BPEL Functions

This section talks about the important and commonly used functions related to BPEL. These are:

• getLinkStatus()

• getVariableData()

• getVariableProperty()

getLinkStatus()

This function is used to return a Boolean value to indicate the status of a link. Links with positive status are evaluated to true, links with negative status to false. This function can only be used in join conditions. The linkName argument must refer to the name of an incoming link for the activity associated with the join condition.

Syntax

bpws:getLinkStatus (‘linkName’)

Example

<switch name=”BestOfferSelect”

        joinCondition=”bpws:getLinkStatus(
                       ‘AmericanAirlinesCallbackToBestOfferSelect’) 
                       and
                       bpws:getLinkStatus(
                       ‘DeltaAirlinesCallbackToBestOfferSelect’)” >
                       ...    
</switch>

getVariableData()

This function is used to extract arbitrary values from variables.

Syntax

bpws:getVariableData (‘variableName’, ‘partName’?, ‘locationPath’?)

Example

bpws:getVariableData (‘InsuranceRequest’, 
                      ‘insuredPersonData’)           

bpws:getVariableData (‘InsuranceRequest’, 
                      ‘insuredPersonData’,               
                      ‘/insuredPersonData/ins:Age’)           

getVariableProperty()

This function is used to extract global property values from variables.

Syntax

bpws:getVariableProperty (‘variableName’, ‘propertyName’)

Example

bpws:getVariableProperty(‘TicketApproval’, ‘Class’)