template-job-microservice-js

A tiny template for bootstrapping a new job-queue-based microservice.

Pre reqs

• You need Node.js 14 installed to run the microservice (use NVM, the node version manager, if you need to switch between versions of Node.js).
• You need Docker and Docker-Compose installed to run the RabbitMQ instance (just install Docker for Desktop for your platform, it should come with everything you need).

Running in development (with real RabbitMQ)

• Clone this repo.
• Open a terminal and cd into the repo.
• Now run Docker-Compose, this boots a RabbitMQ instances which you need for this type of microservice:

docker-compose up

TODO: This doesn't work properly yet because there is no job-queue microservice to connect to.

• Now open a second terminal to run the microservice. Cd into the repo.
• First install dependencies:

npm install

• Now run in development mode:

npm run start:dev

Running in dev mode uses nodemon, so you can edit code and the microservice will automatically restart and reload the updated code.

Running in development (with mock RabbitMQ & job-queue)

Run the testbed that has mock dependencies like this:

npm test

How to know that the microservice is started

"Online" should be printed in the console if started successfully.

You can also point your browser at http://localhost:3000/is-alive to see if the microservice is handing HTTP requests.

Invoking a job

To run job handler the job-based microservice you need to invoke a job.

TODO

Running in production

To run in production, first build TypeScript code to JavaScript:

npm run build

Now run using the normal start command:

npm start