pedrogarrett
What is the best (or maybe simplest) way to call Elixir functions from Ruby?
I have a Rails application in which we are gradually porting functions in it over to an Elixir application. I could, of course, add Phoenix to the Elixir app and make http/json calls to it, but it seems like there ought to be a more efficient method.
Where Next?
Trending in Questions
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
ElixirConf EU 2027, 22-23 April, Lisbon & online. Call for Talks and Call for Training open until 15 Dec.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #code-sync
- #discussion
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #ai
- #umbrella
- #full-time-contract
- #elixirconf-us
- #podcasts-by-brainlid
- #blog-post
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #elixirconf-eu
- #processes
- #security
- #api
- #forms
- #performance
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Practical resources that improve the lives of professional developers.
Producing high quality Elixir screencasts since 2017.
**Building the future of software with AI, trust, and human connection.**
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 3- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
blatyo
This is one approach: https://medium.com/@sugarpirate/rise-from-the-ashes-incremental-apis-with-phoenix-b08cd66bd142
easco
You could also have the Ruby application launch the Elixir application, or vice-versa, and communicate one to the other over stdin and stdout (using something like the External Term Format External Term Format — OTP 29.0.2 (erts 17.0.2) for which there are Ruby Gems available).
Really any IPC mechanism on the platform you are using should be able to let the Ruby and Elixir processes communicate, it doesn’t have to be done over HTTP.
On the Elixir/Erlang side, you should look into “Ports”. At the end of the day your goal is not to call functions in Elixir so much as it is to send a message to an Elixir process and have it execute some functions.
karmajunkie
This isn’t really an Elixir/Ruby problem so much as a systems integration issue—anything you’d do to integrate two services normally should also apply.
HTTP calls are probably the least problematic as you can treat them synchronously. However if you can handle asynchronicity in the Rails application, then my favorite means of doing this kind of thing is a durable message queue. You’ve got a plethora of choices there ranging from sidekiq-style queues in Redis (and there are at least a couple of options for consuming sidekiq format messages in Elixir) to AMQP servers like RabbitMQ to something hosted like AWS SQS. Treat the functions as command messages and send back a response message from Elixir to be further dealt with by the Rails app.