Beginning Java EE 6 with GlassFish 3, Second Edition

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CHAPTER 14 ■ SOAP WEB SERVICESPutting It All TogetherBy putting these concepts together, you can write a web service and a web service consumer, and deployand test it all with GlassFish. You should use JAXB and JAX-WS annotations, as well as generate a serviceendpoint interface with the wsimport Maven goal. To write a web service, several steps are needed. I’lldemonstrate these steps by revisiting the CardValidator web service.The CardValidator SOAP web service checks that a credit card is valid. It has one method that takesa CreditCard object as a parameter, applies some algorithm, and returns true if the card is valid, false ifnot. Once this web service is deployed on GlassFish, wsimport is used to generate all the needed artifactsfor the consumer. The consumer can then invoke the web service to validate credit cards.You will use two Maven projects: one to package the web service into a war file (chapter14-service-2.0.war) and another to package the consumer into a jar file (chapter14-consumer-2.0.jar).Writing the CreditCard ClassThe CreditCard class, shown in Listing 14-23, is the POJO used as a parameter to the web servicevalidate() method. SOAP web services exchange XML messages, not Java objects. The CreditCard classis annotated with the JAXB @XmlRootElement annotation to be marshalled into XML so it can be sent in aSOAP request. The CreditCard object has some basic attributes such as the credit card number, theexpiry date (formatted as MM/YY), a credit card type (Visa, Master Card, American Express, etc.), and acontrol number.Listing 14-23. The CreditCard Class with a JAXB Annotation@XmlRootElementpublic class CreditCard {private String number;private String expiryDate;private Integer controlNumber;private String type;}// Constructors, getters, settersWriting the CardValidator SOAP Web ServiceThe CardValidator (see Listing 14-24) is also a POJO with a JAX-WS @WebService annotation. It is not anEJB endpoint as it doesn’t have the @Stateless annotation. The CardValidator web service is a servletendpoint that will be deployed in a war file (chapter14-service-2.0.war). It has a validate() methodthat takes a CreditCard object as a parameter. The algorithm to check whether the card is valid or not isbased on the card number: odd numbers are valid, even numbers are not. The method returns a boolean.442
CHAPTER 14 ■ SOAP WEB SERVICESListing 14-24. The CardValidator Web Service@WebServicepublic class CardValidator {public boolean validate(CreditCard creditCard) {Character lastDigit = creditCard.getNumber().charAt(creditCard.getNumber().length() - 1);}}if (Integer.parseInt(lastDigit.toString()) % 2 != 0) {return true;} else {return false;}For simplicity, no extra Java-to-WSDL mapping is used, so there are no @WebMethod, @WebResult, or@WebParam annotations, allowing you to see how easy it is to write a web service using all the defaultmapping rules.Compiling and Packaging with MavenThe CardValidator web service (shown previously in Listing 14-24) needs to be compiled and packagedin a war file ( war ). The pom.xml file (see Listing 14-25) declares the jaxws-rtdependency to use the 2.2 version of JAX-WS. Java SE 6 comes with a JAXB and JAX-WS implementation.Specifying the 1.6 version in the maven-compiler-plugin should be enough as you explicitly specify youwant to use Java SE 6 ( 1.6 ). But if you want to control your dependency versions andabsolutely want JAX-WS 2.2, it’s better to explicitly add the jaxws-rt dependency to the project.Listing 14-25. The pom.xml File to Compile and Package the Web Service4.0.0com.apress.javaee6chapter14-service2.0warcom.sun.xml.wsjaxws-rt443
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The EXPERT’s VOIce ® in Java tm
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Beginning Java EE 6 Platform with G
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Contents at a Glance■Foreword ...
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■ CONTENTSSummary ...............
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■ CONTENTSStateful . ............
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■ CONTENTSFrom the Web to Web Ser
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About the Author■ Antonio Goncalv
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AcknowledgmentsWriting a book about
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■ PREFACECONTENTSChapter 1 briefl
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C H A P T E R 1■ ■ ■Java EE 6
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CHAPTER 1 ■ JAVA EE 6 AT A GLANCE
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C H A P T E R 4■ ■ ■Managing
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C H A P T E R 5■ ■ ■Callbacks
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C H A P T E R 7■ ■ ■Session B
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C H A P T E R 8■ ■ ■Callbacks
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C H A P T E R 9■ ■ ■Transacti
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C H A P T E R 11■ ■ ■Pages an
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