Segment Functions - Build custom data integrations in a few lines of JavaScript

https://segment.com/product/connections/functions/

by nzoschke • 7 years ago

2 3 7 years ago

segment.com

nzoschke2• 7 years ago

Engineer on the Segment Functions product here. Happy to discuss any questions about how it works and how we built it.

ryanworl• 7 years ago

Are you using AWS Lambda to provide the sandboxing? If so:

How does the user code actually end up running on the Lambda? Do you have a generic wrapper Lambda which `eval`s the user code, or do you deploy an individual Lambda for each function, etc?

nzoschke2• 7 years ago

Yes we are using Lambda under the hood.

Every customer's custom source or destination is its own Lambda function. This gives us a ton of fine-grained isolation, scalability and visibility out of the box.

We ask customers to implement a single function that converts an incoming webhook to Segment data points:

  async function onRequest(request, settings) {
    Segment.track(...)
  }

Inside the function we save the users code to `handler.js` and inject index.js that loads and calls the users `onRequest` function.

Segment Functions - Build custom data integrations in a few lines of JavaScript

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