Invoking Web Services 6-11
6.3.2 Sample JWS File That Invokes a Web Service
The following sample JWS file, called ClientServiceImpl.java, implements a Web service called ClientService that has an operation that in turn invokes the
echoComplexType operation of a Web service called ComplexService. This
operation has a user-defined data type BasicStruct as both a parameter and a return value. The relevant code is shown in bold and described after the example.
package examples.webservices.service_to_service; import javax.jws.WebService;
import javax.jws.WebMethod; import javax.xml.ws.WebServiceRef;
Import the BasicStruct data type, generated by clientgen and used by the ComplexService Web Service
import examples.webservices.complex.BasicStruct;
Import the JAX-WS stubs generated by clientgen for invoking the ComplexService Web service.
import examples.webservices.complex.ComplexPortType; import examples.webservices.complex.ComplexService;
WebServicename=ClientPortType, serviceName=ClientService, targetNamespace=http:examples.org
public class ClientServiceImpl { Use the WebServiceRef annotation to define a reference to a Web service.
WebServiceRef
ComplexService test;
WebMethod public String callComplexServiceBasicStruct input, String serviceUrl
{ Create a port stub to invoke ComplexService
ComplexPortType port = test.getComplexPortTypePort; Invoke the echoComplexType operation of ComplexService
BasicStruct result = port.echoComplexTypeinput;
System.out.printlnInvoked ComplexPortType.echoComplexType. ; return Invoke went okay Heres the result: + result.getIntValue +
, + result.getStringValue + ; }
}
Follow these guidelines when programming the JWS file that invokes another Web service; code snippets of the guidelines are shown in bold in the preceding example:
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Import any user-defined data types that are used by the invoked Web service. In this example, the ComplexService uses the BasicStruct JavaBean:
import examples.webservices.complex.BasicStruct;
■
Import the JAX-WS interfaces of the ComplexService Web service; the stubs are generated by the cliengen child element of jws:
import examples.webservices.complex.ComplexPortType; import examples.webservices.complex.ComplexService;
■
Define a reference to a Web service and an injection target for it using the WebServiceRef
annotation:
6-12 Getting Started With JAX-WS Web Services for Oracle WebLogic Server
WebServiceRef ComplexService service;
Alternatively, you can create a proxy stub to the ComplexService Web service, as shown below:
ComplexService test = new ComplexService;
■
Return an instance of the ComplexPortType stub implementation by calling the getComplexPortTypePort
operation on the Web service reference: ComplexPortType port = service.getComplexPortTypePort;
■
Invoke the echoComplexType operation of ComplexService using the port you just instantiated:
BasicStruct result = port.echoComplexTypeinput;
6.4 Configuring Web Service Clients
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