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Building Web Apps with Spring 5 and Angular

You're reading from   Building Web Apps with Spring 5 and Angular Modern end-to-end web application development

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Product type Paperback
Published in Aug 2017
Publisher Packt
ISBN-13 9781787284661
Length 370 pages
Edition 1st Edition
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Author (1):
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 Shukla Shukla
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Shukla
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Table of Contents (18) Chapters Close

Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Introduction to Spring Web Framework FREE CHAPTER 2. Preparing the Spring Web Development Environment 3. Data Access Layer with Spring and Hibernate 4. Testing and Running Spring Web App 5. Securing Web App with Spring Security 6. Getting Started with Angular 7. Creating SPA with Angular and Spring 5 8. Unit Testing with Angular Apps 9. Securing an Angular App 10. Integrating Angular App with Spring Web APIs 11. Deploying the Web Application

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...

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