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Jakarta EE

Player software	Java
Programming language(s)	Java
Application(s)	Application server
Status	Active
License	Eclipse Public License or GNU General Public License w/Classpath exception
Website	jakarta.ee

Java platform editions
Java Card Java ME (Micro Edition) Java SE (Standard Edition) Jakarta EE (Enterprise Edition) JavaFX (bundled in Oracle's JDK from versions 8 to 10 but separately since 11) PersonalJava (Discontinued)
v t e

Jakarta EE, formerly Java Platform, Enterprise Edition (Java EE) and Java 2 Platform, Enterprise Edition (J2EE), is a set of specifications, extending Java SE with specifications for enterprise features such as distributed computing and web services. Jakarta EE applications are run on reference runtimes, which can be microservices or application servers, which handle transactions, security, scalability, concurrency and management of the components they are deploying.

Jakarta EE is defined by its specification. The specification defines APIs (application programming interface) and their interactions. As with other Java Community Process specifications, providers must meet certain conformance requirements in order to declare their products as Jakarta EE compliant.

Examples of contexts in which Jakarta EE referencing runtimes are used are: e-commerce, accounting, banking information systems.

History

The platform was known as Java 2 Platform, Enterprise Edition or J2EE from version 1.2, until the name was changed to Java Platform, Enterprise Edition or Java EE in version 1.5.

Java EE was maintained by Oracle under the Java Community Process. On September 12, 2017, Oracle Corporation announced that it would submit Java EE to the Eclipse Foundation. The Eclipse top-level project has been named Eclipse Enterprise for Java (EE4J). The Eclipse Foundation could not agree with Oracle over the use of javax and Java trademarks. Oracle owns the trademark for the name "Java" and the platform was renamed from Java EE to Jakarta EE. The name refers to the largest city on the island of Java and also the capital of Indonesia, Jakarta. The name should not be confused with the former Jakarta Project which fostered a number of current and former Java projects at the Apache Software Foundation.

Specifications

Jakarta EE includes several specifications that serve different purposes, like generating web pages, reading and writing from a database in a transactional way, managing distributed queues.

The Jakarta EE APIs include several technologies that extend the functionality of the base Java SE APIs, such as Jakarta Enterprise Beans, connectors, servlets, Jakarta Server Pages and several web service technologies.

Web specifications

• Jakarta Servlet: defines how to manage HTTP requests, in a synchronous or asynchronous way. It is low level and other Jakarta EE specifications rely on it;
• Jakarta WebSocket: API specification that defines a set of APIs to service WebSocket connections;
• Jakarta Faces: a technology for constructing user interfaces out of components;
• Jakarta Expression Language (EL) is a simple language originally designed to satisfy the specific needs of web application developers. It is used specifically in Jakarta Faces to bind components to (backing) beans and in Contexts and Dependency Injection to named beans, but can be used throughout the entire platform.

Web service specifications

• Jakarta RESTful Web Services provides support in creating web services according to the Representational State Transfer (REST) architectural pattern;
• Jakarta JSON Processing is a set of specifications to manage information encoded in JSON format;
• Jakarta JSON Binding provides specifications to convert JSON information into or from Java classes;
• Jakarta XML Binding allows mapping XML into Java objects;
• Jakarta XML Web Services can be used to create SOAP web services.

Enterprise specifications

• Jakarta Activation (JAF) specifies an architecture to extend component Beans by providing data typing and bindings of such types.
• Jakarta Contexts and Dependency Injection (CDI) is a specification to provide a dependency injection container;
• Jakarta Enterprise Beans (EJB) specification defines a set of lightweight APIs that an object container (the EJB container) will support in order to provide transactions (using JTA), remote procedure calls (using RMI or RMI-IIOP), concurrency control, dependency injection and access control for business objects. This package contains the Jakarta Enterprise Beans classes and interfaces that define the contracts between the enterprise bean and its clients and between the enterprise bean and the ejb container.
• Jakarta Persistence (JPA) are specifications about object-relational mapping between relation database tables and Java classes.
• Jakarta Transactions (JTA) contains the interfaces and annotations to interact with the transaction support offered by Jakarta EE. Even though this API abstracts from the really low-level details, the interfaces are also considered somewhat low-level and the average application developer in Jakarta EE is either assumed to be relying on transparent handling of transactions by the higher level EJB abstractions, or using the annotations provided by this API in combination with CDI managed beans.
• Jakarta Messaging (JMS) provides a common way for Java programs to create, send, receive and read an enterprise messaging system's messages.

Other specifications

• Jakarta Validation: This package contains the annotations and interfaces for the declarative validation support offered by the Jakarta Validation API. Jakarta Validation provides a unified way to provide constraints on beans (e.g. Jakarta Persistence model classes) that can be enforced cross-layer. In Jakarta EE, Jakarta Persistence honors bean validation constraints in the persistence layer, while JSF does so in the view layer.
• Jakarta Batch provides the means for batch processing in applications to run long running background tasks that possibly involve a large volume of data and which may need to be periodically executed.
• Jakarta Connectors is a Java-based tool for connecting application servers and enterprise information systems (EIS) as part of enterprise application integration (EAI). This is a low-level API aimed at vendors that the average application developer typically does not come in contact with.

Web profile

In an attempt to limit the footprint of web containers, both in physical and in conceptual terms, the web profile was created, a subset of the Jakarta EE specifications. The Jakarta EE web profile comprises the following:

Certified referencing runtimes

Although by definition all Jakarta EE implementations provide the same base level of technologies (namely, the Jakarta EE spec and the associated APIs), they can differ considerably with respect to extra features (like connectors, clustering, fault tolerance, high availability, security, etc.), installed size, memory footprint, startup time, etc.

Jakarta EE

Java EE

Code sample

The code sample shown below demonstrates how various technologies in Java EE 7 are used together to build a web form for editing a user.

In Jakarta EE a (web) UI can be built using Jakarta Servlet, Jakarta Server Pages (JSP), or Jakarta Faces (JSF) with Facelets. The example below uses Faces and Facelets. Not explicitly shown is that the input components use the Jakarta EE Bean Validation API under the covers to validate constraints.

<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html" xmlns:f="http://xmlns.jcp.org/jsf/core">
    <f:metadata>
        <f:viewParam name="user_id" value="#{userEdit.user}" converter="#{userConvertor}" />
    </f:metadata>
    <h:body>
        <h:messages />
        <h:form>
            <h:panelGrid columns="2">
                <h:outputLabel for="firstName" value="First name" />
                <h:inputText id="firstName" value="#{userEdit.user.firstName}" label="First name" />
                <h:outputLabel for="lastName" value="Last name" />
                <h:inputText id="lastName" value="#{userEdit.user.lastName}" label="Last name" />
                <h:commandButton action="#{userEdit.saveUser}" value="Save" />
            </h:panelGrid>
        </h:form>
    </h:body>
</html>

Example Backing Bean class

To assist the view, Jakarta EE uses a concept called a "Backing Bean". The example below uses Contexts and Dependency Injection (CDI) and Jakarta Enterprise Beans (EJB).

@Named
@ViewScoped
public class UserEdit {
    private User user;
    @Inject
    private UserDAO userDAO;
    public String saveUser() {
        userDAO.save(this.user);
        addFlashMessage("User " + this.user.getId() + " saved");
        return "users.xhtml?faces-redirect=true";
    }
    public void setUser(User user) {
        this.user = user;
    }
    public User getUser() {
        return user;
    }
}

Example Data Access Object class

To implement business logic, Jakarta Enterprise Beans (EJB) is the dedicated technology in Jakarta EE. For the actual persistence, JDBC or Jakarta Persistence (JPA) can be used. The example below uses EJB and JPA. Not explicitly shown is that JTA is used under the covers by EJB to control transactional behavior.

@Stateless
public class UserDAO {
    @PersistenceContext
    private EntityManager entityManager;
    public void save(User user) {
        entityManager.persist(user);
    }
    public void update(User user) {
        entityManager.merge(user);
    }
    public List<User> getAll() {
        return entityManager.createNamedQuery("User.getAll", User.class)
                            .getResultList();
    }
}

Example Entity class

For defining entity/model classes Jakarta EE provides the Jakarta Persistence (JPA), and for expressing constraints on those entities it provides the Bean Validation API. The example below uses both these technologies.

@Entity
public class User {
    @Id
    @GeneratedValue(strategy = IDENTITY)
    private Integer id;
    @Size(min = 2, message="First name too short")
    private String firstName;
    @Size(min = 2, message="Last name too short")
    private String lastName;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

See also

• Canigó (framework)
• Deployment descriptor
• Java BluePrints
• Java Research License
• Sun Community Source License
• Sun Java System Portal Server
• Web container
• J2ME

References

1. "Differences between Java EE and Java SE - Your First Cup: An Introduction to the Java EE Platform". Docs.oracle.com. 2012-04-01. Retrieved 2012-07-18.
2. "Java EE Overview". Oracle Corporation. Retrieved February 26, 2017.
3. Waters, John K. (September 12, 2017). "Java EE Is Moving to the Eclipse Foundation". ADTmag. Retrieved 2017-09-13.
4. Beaton, Wayne. "EE4J FAQ". Eclipse Foundation.
5. Milinkovich, Mike (May 3, 2019). "Update on Jakarta EE Rights to Java Trademarks". Blog. Life at Eclipse. Retrieved 2024-07-25.
6. Chirgwin, Richard (March 4, 2018). "Java EE renamed 'Jakarta EE' after Big Red brand spat". Software. The Register. Retrieved 19 March 2018.
7. Vaughan-Nichols, Steven J. (March 5, 2018). "Good-bye JEE, hello Jakarta EE". Linux and Open Source. ZDNet. Retrieved 2020-07-10.
8. Tijms, Arjan (February 27, 2020). "Transition From Java EE to Jakarta EE". Java Magazine. blogs.oracle.com. Retrieved 2024-07-25.
9. "Jakarta EE Releases". Jakarta EE. Eclipse Foundation. Retrieved 2024-07-17.
10. Obradovic, Tanja; Grimstad, Ivar (2022-09-22). "The Eclipse Foundation's Jakarta EE Working Group Releases Jakarta EE 10 to Usher in the Era of Cloud Native Java". News. Jakarta EE (Press release). Eclipse Foundation. Retrieved 2024-07-17.
11. Obradovic, Tanja; Grimstad, Ivar (2021-05-25). "The Jakarta EE Working Group Releases Jakarta EE 9.1 as Industry Continues to Embrace Open Source Enterprise Java". News. Jakarta EE (Press release). Eclipse Foundation. Retrieved 2022-03-05.
12. Mmayel, Shabnam; Obradovic, Tanja (2020-12-08). "Jakarta EE 9 Released!". News. Jakarta EE (Press release). Eclipse Foundation. Retrieved 2022-03-05.
13. Mmayel, Shabnam; Obradovic, Tanja (2019-09-10). "Jakarta EE 8 Released!". News. Jakarta EE (Press release). Eclipse Foundation. Retrieved 2022-03-05.
14. Krill, Paul (November 21, 2003). "J2EE 1.4 spec certified". Software Development. InfoWorld. Retrieved 2022-03-05.
15. Copeland, Lee (September 24, 2001). "Sun unveils J2EE 1.3". Software Development. Computerworld. Retrieved 2022-03-05.
16. "JSR 316: Java Platform, Enterprise Edition 6 (Java EE 6) Specification". Java Community Process. Oracle Corporation. Retrieved 2022-03-05.
17. "JSR 342: Java Platform, Enterprise Edition 7 (Java EE 7) Specification". Java Community Process. Oracle Corporation. Retrieved 2022-03-05.
18. "Java Platform, Enterprise Edition 8 (Java EE 8) Web Profile Specification" (PDF). GitHub. Oracle Corporation. Archived (PDF) from the original on 2022-10-09. Retrieved 2022-02-05.
19. "Web Profile Definition". Jakarta EE WebProfile. 8. Jakarta EE. Eclipse Foundation. Retrieved 2022-03-05.
20. "Web Profile Definition". Jakarta EE WebProfile. 9. Jakarta EE. Eclipse Foundation. Retrieved 2022-03-05.
21. "Web Profile Definition". Jakarta EE WebProfile. 9.1. Jakarta EE. Eclipse Foundation. Retrieved 2022-03-05.
22. "Web Profile Definition". Jakarta EE WebProfile. 10. Jakarta EE. Eclipse Foundation. Retrieved 2022-09-27.
23. "Jakarta EE Compatible Products". Jakarta.ee.
24. "Jakarta EE 9 Compatible Products". Jakarta.ee.
25. "Jakarta EE 8 Compatible Products". Jakarta.ee.
26. "Jakarta EE 10 Platform and MicroProfile 6 in Open Liberty 23.0.0.1-beta". openliberty.io.
27. ^ "Jakarta EE 10, MicroProfile 6, and Java SE 20 support in Open Liberty 23.0.0.3". openliberty.io.
28. "Apache TomEE". tomee.apache.org. Retrieved 2024-01-08.
29. ^ "Java EE Compatibility". www.oracle.com. Retrieved 2018-08-05.
30. ^ "Java EE Compatibility".
31. ^ "Comparing GlassFish Open Source Edition versions 2.x and 3.0.x". Archived from the original on 2012-12-20.
32. "Java EE Compatibility". Java.sun.com. 2010-09-07. Retrieved 2012-07-18.
33. "Oracle Weblogic Server 14.1.1". www.oracle.com.
34. "Oracle Weblogic Server 12.1.1". www.oracle.com.
35. Lyons, Will; Humphrey, Pieter (2011). "Oracle Web Logic Server 12c: Developing Modern, Lightweight Java EE 6 Applications" (PDF). Archived from the original (PDF) on 2011-12-15. Retrieved 2011-12-03.
36. "Java EE Compatibility". www.oracle.com.
37. "JBoss AS 7.1.0.Final "Thunder" released - Java EE 6 Full Profile certified! | My Wiki | Planet JBoss Community". Planet.jboss.org. 2012-02-17. Retrieved 2012-07-18.
38. "JBoss Application Server - JBoss Community".
39. "JBoss Application Server - JBoss Community".
40. "Java EE Compatibility".
41. "JBoss AS is now EE5 certified!". 15 September 2008. Archived from the original on 20 September 2008. Retrieved 7 August 2016.
42. "Red Hat JBoss Enterprise Application Platform 7.2 Availability".
43. Business Wire (2012-06-20). "Red Hat Launches JBoss Enterprise Application Platform 6 to Help Enterprises Move Application Development and Deployment to the Cloud". Business Wire. Retrieved 2012-07-18. {{cite web}}: |author= has generic name (help)
44. "What's new in WebSphere Application Server V8". Ibm.com. Retrieved 2012-07-18.
45. ^ "IBM WebSphere Application Server Liberty delivers the first production-ready, Java EE 8-compatible application server and broadens support for Spring Boot applications". IBM. 10 July 2018. Retrieved 12 July 2018.
46. "Java EE 7 - Tested Configurations- IBM WebSphere Application Server Liberty Profile". Oracle.com.
47. "Java EE 7 has landed in WAS Liberty - WASdev". 25 June 2015.
48. "IBM Java EE 6 Web Profile Tested Configurations".
49. "Apache Geronimo : Index". geronimo.apache.org. January 25, 2010.
50. "Apache Geronimo fully certified for Java EE 6 - The H Open: News and Features". H-online.com. 2011-11-14. Archived from the original on 20 April 2012. Retrieved 2012-07-18.
51. "Tested Configurations, Java EE 6 - TMAX JEUS 7". Oracle.com. 2010-09-07. Retrieved 2012-07-18.
52. "Java EE6 Web Application Server, WAS Software". Us.tmaxsoft.com. Archived from the original on 2012-07-02. Retrieved 2012-07-18.
53. "Java EE 6 - Tested Configurations, Java EE 6 - Hitachi uCosminexus Application Server v9.0". Oracle.com.
54. "Fujitsu Interstage Application Server powered by Windows Azure". Archived from the original on August 10, 2011.
55. "Tested Configurations, Java EE6 - Fujitsu Interstage". Oracle.com. 2010-09-07. Retrieved 2012-07-18.
56. "Fujitsu Releases Interstage Application Server V10.1". Fujitsu.
57. "NEC WebOTX Application Server V9.x Certification".
58. "Apache TomEE". Openejb.apache.org. Retrieved 2012-07-18.
59. "MarketWatch.com". MarketWatch.com. Retrieved 2012-07-18.
60. TomEE, Apache. "Apache TomEE 7.0.1".
61. "Resin Application Server Java EE 6 Web Profile" (PDF). caucho.com. 2011. Archived (PDF) from the original on 2022-10-09.
62. "Please Welcome Siwpas as Java EE Certified Option!". Oracle.com. Retrieved 2015-12-07.
63. "JOnAS 5.3.0 RC1 released". jonas.ow2.org. 2013-01-07. Archived from the original on 2013-10-15. Retrieved 2014-02-25.
64. "SAP NetWeaver Cloud Java EE 6 Web Profile Certified! (The Aquarium)".
65. "SAP Software Solutions - Business Applications and Technology". Archived from the original on 2009-12-07. Retrieved 2010-05-03.

External links

• Official website
  • Jakarta EE Compatible Products: Enterprise Java Application and Web Servers - Eclipse Foundation
• The Jakarta EE Tutorial
• First Cup of Jakarta EE Tutorial: An Introduction to Jakarta EE
• Java Platform, Enterprise Edition (Java EE), Oracle Technology Network
• Jakarta EE official YouTube channel

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