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Java EE 8 Application Development

You're reading from   Java EE 8 Application Development Develop Enterprise applications using the latest versions of CDI, JAX-RS, JSON-B, JPA, Security, and more

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788293679
Length 372 pages
Edition 1st Edition
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Author (1):
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David R. Heffelfinger David R. Heffelfinger
Author Profile Icon David R. Heffelfinger
David R. Heffelfinger
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Table of Contents (15) Chapters Close

Preface 1. Introduction to Java EE FREE CHAPTER 2. JavaServer Faces 3. Object Relational Mapping with the Java Persistence API 4. Enterprise JavaBeans 5. Contexts and Dependency Injection 6. JSON Processing with JSON-P and JSON-B 7. WebSocket 8. Java Messaging Service 9. Securing Java EE Applications 10. RESTful Web Services with JAX-RS 11. Microservices Development with Java EE 12. Web Services with JAX-WS 13. Servlet Development and Deployment 14. Configuring and Deploying to GlassFish

Exposing EJBs as web services

In addition to creating web services as described in the previous section, public methods of stateless session beans can easily be exposed as web services by simply adding an annotation to the EJB class. The following example illustrates how to do this:

package net.ensode.javaee8book.ejbws; 
 
import javax.ejb.Stateless; 
import javax.jws.WebService; 
 
@Stateless 
@WebService 
public class DecToHexBean { 
 
  public String convertDecToHex(int i) { 
    return Integer.toHexString(i); 
  } 
} 

As we can see, the only thing we need to do to expose a stateless session bean's public methods is to decorate its class declaration with the @WebService annotation. Needless to say, since the class is a session bean, it also needs to be decorated with the @Stateless annotation.

Just like regular stateless session beans, the ones whose methods are exposed...

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