Runtime tools : Service components : Web Messaging service : Architecture
  
Architecture
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Client:
integrate dojo cometd API in a hidden widget (WebMsg)
subscribe topic and receive inbound message by using a UDTT widget and ECA
publish message to server and/or browser by using a UDTT widget and ECA
Server:
provide a UDTT service (WebMsgService) to publish message in operation/flow
publish message to browser client instantly (without notable delay) by using a UDTT operation/service
support both WAS and Weblogic
use UDTT program model (context, operation and service) only
(In another words, the implementation on WAS and Weblogic is transparent to the end programmer.)
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Web Messaging service