Facilitate distributed system state transitions via RabbitMQ messaging
We have 3 services named foo, bar, and baz. We would like to spin them up in a specific order to mimic inter-service dependency, the order is depicted below
foo -> bar -> baz- We will make use of RabbitMQ and message queues to manage inter-process communication.
- We will run the services (
foo,bar,baz) using the PM2 process manager.- Each service is running its own express server.
- We will make use of Docker Compose to spin up a RabbitMQ server container as well as an application container to host our 3 services.
Running the project will yield the simple outcome above, where the express apps start in the correct logical order guided by asynchronous IPC. This is just a demo of basic functionality of asynchronous messaging.
To test it out, install the dependencies, make sure you have Docker, then simply run:
npm run compose