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BPMN Advanced Training: Event-based Gateway

 
 
This low-code tutorial demonstrates the usage of a BPMN Event-based Gateway. The following sample describes a User Registration process. The User Registration process starts a Registration Moderation process by a message. If the Registration Moderation process doesn't notify the moderation result within 3 minutes, then it is canceled and the request is denied.
 
  • UserRegistration:
  • This process begins with a User Task Request Registration, which is saved in a Registration Business Object named registration.
  • An exclusive gateway asks if the request was canceled. If yes the process ends and if not it continues to send the message object to the second collaboration model.
  • Then the process uses a Message Intermediate Event: Throwing "Start Moderation" to send the message object, in this case is a “registration”.
  • The process uses an Event-based Gateway to wait for Message Event or Timer Event replays.
  • The process waits at the Message Intermediate Event: Catching for the message from the "RegistrationModeration" process for 3 minutes if not the Timer flow is activated.
  • After receiving the message, the attributes of the related Message Object are displayed in the User Task "View Registration Result".
  • In the User Task "View Registration Result" is possible to select if the process finish or begin again when the button Retry is selected and a gateway is configured to handle this.
     
  • RegistrationModeration:
  • The Message Start Event starts this process.
  • The attributes of the Registration Object, which was sent as a payload of this message, are displayed in a User Task "Moderate Registration".
  • If the Registration Moderation process doesn't notify the moderation result within 3 minutes, then it is canceled and the request is denied.
  • The process ends with Message End Event, which send the message together with the Registration Object to the "UserRegistration".
 
The following screenshot displays the Event-based Gateway.
 
 
 
 
The following screenshot displays the collaboration model RegistrationModeration.