Description

Introduction

This course focuses on creating RESTful web services using Java EE (J2EE) technologies. Participants will learn how to design and implement web services based on the REST (Representational State Transfer) architecture style, leveraging the power of JAX-RS (Java API for RESTful Web Services) and other Java EE components. The course covers best practices, security considerations, and techniques for integrating RESTful services with J2EE applications.

Prerequisites

• Basic Java Knowledge: Familiarity with Java programming language and object-oriented design.
• Understanding of J2EE Basics: Basic knowledge of Servlets and JSP (JavaServer Pages).
• Web Services Concepts: Understanding of web service principles, including SOAP and REST.
• Familiarity with HTTP Protocol: Basic knowledge of HTTP methods (GET, POST, PUT, DELETE) and status codes.

Table of Contents

1. Introduction to RESTful Web Services
1.1. What are RESTful Web Services?
1.2. Key Principles of REST (Statelessness, Resource Identification, etc.)
1.3. REST vs SOAP: Key Differences
1.4. Benefits of Using REST for Web Services
1.5. Overview of J2EE Web Service Technologies

2. JAX-RS (Java API for RESTful Web Services)
2.1. Introduction to JAX-RS and Its Role in J2EE
2.2. Setting Up JAX-RS in a J2EE Application
2.3. Key Annotations in JAX-RS (e.g., @Path, @GET, @POST, @Produces, @Consumes)
2.4. Designing a Simple RESTful Web Service
2.5. Handling HTTP Methods (GET, POST, PUT, DELETE)

3. Building RESTful Endpoints
3.1. Defining Resources with @Path Annotation
3.2. Returning Data in Different Formats (JSON, XML)
3.3. Path Parameters and Query Parameters in RESTful Services
3.4. Using @Consumes and @Produces for Content Negotiation
3.5. Building Complex RESTful APIs

4. Working with JAX-RS Clients
4.1. Introduction to JAX-RS Client API
4.2. Creating REST Clients to Access Services
4.3. Handling HTTP Responses from a REST Client
4.4. Error Handling and Status Codes in JAX-RS Clients
4.5. Authenticating Requests in JAX-RS Clients

5. Exception Handling and Response Customization
5.1. Handling Exceptions in JAX-RS Services
5.2. Customizing Response Status Codes and Headers
5.3. Using ExceptionMapper for Global Exception Handling
5.4. Returning Custom Error Messages in Responses
5.5. Logging and Debugging RESTful Services

6. Security in RESTful Web Services
6.1. Securing REST APIs with HTTP Basic Authentication
6.2. Using OAuth for Securing REST Services
6.3. Implementing Token-Based Authentication (JWT)
6.4. Using HTTPS for Secure Communication
6.5. Authorization with Role-Based Access Control (RBAC)

7. Integrating RESTful Web Services in J2EE Applications
7.1. Integrating RESTful Services with J2EE Components (Servlets, EJBs)
7.2. Accessing Databases from RESTful Web Services
7.3. Integrating REST APIs with Frontend Applications (Angular, React, etc.)
7.4. Using Dependency Injection in RESTful Services
7.5. Implementing RESTful Web Services in Microservices Architectures

8. Advanced RESTful Web Services Features
8.1. HATEOAS (Hypermedia As The Engine of Application State)
8.2. Pagination in RESTful APIs for Large Datasets
8.3. Caching RESTful Web Service Responses
8.4. Versioning RESTful APIs
8.5. Asynchronous Processing in JAX-RS

9. Testing RESTful Web Services
9.1. Unit Testing RESTful Services with JUnit
9.2. Integration Testing REST APIs with Postman
9.3. Mocking REST Services for Testing
9.4. Using WireMock for Simulating RESTful Services
9.5. Performance Testing RESTful Web Services

10. Deploying and Managing RESTful Web Services in J2EE
10.1. Packaging and Deploying JAX-RS Web Services in J2EE Servers (e.g., WildFly, TomEE)
10.2. Configuring RESTful Services for Production Environments
10.3. Monitoring and Logging REST API Requests and Responses
10.4. Handling Scalability and Load Balancing for REST APIs
10.5. Using API Gateways for Managing RESTful Web Services

11. Conclusion and Best Practices
11.1. Key Takeaways for Building RESTful Web Services
11.2. Best Practices for Designing Scalable and Maintainable REST APIs
11.3. Future Trends in RESTful Web Services and J2EE
11.4. Resources for Continuing Education in RESTful Web Services
11.5. Final Thoughts and Next Steps

Conclusion

By the end of this course, participants will be equipped with the skills to design, implement, and manage RESTful web services using J2EE technologies. They will have a deep understanding of the JAX-RS API, security protocols, exception handling, and advanced features such as HATEOAS and asynchronous processing. This course also covers best practices for integrating RESTful services within J2EE applications, ensuring scalability, security, and ease of maintenance. Students will be ready to apply their knowledge in real-world scenarios, including microservices architectures, cloud deployments, and mobile applications.