The web service's CreditCardAuthorizationService.wsdl file contains two sections that enable the web service to work with BPEL process service components:

• partnerLinkType:

  Defines the following characteristics of the conversion between a BPEL process service component and the credit card authorization web service:

  • The role (operation) played by each

  • The portType provided by each for receiving messages within the conversation

• portType:

  A collection of related operations implemented by a participant in a conversation. A port type defines which information is passed back and forth, the form of that information, and so on. A synchronous invocation requires only one port type that both initiates the synchronous process and calls back the client with the response. An asynchronous callback (one in which the reply is not immediate) requires two port types:

  • One to send the request

  • Another to receive the reply when it arrives

  In this example, the portType CreditAuthorizationPort receives the credit card type, credit card number, and purchase amount, and returns the status results.

  The following provides an example of partnerLinkType and portType.

  <plnk:partnerLinkType name="CreditCardAuthorizationService">
       <plnk:role name="CreditAuthorizationPort">
           <plnk:portType name="tns:CreditAuthorizationPort"/>
       </plnk:role>
  </plnk:partnerLinkType>