Adding or editing a task

When adding or editing a task, the following form will show up:

Add task form

Adding a new scheduled task

Some fields require additional explanations (inline help is available by moving the mouse over the field labels):

  • A disabled task will be skipped by the command-line script. It may still be launched manually, as described above.
  • The class selector is available only when adding a new task. The class cannot be changed when editing a task, since there’s no sense in that.
Select a class

Select the class of the scheduled task

  • A task must have a start date. The end date is not mandatory, though. A task without end date will run forever. Dates and times must be entered in the server’s time zone. The server’s time appears at the bottom of the form.
  • The frequency needs be entered only for recurring tasks. It can be either a number of seconds or a cron-like command. Since TYPO3 4.5 the Scheduler supports the full cron syntax, including ranges, steps and keywords like @weekly . For more information on cron syntax, see http://en.wikipedia.org/wiki/CRON_expression .
  • Parallel executions are denied by default (see “Tasks execution” above). They must be allowed explicitly.
  • At the bottom of the form (highlighted area) there may be one or more additional fields. Those fields are specific to each task and will change when a different class is selected.

If there are some input errors, the form will reload upon submission and display the relevant error messages. When the input is finished and correct, the view switches back to the list view and displays a confirmation message.

Input validation

Input validation failed when adding a new scheduled task or editing an existing one

Input validation OK

Input validation succeeded when adding a new scheduled task or editing an existing one

If an error occurs when validating a cron definition, the Scheduler’s built-in cron parser tries to provide an explanation about what’s wrong.