github.com/ReactiveGo/multicast (go): Package multicast provides a Chan type that can multicast and replay messages to multiple receivers.  Native Go channels don't support multicasting the same message to multiple receivers and they don't support replaying previously sent messages.  Unlike native Go channels, messages send to this channel are multicast to all receiving endpoints. A new endpoint created while the channel is operational can choose to receive messages previously sent by specifying a replay count parameter, or 0 to indicate it is only interested in new messages.  You can also limit playback to messages younger than a certain age because the channel stores a timestamp with each message you send to it.  Just like native Go channels, the channel exhibits blocking backpressure to the sender goroutines when the channel buffer is full. Total speed of the channel is dictated by the slowest receiver.  This multicast channel is different from other multicast implementations in that it uses only fast synchronization primitives like atomic operations to implement its features. Furthermore, it also doesn't use goroutines internally. This implementation is low-latency and has a high throughput.  If you are in a situation where you need to record and replay a stream of data or you need to split a stream of data into multiple identical streams, then this package offers a fast and simple solution.  Heterogeneous simply means that you can mix types, that is very convenient but not typesafe. The Chan type provided in this package supports sending and receiving values of mixed type:  The implementation in this package is generated from a generic implementation of the Chan type found in the subdirectory "generic" inside this package. By replacing the place-holder type with "interface{}" a heterogeneous Chan type is created. To regenerate this channel implementation, run jig inside this package directory:  Example uses all the functionality that we want to export for this multicast package. It guides the generation of the implementation by jig.
Keywords: channel|generics|jig|reactivego