Condition

Because some production steps needs to fulfill conditions sometimes there is a control structure Condition for this specific case. The Condition block consists of a Condition which includes a boolean expression, a Passed block in which instructions are given for the case that the boolean expression evaluates to True. If the expression is not met the statements inside the Failed block are executed.

In the following example the paintingTask dries the painted material afterwards by calling the Service Drying. The output of the Service call is saved in a variable dr of type DryingResult which provides information about the wetness of the paint. If the wetness in form of a number value is below a certain threshold (here: 10) the Task should continue with the next production steps, otherwise it dries again.

The Failed block is optional: You can omit it and if the condition is not met the scheduler will execute the next statement after the Condition block.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21

Struct DryingResult
   wetness: number
End

Task paintingTask
    ...
    Drying
        Out
            dr: DryingResult

    Condition
        dr.wetness < 10
    Passed
        ... # continue 
    Failed
        Drying
            In
                dr
            Out
                dr: DryingResult
End