The Notifier module can be set up on TCP and UDP servers.
When using the Notifier module, it must be set up on all servers except for HTTP servers.
Setup
To expose built-in commands to the client, you can use the diarkisexec package for setup.
Add the following to the main function of the server. Below is an example for setting up a UDP server. The diarkisexec.Setup function must be executed before calling diarkisexec.StartDiarkis().
Additionally, you need to configure the interval and contents of message broadcasts with diarkisexec.SetupNotificationService(name, interval, callback).
packagemainimport"github.com/Diarkis/diarkis/diarkisexec"funcmain() { logConfigPath :="/configs/shared/log.json" meshConfigPath :="" diarkisexec.SetupDiarkis(logConfigPath, meshConfigPath, &diarkisexec.Modules{ Notifier: &diarkisexec.Options{}, }) diarkisexec.SetupNotificationService("Notification", 60, handleNotification) diarkisexec.SetupDiarkisUDPServer("/configs/udp/main.json") diarkisexec.StartDiarkis()}funchandleNotification() (*diarkisexec.Notification, error) {// Retrieve notification data from a database by the current time notificationData := someDatabase.GetNotificationDataByCurrentTime(year, month, date)if notificationData ==nil {// No notification data to send outreturnnil, nil } n :=&diarkisexec.Notification{} n.ID = notificationData.ID n.Name = notificationData.Name// Ver is used by the client to identify the message when received. n.Ver = notificationData.Ver// Cmd is used by the client to identify the message when received. n.Cmd = notificationData.Cmd n.Message = []byte("Notification message says 'Hello from the server'")// TTL is in seconds to indicate the availability of the notification data.// The notification will be available for the not-connected clients for the duration of TTL and// will be sent to the clients when they connect before TTL expires. n.TTL =int64(60*60) // one hourreturn n, nil}