andresoro / cast

one-to-many channel abstraction

Cast

An interface to satisfy a one to many message passing pattern (fan out). This problem arose when I wanted mulitple one-to-many messaging patterns in a backend server. Cast allows for an input channel to fan-out to multiple output channels with each output channel recieving the same value. For example, this can be used as a dispatcher to relay messages from a process in a server to multiple clients.

Example usage

package main

import "github.com/andresoro/cast"

func main() {

	// where our values come from
	producer := make(chan []byte)
    
	// init relay, add channels
	relay := cast.New(producer)

	// output channels
	outputs := make([]chan []byte, 0)
	for i := 0; i < 5; i++ {
            // return a client channel 
            ch := relay.New()
            outputs = append(outputs, ch)
	}

	

   	// start relay, now listening to producer channel
	relay.Start()

	// value sent to producer will be sent to every output channel
	producer <- []byte("Hello World")

}