...

"abc" ++ "def"

Logical Operators

Check a Boolean expression and if it evaluates to false then an alternative value is returned.

Example:

false orElse true

Conversion

Convert to Number

...

• $js7JobName
  • The name of the current job for which an order is executed.
• $js7JobExecutionCount
  • A counter for the number of times that the same job node is executed within a workflow, e.g. if used with the JS7 - Retry Instruction
• $epochMilli
  • The number of milliseconds since January 1^st 1970 UTC.
• $returnCode
  • The numeric exit code of the current job for which an order is executed.

...

Built-in Functions

• env( string: <environment-variable>, string: <default> )
  • The function reads the value of an existing OS environment variable. The name has to be specified in correct uppercase/lowercase spelling.
  • If the environment variable does not exist then an error is raised and the Order fails. Alternatively an optional default value can be specified.

  • Examples:

    Expression	env( ('JS7_AGENT_CONFIG_DIR')
    JSON	"env( 'JS7_AGENT_CONFIG_DIR' )"
    Sample Value	/var/sos-berlin.com/js7/agent/var_4445/config

    Expression	env( 'JAVA_HOME', '/usr/lib/jvm/java-1.8-openjdk' )
    JSON	"env( 'JAVA_HOME', '/usr/lib/jvm/java-1.8-openjdk' )"
    Sample Value	/usr/lib/jvm/java-1.8-openjdk

    Expression	env( 'HOSTNAME', env( 'COMPUTERNAME' ) )
    JSON	"env( 'HOSTNAME', env( 'COMPUTERNAME' ) )"
    Sample Value	2021-05-03 07:30:42

    This example assumes the $HOSTNAME environment variable to be available for Agents running on Unix or the %COMPUTERNAME% environment variable to be available for Agents with Windows.
    
    
    

• now( format='yyyy-MM-dd hh:mm:ss', timezone='Europe/Berlin' )
  • The job start date. This date can be formatted using Java date qualifiers. Optionally a time zone can be specified, by default the UTC time zone is used.

  • Examples:

    Expression	now( format='yyyy-MM-dd' )
    JSON	"now( format='yyyy-MM-dd' )"
    Sample Value	2021-05-03

    Expression	now( format='yyyy-MM-dd hh:mm:ss' )
    JSON	"now( format='yyyy-MM-dd hh:mm:ss' )"
    Sample Value	2021-05-03 07:30:42

    Expression	now( format='yyyy-MM-dd hh:mm:ssZ', timezone="Europe/Berlin" )
    JSON	"now( format='yyyy-MM-dd hh:mm:ssZ', timezone=\"Europe/Berlin\" )"
    Sample Value	2021-05-03 09:30:42+02:00

...

• jobResourceVariable( string: <JobResource>, string: <Variable> )
  • The function provides access to JS7 - Job Resources: it reads from the Job Resource specified with the first argument and returns the value of the Job Resource variable specified with the second argument. The function is evaluated by the Controller when adding an order. It is therefore not required to specify the requested Job Resource outside of the function. In fact the Controller reads the respective variable values from the indicated Job Resources and adds them to an Order Variable that is consider final and cannot be modified later on.
  • This function can be used with the variable declaration of a workflow only. It cannot be used with later job arguments or environment variables. When declaring the order variable with the workflow then the final data type has to be used.

  • Examples:

    Expression	jobResourceVariable( 'database', 'db_user' )
    JSON	"jobResourceVariable( 'database', 'db_user' )"
    Sample Value	scott

    Expression	jobResourceVariable( 'database_' ++ $country, 'db_userpassword' )
    JSON	"jobResourceVariable( 'database_' ++ $country, 'db_userpassword' )"
    Sample Value	tiger

    This example dynamically specifies the name of the Job Resource by concatenating the fixed value 'database_' and the value of the $country order variable. 

• JobResource:<JobResource>:<Variable>
  • The function returns the value of the specified <Variable> from the given <JobResource>.
  • Consider the shorthand syntax that does not use brackets

  • Examples:

    Expression	JobResource:database_uk:db_user
    JSON	"JobResource:database_uk:db_user"
    Sample Value	scott

    
    

    
    

    Expression	JobResource:database_uk:db_user orElse 'scott'
    JSON	"JobResource:database_uk:db_user orElse 'scott'"
    Sample Value	scott

    This example reads the db_user variable from the database_uk Job Resource. If the variable does not exist then the default value 'scott' is used.

Further Resources

• JS7 - Assignment of Variables
• JS7 - Job Resources