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The Join Orders Job (JobSchedulerJoinOrders) is a JITL Job and is used to join up parallel executing child segments in a Job Chain. It then continues processing in a single thread once processing of the parallel threads has been completed. It is used in two Job Chain Patterns - Split and Join and "Y".
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To use the example, first start the Parent Order (in this example main_order). This Order has been configured with a number of three parameters, one of which - required_orders - is required by the Join Orders Job. The other two parameters - generate_orders and duration_wait_job are only used to provide a convenient way of making the example work.
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The Join Orders Job basically counts incoming Jobs. This makes it significantly faster than the Sync Job mentioned in the Scope section above, which checks the incoming Jobs for completeness.
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Note that the Join Orders Job only counts orders Orders that have the state of the Join Orders Job as their end state (here join).
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