A while back, a client asked me “how can I share business logic between services in a Node.js monorepo?”. The TL;DR of it is:
- Encapsulate the shared business logic into modules, and put them in a separate folder.
- In the Lambda handler functions, reference the shared modules using relative paths.
- Use webpack to resolve and bundle them into the deployment package. If you use the Serverless framework, then check out the serverless-webpack plugin. For example:
- Deploy every service on every commit. You can do this with a simple script like the following.
But wait! How do I choose between having a monorepo vs a repo per service?
Don’t worry, I’ve got you covered for that too ;-) You can read about my thoughts on the two approaches here.
Hi, my name is Yan Cui. I’m an AWS Serverless Hero and the author of Production-Ready Serverless. I have run production workload at scale in AWS for nearly 10 years and I have been an architect or principal engineer with a variety of industries ranging from banking, e-commerce, sports streaming to mobile gaming. I currently work as an independent consultant focused on AWS and serverless.
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Originally published at https://theburningmonk.com on June 29, 2019.