This documentation is for WSO2 Business Process Server version 3.5.0. View documentation for the latest release.

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When invoking a service asynchronously, we need to define two roles (myRole and partnerRole) for the partner link. In a synchronous interaction only partnerRole is need to be defined. These roles are defined in partner link type and they map to particular port types. A partner link type binds two port types; port type process offers(myRole) to a partner and port type partner offers(partnerRole) to a process. In the above example DILoanService is invoked asynchronously and DILoanService has to provide aportType, which defines the partnerRole and another portType which definesmyRole.

 


Deploying the Sample

WSO2 BPS provides a sample, which can be deployed and executed to understand the constructs. Follow the instructions below to deploy and trigger the process.

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How asynchronous interaction works

In LoanServiceLoanProcess.bpel, the following snippet is given.

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5. partnerLink="DILoanServicePL" - An essential attribute in a <receive /> element. This determines the WSDL's portType to be chosen based on the partnerLinkType attribute and the myRole attributes defined in the particular <partnerLink /> element. For example, in LoanServiceLoanProcess.bpel,

Code Block
languagehtml/xml
<partnerLinks><partnerLinkname="DILoanServicePL" partnerLinkType="ns2:LoanServicePT" partnerRole="LoanServiceRole" myRole="LoanServiceClientRole"/></partnerLinks> ......... <receivename="ReceiveDILoanService" createInstance="no" partnerLink="DILoanServicePL" operation="onLoanOffer" portType="ns2:LoanServiceCallbackPortType" variable="diLoanServiceResponse"><correlations><correlationset="correlator" initiate="no"></correlation></correlations></receive>

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