Book Image

Building Web Apps with Spring 5 and Angular

By : Ajitesh Kumar Shukla
Book Image

Building Web Apps with Spring 5 and Angular

By: Ajitesh Kumar Shukla

Overview of this book

Spring is the most popular application development framework being adopted by millions of developers around the world to create high performing, easily testable, reusable code. Its lightweight nature and extensibility helps you write robust and highly-scalable server-side web applications. Coupled with the power and efficiency of Angular, creating web applications has never been easier. If you want build end-to-end modern web application using Spring and Angular, then this book is for you. The book directly heads to show you how to create the backend with Spring, showing you how to configure the Spring MVC and handle Web requests. It will take you through the key aspects such as building REST API endpoints, using Hibernate, working with Junit 5 etc. Once you have secured and tested the backend, we will go ahead and start working on the front end with Angular. You will learn about fundamentals of Angular and Typescript and create an SPA using components, routing etc. Finally, you will see how to integrate both the applications with REST protocol and deploy the application using tools such as Jenkins and Docker.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Common Hibernate operations


In this section, you will learn some of the common Hibernate operations which are used to process data from the database. 

The following are some of the key operations:

  • Data retrieval
  • Save/persist
  • Update/merge
  • Save or update

Data retrieval

Data retrieval can be done using NamedQuery, Criteria, or a simple Hibernate query mechanism as illustrated in the previous sections. Here are the best practices:

  • Criteria can be used to dynamically create queries at runtime. The usage of Criteria for static queries should be avoided due to the disadvantages, such as cost, associated with translating a JPQL query to SQL every time it is accessed.
  • NamedQuery allows queries to be accessed using alias names while making it easy to manage queries. NamedQuery is the preferred choice for static queries. 

Save/persist operation

Transient instances of persistent classes can be saved in the database using Session APIs such as save or persist. Transient instances are the one which do not have any...