Runtime components : Service components : Web Messaging service
  
Web Messaging service
The Web Messaging service is a publishing and subscribing implementation that connects the browser to the application server for server-side event pushing.
Ways of messaging
Broadcast
All the users will receive the message.
Topic
Only those who have subscribed as interested in this topic will receive the message.
Private
One user sends the message to the other. Only the receiver can see the message.
Message
The message can be a UNICOM® Digital Transformation Toolkit (UDTT™) KeyedCollection(at server side) or JSON Object
Framework and protocol
Using COMET(dojo cometd) framework and Bayeux protocol
Advantages:
has better performance than polling frequently
has wide compatibility than WebSocket
See
Architecture
Preparation
Server side – how to use WebMsgService
Client side – How to use WebMsg widget
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