UCS Director - Custom Task

May 25, 2015

The platform is built on Javascript (Cloupia is based on Javascript Rhino – a server side language that is a mixture of Java and Javascript).
Rhino : JavaScript Library For Java
Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users. It is embedded in J2SE 6 as the default Java scripting engine.

https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rhino/History

Invoking other tasks from a custom task: "Inner task"
Either Pre-built or other Custom tasks can be invoked from a Custom Task.

• Inner Tasks produce the log messages to current SR.
• Inner tasks register object changes to current SR
• Inner tasks register “undo” tasks to current SR (so Rollback will work correctly)
• Inner task output is not automatically visible outside the Custom Task. Script developer must
explicitly save it using ‘output.X = Y’ expression
• Each custom task can invoke multiple inner tasks
• Each custom task may may invoke an inner task in a loop
• If inner task fails, outer Custom Task automatically fails.
• This can be modified by using ‘try { } catch(e) { } ‘ block

Obtain from the Task library show/hide script

Custom Task;

  • Provides the ability to add new workflow tasks with well defined inouts & outputs
  • once a custom task is properly created these is no inherent difference in behaviour for 'built-in tasks' and 'custom tasks'
  • Implementation of the logic is done through a script
  • A custom task feature allows users to create a new custom task off of any system and modify or add inputs and outputs of an existing task
  • Typically uses the implicit objects ctxt, logger, util, inout and output
  • Can be exported/imported as custom tasks

Rob Edwards

Northern (UK) chap focusing on platforms, automation, cloud and cloud native applications. Recovering network engineer, although it turns out networking is as important, if not more, now than before!

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