What is a Message in a Stream?

Event Centric Thinking


This article talks about a message in the context of a stream.

A message is the atomic unit of data.

A message in a stream is also known as:

  • an event
  • an object in motion
  • a signal
  • an item
  • data
  • emission, emits 1)


  • Event time = when it happens
  • Processing time = when it's processed



Network - Message Delivery Properties (multiplicity)

Data Flow Message

See also Data Flow - Message (Operand)

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