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Only draw-back: In the UI it is currently only possible to configure callbacks for the action handlers as they are configured in the workflow action configuration. It is so far NOT possible to only configure a callback, when the event happens in the context of a specific workflow, workflow step or workflow step type or workflow user state. If the same action handler (for example handleAllFinishOfARole) is defined for to different cases (for example when workflow step review is finished and when workflow step Review2 is finished), the callback defined (and possibly overwritten by client) will be called for both cases. So far it is not possible to distinguish in the UI-based definition, for which of the cases the callback URL should be set separately. This is only possible directly in the workflow_action table. Yet there it is not possible to overwrite it on client level. This means, overwriting on client level is only meaningful considering those restrictions.
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