Book Image

Enterprise Application Development with Ext JS and Spring

By : Gierer
Book Image

Enterprise Application Development with Ext JS and Spring

By: Gierer

Overview of this book

Spring and Ext JS are cutting edge frameworks that allow us to build high performance web applications for modern devices, that are now consuming data at a faster rate than ever before. It is the appropriate time for you to understand how to best leverage these technologies when architecting, designing, and developing large scale web development projects. This practical guide condenses an approach to web development that was gained from real world projects, and outlines a simple, practical approach to developing high performance, and enterprise grade web applications. Starting with configuring Java, NetBeans, and MySQL to prepare your development environment, you will then learn how to connect your NetBeans IDE to the MySQL database server. We will then explore the Task Time Tracker (3T) project database structure and populate these tables with test data. Following on from this, we will examine core JPA concepts after reverse engineering the domain layer with NetBeans. Leveraging the Data Access Object design pattern, you will learn how to build the Java DAO implementation layer assisted by generics in base classes, followed by a Data Transfer Object enabled service layer to encapsulate the business logic of your 3T application. The final chapters that focus on Java explore how to implement the request handling layer using Spring annotated controllers, and deploy the 3T application to the GlassFish server. We will then configure the Ext JS 4 development environment and introduce key Ext JS 4 concepts, including MVC and practical design conventions. Covering a variety of important Ext JS 4 strategies and concepts, you will be fully-equipped to implement a variety of different user interfaces using the Ext JS MVC design pattern. Your journey ends by exploring the production build and deployment process using Maven, Sencha Cmd and GlassFish.
Table of Contents (16 chapters)
14
A. Introducing Spring Data JPA
15
Index

Introducing the persistence.xml file

The persistence.xml file is generated during the reverse engineering process and defines the JPA configuration for a set of entity classes. This file is always located in the META-INF directory at the root of the classpath. Maven projects have a special directory named resources located in the src/main directory, which contains additional resources applicable for building the Java project. The resources directory is automatically copied by Maven to the root of the classpath when building the project. Open the file by double-clicking on it to display the Design view of the file in the editor:

Introducing the persistence.xml file

The Design view contains several properties that are used to configure the persistence unit behavior. We will stick to the simplest settings, but we encourage you to explore the different strategies that may be useful for your own application's needs. For example, projects that require tables to be automatically created will appreciate the Table Generation Strategy...