The HelloWorldArtifacts.wsdl file is added a service when you create a BPEL process file. A default service is already defined in this WSDL file. However, if you want to add your own service, follow the steps below:
Open the file HelloWorldArtifacts.wsdl in the HelloWorld project by double-clicking the file. Right-click the WSDL editor and select Add Service. A new service should appear in the editor. Name it HelloWorldProcessService. It has the Port named NewPort. Select it, right-click on it and rename it to HelloWorldProcessPort in the Properties view.
Right-click somewhere in the whitespace of the WSDL editor and select the Add Binding option. A new Binding component will appear in the editor. Name it HelloWorldSOAPBinding. Select it, and in the General tab of the Properties view and select HelloWorld as a port type in the PortType field. Then click on the Generate Binding Content... button to open the Binding Wizard. In the wizard, select SOAP as the Protocol. Finally, click Finish to close the wizard.
Click the HelloWorldProcessPort property in the General section of the Properties view, select HelloWorldSOAPBinding in the Binding combobox. Enter http://localhost:8080/bpel/processes/HelloWorld?wsdl in the Address field.