Capabilities

Jakarta EE, formerly known as Java Platform, Enterprise Edition (Java EE) and before that as Java 2 Platform, Enterprise Edition (J2EE), is a set of specifications that extends the Java SE (Standard Edition) with specifications for enterprise features such as distributed computing and web services. Jakarta EE provides a standardized, portable, and secure platform for developing and deploying enterprise-level Java applications.

Key Features and Components of Jakarta EE:

1. Servlets: Jakarta EE includes the Servlet API, which allows developers to create web applications in Java. Servlets handle HTTP requests and responses, making it possible to build dynamic web pages and web services.

2. JSP (JavaServer Pages): Jakarta EE supports JSP, which is a technology for creating dynamic web pages using Java. JSP pages are compiled into servlets by the server.

3. Enterprise JavaBeans (EJB): EJB is a component architecture for building distributed, transactional, and scalable enterprise applications. Jakarta EE provides specifications for session beans, message-driven beans, and entity beans.

4. JMS (Java Message Service): Jakarta EE includes the JMS API, which allows applications to send and receive messages asynchronously. It's commonly used in messaging systems and enterprise integration.

5. JTA (Java Transaction API): Jakarta EE provides JTA for managing distributed transactions across multiple resources, ensuring data consistency and reliability.

6. JPA (Java Persistence API): JPA is a standard for object-relational mapping in Java. It allows developers to map Java objects to relational database tables and perform database operations using Java objects.

7. JCA (Java Connector Architecture): Jakarta EE includes JCA, which is a framework for integrating with enterprise information systems and external resources such as databases and messaging systems.

8. Web Services: Jakarta EE supports the development of web services using technologies like JAX-RS (for RESTful services) and JAX-WS (for SOAP-based services). It enables interoperable communication between different systems.

9. Security: Jakarta EE includes security features for authentication, authorization, and data protection. It provides mechanisms for securing web applications and services.

10. CDI (Contexts and Dependency Injection): CDI is a programming model for building enterprise beans in a decoupled and flexible manner. It allows for the injection of dependencies and context management.

11. Batch Processing: Jakarta EE provides specifications for batch processing, making it possible to execute batch jobs in a managed and scalable environment.

Use Cases for Jakarta EE:

1. Enterprise Applications: Jakarta EE is commonly used to build large-scale, mission-critical enterprise applications, including customer relationship management (CRM) systems, financial applications, and more.

2. Web Applications: It's suitable for developing web applications of various sizes and complexities, from simple websites to complex e-commerce platforms.

3. Middleware: Jakarta EE is used in middleware solutions like application servers to host and manage enterprise applications and services.

4. Integration: It's often used for integrating different systems within an organization, including databases, messaging systems, and legacy applications.

5. Web Services: Jakarta EE is used to create web services, both RESTful and SOAP-based, for communication between applications and services.

Jakarta EE is an essential platform for the development of enterprise-level Java applications. It provides a set of standardized APIs and specifications that enable developers to build scalable, reliable, and secure applications for a wide range of business needs. Jakarta EE is developed under the Eclipse Foundation as an open-source project.