Messaging Terms

My understanding of SOA was helped with knowledge of some higher level messaging terms.

One way messaging.

  • Send a message, you may get 0, 1, + responses.
  • Don’t tie up resources waiting for the answer.


  • A request to do something.
  • Owned by the destination system.
  • Present tense.
  • Not sent between services
  • Open Door


  • A notification that something has happened.
  • Owned by the source system.
  • Past tense.
  • Riased by one Service, Consumed by another Service
  • Door Opened

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