Defines the action to be performed when a web notification is received.
Event OnMessage(&VbleBasedOnNotificationInfoSDT)
Event_code
EndEvent
Where:
&VbleBasedOnNotificationInfoSDT
Variable based on the "NotificationInfo" Structured Data Type (SDT) object.
Event_code
Code defined inside the event to process the info received in &VbleBasedOnNotificationInfoSDT.
Objects: Transaction, Web Panel
Generators: .NET, .NET Framework, Java
By using the Server.Socket external object, it is possible to send information from the server to a client (or all of them) without being requested by the client. These are silent notifications received on the client side.
Thus, when a web notification is received on the client side, the OnMessage Event is executed receiving by parameter a variable based on the "NotificationInfo" SDT:
Inside this event, the received information must be processed as you consider convenient.
For example, consider a Knowledge Base to manage hotel reservations.
Suppose that when a hotel reservation is inserted, all the users viewing that hotel should receive a notification alerting that someone has made a reservation.
On the server side, after loading the SDT variable, the broadcast method must be executed to send the notification to all users.
On the client side (Web Panel object or Transaction object), inside the OnMessage event, you have to enter the code to compare if the Id SDT member (the reserved hotel) matches one of the shown hotels to display a message.
Server.Socket external object