called when configuration of the node was changed , a node is added/removed , etc. . this callback is to signal when there 's any change to the list of slaves registered to the system , including addition , removal , changing of the setting , and so on . concode_field_sep PlaceHolder placeHolder concode_field_sep ExtensionList<ComputerListener> all concode_elem_sep void onTemporarilyOffline concode_elem_sep void onTemporarilyOnline concode_elem_sep void onLaunchFailure concode_elem_sep boolean unregister concode_elem_sep void onOffline concode_elem_sep void onOffline concode_elem_sep void preOnline concode_elem_sep void onOnline concode_elem_sep void onOnline concode_elem_sep void preLaunch concode_elem_sep void register
void function ( ) { }