A callback is Qube's mechanism to allow custom execution of queuing logic depending upon the events which occur during the lifetime of a Qube job or upon pre-defined system events.
The use of callbacks can range from sending email when a job has completed, to designing complex dependency trees or direct integration with an asset tracking system.
When specifying a callback, Qube requires a little information in order to execute it properly. This includes:
- The trigger expression to specify when the callback should be executed.
- The scripting language to use for the callback.
- The action or code the callback will execute each time the trigger condition is met
Callbacks are defined as a list of one or more key/value pairs which is appended to the job's callback list.
Python API Examples
jobB waits for jobA
Using the "qube" callback language