Resource Selection extension

[GeoffHook]

In many business processes the particular resource instance that is selected for a task must stay with that piece of work (token) through later steps. This named resourced could be stored as an attribute of the token and referred to in a subsequent resource selection expression.

This implementation could also be used to stop a particular resource being used at a later step to work on a token. This functionality is sometimes required to make sure a quality check is performed by a different resource instance to the one that did the work, even though they maybe both doing the same role.

[SimonRinguette]

One possible solution would be to introduce an evaluation moment for the property (evaluateAt) and introduce a getCurrentPerformer() method to xpath.

<ElementParameters elementRef="Task1">
    <ResourceParameters>
        <Selection >
            <ExpressionParameter value="orResource(getProperty('storedFromA') , getResource('finance', 2) | getResource('sales', 50))" />
        </Selection>
    </ResourceParameters>
    <PropertyParameter>
        <Property name="storedFromA" evaluateAt="end">
            <ExpressionParameter  value="getCurrentPerformer()"  />
        <Property>
    </PropertyParameter>
</ElementParameters>