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Flowchart
job_chain [label="Job Chain\ntriggered by File Orders\nor Ad Hoc Orders",fillcolor="orange"]
job_sorter [label="Job Order Sorter",fillcolor="lightskyblue"]
job_next_job [label="Next Job", fillcolor="lightskyblue"]

sorter_orders_completed [shape=diamond,label="list of orders completed?",fillcolor="white"]
order_suspend [label="Suspend Order",fillcolor="white"]
order_sort [label="Sort Orders",fillcolor="white"]

order_C [shape="ellipse",label="File Order C\n ",fillcolor="violet"]
order_B [shape="ellipse",label="File Order B\n ",fillcolor="violet"]
order_A [shape="ellipse",label="File Order A\n ",fillcolor="violet"]
 
order_suspend [label="Suspend Orders",fillcolor="white"]
 
order_A -> job_chain
order_B -> job_chain
order_C -> job_chain
job_chain -> job_sorter
job_sorter -> sorter_orders_completed
sorter_orders_completed -> joborder_next_jobsort [label=" yes "]
sorter_orders_completed -> order_suspend [label=" no "]
order_suspend -> job_sorter
order_sort -> job_next_job

Implementation

Components

  • The solution implements a job sorter that can be added to the top of any job chain.
    • This job implements a spooler_process() function that suspends all incoming orders.
    • This job is configured for one task and with an idle timeout attribute, i.e. it executes incoming orders sequentually.
    • After the last order this job waits for the duration specified with the idle_timeout attribute for new orders. 
      • The idle timeout is configured by <job idle_timeout="10"> with the sorter job definition.
      • With the idle timeout being expired this job will execute its spooler_exit() function and will sort all orders that have previously been suspended.
        • Sorting is done in alphabetical order.
        • The orders are reinserted to the next job node that follows the sorter job in the job chain.
  • The sample included makes use of a job chain job_chain1 that includes the job nodes for the sorter job and a hello job.

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