Hi Stan, In case you haven't found an answer.
The variable resolution happens even before the function call. So if the variable is uninitialized a fault will be throw by the engine as per the BPEL specification. ODE has some extensions to bypass the evaluation of expressions that result in these faults: https://ode.apache.org/extensions/flexible-assigns.html Or, another approach could be to define the activity that references the variable within a Scope activity and have a fault handler within that scope that catches the specific fault, that way you can decide the next course of action. Or, if possible initialize the variable atleast with the root element and then use the exist(expr) or boolean(expr) xpath functions. regards, sathwik On Thu, Mar 3, 2016 at 5:56 PM, Stan Angeloff <[email protected]> wrote: > Hi all, > > I am running into a case where I need to check if a variable has been > initialized in a *<bpel:condition />*. The variable is first defined inside > *<bpel:variables>* without inline initialization. The following condition > is then added to a *<bpel:repeatUntil>*: > > ($variableIf_2Out.parameters/getStatusResult/status = 'CLICKED') > > However *$variableIf_2Out* may not have been initialized as the > *<bpel:invoke>* activity that outputs it is conditional and may not have > been encountered yet. > > I tried with: > > (exists($variableIf_2Out) and > $variableIf_2Out.parameters/getStatusResult/status = 'CLICKED') > > but that didn't seem to help (the expression language is set to > *"urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"*). > > In a desperate attempt I tried: > > (exists(bpel:getVariableData('variableIf_2Out', 'parameters')) and > $variableIf_2Out.parameters/getStatusResult/status = 'CLICKED') > > and even: > > <bpel:condition xmlns:bpws=" > http://schemas.xmlsoap.org/ws/2004/03/business-process/";> > (exists(bpws:getVariableData('variableIf_2Out', 'parameters')) and > $variableIf_2Out.parameters/getStatusResult/status = 'CLICKED') > </bpel:condition> > > That didn't get me anywhere either (according to the logs the function is > not defined or arguments cannot be matched). > > Is there a way in ODE by which a variable can be checked to have been > initialized? > > Thanks, > - Stan >
