JITL join job for optimized synchronization in a split & join workflow pattern

Current Situation

• The JITL job JobSchedulerSynchronizeJobChains allows to synchronize orders from a number of job chains and from the same job chain, e.g. if created by a JobSchedulerJobChainSplitter job.
• The JITL job suspends incoming orders and checks completeness of the expected orders before the orders are moved to the next job node. This behavior slows down processing if a large number of orders is expected as all suspended orders are checked for each incoming order.

Desired Behavior

• A simplified implementation for the synchronization with fewer features but improved processing speed should be available.
• The synchronization is restricted to joining orders from a single job chain.
• The number of expected orders is just counted, i.e. incoming child orders from a splitter job are immediately dropped and the parent order is moved forward if the expected number of orders is reached.