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Event Handler Fields

In VTA Configuration Manager, you can edit the following fields in the Event Handler screen.

Priority

• Priority for evaluating and running this event handler.

• Value—Integer in the range 1–1000; the smaller number has the higher priority

• Default—No value

Events

• List of events.

• Value—Select from the list of configured events. Use the Ctrl or Shift keys to select multiple events.

• Default—No value

Condition

• Condition that the event handler evaluates to determine whether the event handler should handle the event.

• Value—You can specify the condition as a formula, as a JavaScript program, or as one of the following values returned by the JavaScript program:
  • true—Event handler should handle the event.
  • false—Event handler should not handle the event.

• Guidelines—If no condition is specified, true is returned as the value. If a referenced attribute does not exist in the event, the referenced attribute’s value is null.

• Default—true

• Example—The following example is a condition that must be met to refill a quota:

  var newBalance=<balance_BoughtQuota>+<balance_PeriodicQuota>;

  if(<old_balance_PeriodicQuota>==null) <old_balance_PeriodicQuota>=<balance_PeriodicQuota>;

  if(<old_balance_BoughtQuota>==null) <old_balance_BoughtQuota>=<balance_BoughtQuota>;

  return <old_balance_PeriodicQuota>+<old_balance_BoughtQuota><=0&&newBalance>0;

Actions

• Actions that the event handler performs in response to an event.

• Value—Use the Add and Remove buttons to create a list of selected actions. Multiple actions are performed in the order specified in the list.

• Default—No value