JAX-WS simplifies application development through support of a standard, annotation-based model to develop Web Service applications and clients. It replaces remote procedure calls defined by JAX-RPC and allows developers to write message-oriented and RPC-oriented web services. JAX-WS uses platform-independent technologies like HTTP, SOAP and WSDL and provides tools for generating artifacts and importing WSDL definitions.

1. JAX-WS Francesco Ierna

2. JAX-WS JAX-WS : is a programming model that simplifies application development through support of a standard, annotation-based model to develop Web Service applications and clients. Replace the remote procedures call programming as defined by JAX-RPC

3. Both servlet endpoints and EJB endpoints can have an object implementing the WebServiceContext interface injected using the @Resource annotation

4. Allows developers to write message-oriented as well as RPC-oriented web services

5. With JAX-WS, the developer does not generate or parse SOAP messages

6. the platform independence of the Java programming language beacuse jax-ws uses techology definined by the W3C : HTTP, SOAP and WSDL

7. Overview

8. Features Features : Better platform indipendent

9. Annotations : supports the use of annotations. Sempliies development of web services

10. Much easier to expose method as web services

11. Webservices.xml is optional and overrides all the information in a file class java Called both synchronously and asynchronously Asynchronously : Future<?> getCreditScoreAsync(Customer customer, AsyncHandler<Score> handler); Using resource injection : The application server also supports the usage of the @Resource or @WebServiceRef annotation to declare JAX-WS managed clients and to request injection of JAX-WS services and ports

12. Data Binding : JAX-WS leverages the Java Architecture for XML Binding (JAXB) 2.1 API and tools as the binding technology for mappings between Java objects and XML documents.

13. Support for MTOM : can send binary attachments such as images or files along with Web services requests

14. Support for SOAP 1.2 : JAX-WS supports both SOAP 1.1 and SOAP 1.2

15. Development tools : JAX-WS provides the wsgen and wsimport command-line tools for generating portable artifacts for JAX-WS Web services

16. Support for WS-Addressing (JAX-WS 2.1) : The new API enables you to create, transmit and use endpoint references to target a specific Web service endpoint

17. Support for JAX-WS 2.1 features : JAX-WS 2.1 introduces the concept of features as a way to programmatically control certain functions or behaviors

18. Development MessageContext Using a WebServiceContext object, the endpoint have access to basic security mechanisms of JavaEE

19. Both servlet endpoints and EJB endpoints can have an object implementing the WebServiceContext interface injected using the @Resource annotation

20. Development Java Class : @WebServices on java class No @WebMethod -> all method expose to be a web services method

21. @WebMethod -> only the methods annotates with @WebMethod will be exposed to be a web services method

22. We can exclude some methods by annotating the method with the property exclude setted to true into the @WebMethod annotation Interface Is mapped in portType within the WSDL file Method Is mapped to a wsdl:operation element in the corrisponding wsdl:portType plus one or more wsdl:message elements

23. Development Example JAX-WS HelloWorld SEI: @WebService(name = &quot;HelloWorld&quot;, targetNamespace = &quot;urn:samples.ibm.com/HelloWorld&quot;) public interface HelloWorld { @WebMethod (action = &quot;urn:samples.ibm.com/HelloWorld/hello&quot;) @WebResult (name = &quot;response&quot;, targetNamespace = &quot;&quot;) @RequestWrapper (localName = &quot; hello &quot;, targetNamespace = &quot;urn:samples.ibm.com/HelloWorld&quot;, className = &quot;com.ibm.samples.helloworld.Hello&quot;) @ResponseWrapper (localName = &quot; helloResponse &quot;, targetNamespace = &quot;urn:samples.ibm.com/HelloWorld&quot;, className = &quot;com.ibm.samples.helloworld.HelloResponse&quot;) public String hello( @WebParam(name = &quot;name&quot;, targetNamespace = &quot;&quot;) String name);} <wsdl:types> <xsd:schema targetNamespace=&quot;urn:helloWorld/sample/ibm/com&quot;...> <xsd:element name=&quot;hello&quot; type=&quot;xsd:string&quot;/> <xsd:element name=&quot;helloResponse&quot; type=&quot;xsd:string&quot;/> </xsd:schema> </wsdl:types> <wsdl:message name=&quot; helloRequestMsg &quot;> <wsdl:part element=&quot;tns:hello&quot; name=&quot;helloParameters&quot; /> </wsdl:message> <wsdl:message name=&quot; helloResponseMsg &quot;> <wsdl:part element=&quot;tns:helloResponse&quot; name=&quot;helloResult&quot; /> </wsdl:message>

24. WSDL Services