Call external BW process in mapper

Problem: Consider many records of entity A where enrichment needs process call for every record, decomposition before call and composition after call. This may impose serious performance hit.

Solution: Construct Java Custom Function calling Java Event Starter using LinkedBlockingQueue. Static XPath function pushes container with String argument and another LinkedBlockingQueue for response. Java Event Starter receives container, executes actions using argument and pushes response to container's LinkedBlockingQueue.