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The Action Helper

This can be thought of as the engine that receives the scheduled commands to run. It awaits messages from the scheduler which - when the time comes to run a job as per the cron expression - will hand the command to the SchedulingHelper and being executing

Interface

The SchedulingHelper has two methods:

`execute(String, Command)`: Run a task

This is what the scheduler will call at the right time. The "String" is the triggerIdentifier from the JobSpecification, and the Command is the triggerCommand from the same specification.

`supports(Command)`: Does this SchedulingHelper support this command?

When defining multiple SchedulingHelpers, the scheduler needs to know which SchedulingHelper can support which command.