Hook listeners

Hooks are invoked by the core code as $OSCOM_Hooks->call('group', 'action'); (replace group and action as appropriate). To respond, a hook listens for the action to be called. This is sometimes called a Publish/Subscribe model. The listener functions are the subscribers. And each call or generate publishes to all subscribers.

File-based hooks do this with methods named listen_action (again replace action with the actual label). E.g. a file-based system hook would be listen_startApplication. A database hook listens for the defined hooks_action.

See also

Hooks