ Masterclass covers jOOQ from beginner to expert level using examples (for MySQL, PostgreSQL, SQL Server, and Oracle) that show you how jOOQ is a mature and complete solution for implementing the persistence layer. You’ll learn how to use jOOQ in Spring Boot apps as a replacement for SpringTemplate and Spring Data JPA. Next, you’ll unleash jOOQ type-safe queries and CRUD operations via jOOQ’s records, converters, bindings, types, mappers, multi-tenancy, logging, and testing. Later, the book shows you how to use jOOQ to exploit powerful SQL features such as UDTs, embeddable types, embedded keys, and more. As you progress, you’ll cover trending topics such as identifiers, batching, lazy loading, pagination, and HTTP long conversations. For implementation purposes, the jOOQ examples explained in this book are written in the Spring Boot context for Maven/Gradle against MySQL, Postgres, SQL Server, and Oracle. By the end of this book, you’ll be a jOOQ power user capable of integrating jOOQ in the most modern and sophisticated apps including enterprise apps, microservices, and so on.
Table of Contents (26 chapters)
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1
Part 1: jOOQ as a Query Builder, SQL Executor, and Code Generator
4
Part 2: jOOQ and Queries
11
Part 3: jOOQ and More Queries
16
Part 4: jOOQ and Advanced SQL
22
Part 5: Fine-tuning jOOQ, Logging, and Testing

jOOQ testing

Accomplishing jOOQ testing can be done in several ways, but we can immediately highlight that the less appealing option relies on mocking the jOOQ API, while the best option relies on writing integration tests against the production database (or at least against an in-memory database). Let's start with the option that fits well only in simple cases, mocking the jOOQ API.

Mocking the jOOQ API

While mocking the JDBC API can be really difficult, jOOQ solves this chore and exposes a simple mock API via org.jooq.tools.jdbc. The climax of this API is represented by the MockConnection (for mocking a database connection) and MockDataProvider (for mocking query executions). Assuming that jUnit 5 is used, we can mock a connection like this:

public class ClassicmodelsTest {
 public static DSLContext ctx;
 @BeforeAll
 public static void setup() {
  // Initialise your data provider
  MockDataProvider provider = new ClassicmodelsMockProvider();
 ...
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