Loan Approval Example

<process name="loanApprovalProcess" 
         targetNamespace="http://acme.com/loanprocessing" 
         xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
         xmlns:lns="http://loans.org/wsdl/loan-approval"
         suppressJoinFailure="yes">

   <partnerLinks>
      <partnerLink name="customer" 
               partnerLinkType="lns:loanPartnerLinkType"
               myRole="loanService"/>
      <partnerLink name="approver" 
               partnerLinkType="lns:loanApprovalLinkType"
               partnerRole="approver"/>
      <partnerLink name="assessor" 
               partnerLinkType="lns:riskAssessmentLinkType"
               partnerRole="assessor"/>
   </partnerLinks>

   <variables>
     <variable name="request" 
                messageType="lns:creditInformationMessage"/>
     <variable name="risk" 
                messageType="lns:riskAssessmentMessage"/>
     <variable name="approval" 
                messageType="lns:approvalMessage"/>
     <variable name="error" 
                messageType="lns:errorMessage"/>
   </variables>

   <faultHandlers>
      <catch faultName="lns:loanProcessFault" 
             faultVariable="error">
         <reply   partnerLink="customer"
                  portType="lns:loanServicePT" 
                  operation="request"
                  variable="error" 
                  faultName="unableToHandleRequest"/>
      </catch>
   </faultHandlers>
                                                                  

   <flow>

      <links>
         <link name="receive-to-assess"/>
         <link name="receive-to-approval"/>
         <link name="approval-to-reply"/>
         <link name="assess-to-setMessage"/>
         <link name="setMessage-to-reply"/>
         <link name="assess-to-approval"/>
      </links>

      <receive partnerLink="customer" 
               portType="lns:loanServicePT" 
               operation="request" 
               variable="request" createInstance="yes">
         <source linkName="receive-to-assess"
            transitionCondition=
              "bpws:getVariableData('request','amount')< 10000"/>          
         <source linkName="receive-to-approval"
            transitionCondition=
              "bpws:getVariableData('request','amount')>=10000"/>
      </receive>

      <invoke  partnerLink="assessor" 
               portType="lns:riskAssessmentPT" 
               operation="check"
               inputVariable="request"  
               outputVariable="risk">
         <target linkName="receive-to-assess"/>
         <source linkName="assess-to-setMessage" 
            transitionCondition=
              "bpws:getVariableData('risk','level')='low'"/>
         <source linkName="assess-to-approval" 
            transitionCondition=
              "bpws:getVariableData('risk','level')!='low'"/>
      </invoke>

      <assign>
         <target linkName="assess-to-setMessage"/>
         <source linkName="setMessage-to-reply"/>
         <copy>
            <from expression="'yes'"/>
            <to variable="approval" part="accept"/>
         </copy>
      </assign>

      <invoke  partnerLink="approver" 
               portType="lns:loanApprovalPT" 
               operation="approve" 
               inputVariable="request" 
               outputVariable="approval">
         <target linkName="receive-to-approval"/>
         <target linkName="assess-to-approval"/>
         <source linkName="approval-to-reply" />
      </invoke>

      <reply   partnerLink="customer" 
               portType="lns:loanServicePT" 
               operation="request" 
               variable="approval">
         <target linkName="setMessage-to-reply"/>
         <target linkName="approval-to-reply"/>
      </reply>
   </flow>

</process>