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  • JobScheduler can handle dependencies at job chain, job and order level:
    • Pre-processing can be defined at job level to check if required resources are available.
      • Pre-processing can also be used to set environment variables and to communicate with other JobScheduler instances etc.
      • Examples would be to check if records in a database were available, if a previous job produced some required output etc.
    • Post-processing can be used to check if the processing was successful, if required results are produced or to decide on the next processing step,
      • Examples would be to check if the total records in a database were are more than 1 Million, then to start a database re-index job and else to skip that job. 
  • JobScheduler provides a JITL Job CheckRunHistory to check if a particular job was executed successfully during a given period, e.g. during the last 24 hours.
  • This example job chain has a first node as CheckRunHistory to check if JobA1 was successfully executed in the last 24 hours.
  • In this example the job chain will abort and will end in an error state, however, as per requirement more complex scenarios can be configured, e.g. 
    • wait for 2 hours, 
    • send an alert or
    • start another job.
  • By using JobScheduler configuration and its internal API more possible dependencies can be checked.
  • See JITL job documentation for more information JobSchedulerCheckRunHistory.xml.

Diagram of Job Chain

Job CheckRunHistory

<?xml version="1.0" encoding="ISO-8859-1"?>
<job  title="Checks the last job run" order="yes">
    <params >
        <param  name="JobName" value="Demo/Scenario03/JobA1"/>
        <param  name="start_time" value="-1"/>
        <param  name="message" value="The Job 1. ${JOB_NAME}   2. [JOB_NAME] was not running successfully today until 15:00h "/>
        <param  name="query" value="isCompletedBefore "/>

    <script  language="java" java_class="sos.scheduler.CheckRunHistory.JobSchedulerCheckRunHistoryJSAdapterClass"/>

    <run_time />