The code we write in this chapter has real external dependencies that we need to set up before we can start to build our system.
Be sure to check out the chapter notes at https://github.com/matryer/goblueprints if you get stuck on installing any of the dependencies.
In most cases, services such as
nsqd will have to be started before we can run our programs. Since we are writing components of a distributed system, we will have to run each program at the same time, which is as simple as opening many terminal windows.
NSQ is a messaging queue that allows one program to send messages or events to another or to many other programs running either locally on the same machine or on different nodes connected ...