Introduction

This documentation describes how the substitution of parameter values works in JobScheduler. It is also described how to use paramters in shell script, API Jobs and pre- and postprocessing scripts.

Substitution of parameter values done by JobScheduler

JobScheduler substitutes the values of environment variables when using ${<env_var>} in task parameters.

When <env_var> is an unknown environment variable, JobScheduler substitutes it to empty

To avoid doing the substitution by JobScheduler the value can be quoted with a backslash like \${<env_var>}

Example

<job  name="job_environment">
    <params >
        <param  name="param_from_environment" value="the value of scheduler_home is ${SCHEDULER_HOME} ${test}"/>
    </params>

    <script  language="shell">
        <![CDATA[
echo %SCHEDULER_PARAM_PARAM_FROM_ENVIRONMENT%
        ]]>
    </script>

    <monitor  name="process0" ordering="0">
        <script  language="java:javascript">
            <![CDATA[
function spooler_process_before(){
    spooler_log.info("param_from_environment=" + spooler_task.params.var("param_from_environment"));
    return true;
}
            ]]>
        </script>
    </monitor>

    <run_time />
</job>

When running this job the output will b:

2015-12-07 10:39:32.458+0100 [info]   SCHEDULER-918  state=starting (at=2015-12-07 10:39:32.403+0100)
2015-12-07 10:39:33.984+0100 [info]   param_from_environment=the value of scheduler_home is C:/Program Files/sos-berlin.com/jobscheduler/scheduler_current 
2015-12-07 10:39:33.987+0100 [info]   SCHEDULER-987  Starting process: "C:\WINDOWS\TEMP\\sos-A4CFC1B980.cmd"
2015-12-07 10:39:34.019+0100 [info]   [stdout]  
2015-12-07 10:39:34.019+0100 [info]   [stdout] C:\Users\ur\Documents\sos-berlin.com\jobscheduler\scheduler_current>echo the value of scheduler_home is C:/Program Files/sos-berlin.com/jobscheduler/scheduler_current   
2015-12-07 10:39:34.019+0100 [info]   [stdout] the value of scheduler_home is C:/Program Files/sos-berlin.com/jobscheduler/scheduler_current 

Please note

• ${test} has been substituted to empty
• To access the value of the parameter in a shell script, the name must be prefixed. The value of the prefix is
• Default: SCHEDULER_PARAM_
  • Can be set by the parameter scheduler.variable_name_prefix which is defined in the file $scheduler_data/config/scheduler.xml
    • When changing the value of the prefix, JobScheduler has to be restartet.

<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<?xml-stylesheet type="text/xsl" href="scheduler_documentation.xsl" ?>
<spooler>
 
        <config mail_xslt_stylesheet="config/scheduler_mail.xsl" port="4102">
        
                <params>
                        <param name="scheduler.variable_name_prefix" value="SCHEDULER_PARAM_"/>
                        <param name="scheduler.order.keep_order_content_on_reschedule" value="false"/>
                </params>

Attention: JobScheduler do NOT substitute environment variables in order parameters.

Substitution of parameter values done by sos.scheduler.managed.configuration.ConfigurationOrderMonitor

For jobs that are running in a job chain there is an add substitution mechanism provided by the preprocessing java class sos.scheduler.managed.configuration.ConfigurationOrderMonitor

This preprocessing java class does the following

• before processing
  • copy the node paramters that are defined in jobchain.config.xml into the the order paramters
  • if an order parameter with the same name already exits, it will be overwritten
  • substitution of all ${<param>} with
    • JobScheduler parameters that are defined in the file $scheduler_data/config/scheduler.xml
    • task parameters that are defined in the actual running job
    • order parameters that are defined in the order
    • node paramters that has been copied to the order parameters
• after processing
  • delete all node parameters from the order.