Notification

/* 
 * This structure is used to generated notification, it can be generated 
 * from any source (ServerNotification, MonitorNotification, 
 * TimerNotification, etc.). It has all the information like type, 
 * source, sequence number, time and message about the event. 
 */

U_INT32	type;		/* Type of the notification */
Object	*source;	/* Sourch which generates notification */
U_LONG	seqNum;		/* Sequence number of the notification */
U_LONG	timeStamp;	/* Time at which notification is emitted */
CHAR	*message;	/* Description of the notification */
Object	*extraInfo;	/* To support structure extension */

NotificationFilter


/* 
 * This structure contains filter method for the notifications. Before a 
 * notification is broadcased to all its listener this "Filter" 
 * method will be invoked inorder to do some filtering. 
 */

/* Method to filter the broadcast trap */
U_CHAR (*IsNotificationEnabled)(Notification *, CHAR *);

NotificationListener


/* 
 * This structure contains notification handler method for the 
 * notification. After receving this notification the handler 
 * method will do some action based on the agent implementation. 
 */

/* Method to handle notification. */
void (*HandleNotification)(Notification *, CHAR *);

NotificationHolder


/* 
 * Holder strcutre to store information about the notification listener 
 * like fileter, handler  methods and handBack. This structure will be  
 * used by the notification broadcaster during AddNotificationListener() 
 * and SendNotification() methods processing. 
 */

CHAR	*handback;				/* Context name of the notification */
NotificationFilter *filter;		/* Filter function of the notification
listener */
NotificationListener *handler;	/* Handler function of the notification
listener */