A distributed system base on actor model,uses zookeeper for synchronousing information of distributed system. actor is base programming unit of the framework, each actor has a unique path registed in zookeeper,and a mailbox for receiving message from other actors, use Context().Tell(path interface{},msg interface{}) to send msg to actor of path. message pass between actors should register two func encoder and decoder in crntext. dispatcher is responsible for distributing message for actors.
in pingpong_test,you can see 2 balls are passed between 4 players.