7. Developing CRUD Operations and Validations
by Geoffroy Warin, Alex Bretet, Hamidreza Sattari, Shameer Kunjumohamed
Spring MVC: Designing Real-World Web Applications
- Spring MVC: Designing Real-World Web Applications
- Table of Contents
- Spring MVC: Designing Real-World Web Applications
- Spring MVC: Designing Real-World Web Applications
- Credits
- Preface
- I. Module 1
- 1. Getting Started with Spring Core
- The Spring landscape
- Design concepts behind Spring Framework
- Setting up the development environment
- Your first Spring application
- Dependency Injection
- Beans in detail
- Bean definition
- Instantiating beans
- Injecting bean dependencies
- Constructor-based or setter-based DI – which is better?
- Cleaner bean definitions with namespace shortcuts
- Wiring a List as a dependency
- Wiring a Map as a dependency
- Autowiring dependencies
- Bean scoping
- Dependency Injection with scoped beans
- Creating a custom scope
- Hooking to bean life cycles
- Container-level default-init-method and default-destroy-method
- Working with bean definition profiles
- Injecting properties into the Spring environment
- Externalizing properties with PropertyPlaceholderConfigurer
- Handling resources
- Spring Expression Language
- Aspect Oriented Programming
- Testing with Spring
- Summary
- 2. Building the Web Layer with Spring Web MVC
- Features of Spring MVC
- The Model-View-Controller pattern
- Your first Spring MVC application
- Setting up a Spring MVC application
- The architecture and components of Spring MVC
- DispatcherServlet explained
- Controllers in detail
- Mapping request URLs with @RequestMapping
- URI template patterns with the @PathVariable annotation
- Binding parameters with the @RequestParam annotation
- Request handler method arguments
- Request handler method return types
- Setting Model attributes
- Building RESTful services for JSON and XML media
- Building a RESTful service with RestController
- Asynchronous request processing in Spring MVC
- Working with views
- Spring and Spring form tag libraries
- Composing a form in JSP
- Validating forms
- Handling file uploads
- Resolving Thymeleaf views
- More view technologies
- Summary
- 3. Accessing Data with Spring
- Configuring DataSource
- Using embedded databases
- Handling exceptions in the Spring Data layer
- DAO support and @Repository annotation
- Spring JDBC abstraction
- Spring Data
- Spring Transaction support
- Relevance of Spring Transaction
- Summary
- 4. Understanding WebSocket
- 5. Securing Your Applications
- 6. Building a Single-Page Spring Application
- The motivations behind SPAs
- SPAs explained
- Introducing Ember.js
- The anatomy of an Ember application
- Working with Ember CLI
- Understanding the Ember object model
- Working with collections
- Building UI templates using Handlebars
- Handling routes
- Handling UI behavior using components
- Persisting data with Ember Data
- Building a Taskify application
- Building the API server app
- Building the Taskify Ember app
- Summary
- 7. Integrating with Other Web Frameworks
- 1. Getting Started with Spring Core
- II. Module 2
- 1. Setup Routine for an Enterprise Spring Application
- Introduction
- Installing Eclipse for JEE Developers and Java SE 8
- Configuring Eclipse for Java 8, Maven 3, and Tomcat 8
- Defining the project structure with Maven
- Installing Spring, Spring MVC, and a web structure
- 2. Designing a Microservice Architecture with Spring MVC
- Introduction
- Configuring a controller with simple URL mapping
- Configuring a fallback controller using ViewResolver
- Setting up and customizing a responsive single page webdesign with Bootstrap
- Displaying a model in the View, using the JSTL
- Defining a common WebContentInterceptor
- Designing a client-side MVC pattern with AngularJS
- 3. Working with Java Persistence and Entities
- 4. Building a REST API for a Stateless Architecture
- Introduction
- Binding requests and marshalling responses
- Configuring content-negotiation (JSON, XML, and so on)
- Adding pagination, filters, and sorting capabilities
- Handling exceptions globally
- Documenting and exposing an API with Swagger
- 5. Authenticating with Spring MVC
- Introduction
- Configuring Apache HTTP to proxy your Tomcat(s)
- Adapting users and roles to Spring Security
- Authenticating over a BASIC scheme
- Authenticating with a third-party OAuth2 scheme
- Storing credentials in a REST environment
- Authorizing on services and controllers
- 6. Implementing HATEOAS
- 7. Developing CRUD Operations and Validations
- Introduction
- Extending REST handlers to all HTTP methods
- Validating resources using bean validation support
- Internationalizing messages and contents for REST
- Validating client-side forms with HTML5 AngularJS
- 8. Communicating Through WebSockets and STOMP
- Introduction
- Streaming social events with STOMP over SockJS
- Using RabbitMQ as a multiprotocol message broker
- Stacking and consuming tasks with RabbitMQ and AMQP
- Securing messages with Spring Session and Redis
- Getting ready
- How to do it…
- How it works...
- There's more…
- See also
- 9. Testing and Troubleshooting
- Introduction
- Automating Database Migrations with FlyWay
- Unit testing with Mockito and Maven Surefire
- Integration testing with Cargo, Rest-assured, and Maven failsafe
- Injecting Spring Beans into integration tests
- Modern application Logging with Log4j2
- Getting ready
- How to do it…
- How it works...
- There is more…
- Automatic configuration
- Official documentation
- Interesting Redis Appender implementation
- III. Module 3
- 1. Mastering the MVC Architecture
- 2. Handling Forms and Complex URL Mapping
- 3. File Upload and Error Handling
- 4. Crafting a RESTful Application
- 5. Securing Your Application
- 6. Leaving Nothing to Luck – Unit Tests and Acceptance Tests
- 7. Optimizing Your Requests
- 8. Deploying Your Web Application to the Cloud
- 9. Beyond Spring Web
- A. Bibliography
- Index
- 1. Setup Routine for an Enterprise Spring Application
Until now, we have seen how to build the read-only HTTP methods of an API. These methods in Spring MVC Controllers required you to master, or at least understand the presentation of a few techniques. Developing non-readonly HTTP methods raises a new set of underlying topics. Each of these topics has a direct impact on the customer experience and therefore each of them is important. We introduce the following four recipes as a frame to cover the subject:
- Extending REST handlers to all HTTP methods
- Validating resources using bean validation support
- Internationalizing messages and contents for REST
- Validating client-side forms with HTML5 and AngularJS
Developing CRUD operations and validations at this stage turns out to be one of the topics with the widest spectrum.
Our application will be transformed in many ways, from the transaction management standardisation to the internationalization of errors (and content), passing through the REST handlers, HTTP compliance.
In line with the previous chapters and with the global strategy of this book, we are focusing on how Spring MVC plays a key role in today's and tomorrow's best practices in regards to scalability and Microservices communications. It is a hard choice to decide skipping bits, but the Framework keeps adapting itself to new designs and challenges. This book tries to present a consistent integration of Spring MVC in a modern, sustainable, and scalable application.
Four recipes are presented here. The first one transforms two controllers to support the CRUD operations for their respective resources. Doing so requires a review of the database transactions and a review of the HTTP specification.
This chapter presents two validation strategies supported by Spring MVC. Since validation errors are often meant to be rendered in more than one language, we have made sure that our application supports internationalization. We briefly see how AngularJS can be used in this perspective and how it can be used to process frontend validations that are always necessary to constrain the customer experience into the reality of the business-specific data management.
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