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Fan-In functions

In Akka Streams GraphDSL, a Fan-In function is a function with multiple inputs and single output.

In simple words, Fan-In means multiple inputs. A GraphDSL Fan-In function is also known as GraphDSL Fan-In junction:

As shown in the preceding diagram, it takes two inputs from other components from the RunnableGraph and performs a given operation to result it to one output:

Akka Streams GraphDSL has the following Fan-In junctions:

Merge[In]: (N inputs, 1 output) This picks randomly from inputs pushing them one by one to the output ...

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