Monitor when a user exceeds the usage limit for your OCaml service

These days, a lot of services are moving to a pay-as-you-go model. This model is either based on a monthly usage limit or metered usage. This is especially common for cloud, software, and other online services. So, chances are that if you're building a service with OCaml, you'll have to roll your usage model and limits.

No matter your implementation, you will be required to set up an internal system to track usage and notify yourself and your team when a user has reached their limit. This is a common enough problem as it helps you understand how your users use your service, and you can improve your product based on that.

LogSnag is a service that helps you monitor your important events in real-time. It's an excellent tool for this problem and works seamlessly with OCaml. In addition, LogSnag makes it trivial to send events to your dashboard and receive push notifications when something important happens.

For example, let's say you're building a service with OCaml that allows users to upload files. However, you want to limit the number of files a user can upload to 10. You can use LogSnag to send an event to your dashboard when a user uploads a file. You can then set up a rule to notify you when a user has uploaded ten files. This way, you will know when a user has reached their limit, allowing you to take further action if needed.

Setting up LogSnag

1. Sign up for a free LogSnag account.
2. Create your first project from the dashboard.
3. Head to settings and copy your API token.

OCaml code snippets

Copy the following code snippet to your OCaml project. Please note that you will need to replace the API token with your own.

open Lwt
open Cohttp
open Cohttp_lwt_unix

let postData = ref "{\"project\":\"my-saas\",\"channel\":\"limits\",\"event\":\"Usage Limit Exceeded\",\"description\":\"The user has exceeded the usage limit for the service.\",\"icon\":\"🚨\",\"notify\":true}";;

let reqBody = 
  let uri = Uri.of_string "https://api.logsnag.com/v1/log" in
  let headers = Header.init ()
    |> fun h -> Header.add h "Content-Type" "application/json"
    |> fun h -> Header.add h "Authorization" "Bearer YOUR_API_TOKEN"
  in
  let body = Cohttp_lwt.Body.of_string !postData in

  Client.call ~headers ~body `POST uri >>= fun (_resp, body) ->
  body |> Cohttp_lwt.Body.to_string >|= fun body -> body

let () =
  let respBody = Lwt_main.run reqBody in
  print_endline (respBody)

OCaml integration details

LogSnag is a flexible and easy-to-use event tracking service that works excellently with OCaml. In addition to real-time event tracking and cross-platform push notifications, LogSnag provides powerful user journey tracking, simple event filtering, search, and analytic tools such as charts.

In addition to tracking usage events, you can also use LogSnag to track other important events such as errors, user sign-ups, user logins, payments, or anything else you can think of.

Setting up LogSnag with your OCaml application takes a few minutes, and you can start tracking events in no time.

Other use-cases for LogSnag

1. Monitor your CI/CD build status for your OCaml application
2. Monitor your CPU usage in your OCaml application
3. Monitor when database goes down in your OCaml application
4. Monitor high disk usage in your OCaml application
5. Monitor when a user changes their email address in your OCaml application
6. Monitor failed logins in your OCaml application
7. Monitor failed payments for your OCaml application
8. Monitor memory usage in your OCaml application
9. Monitor MySQL downtime in your OCaml application
10. Monitor when a new feature is used in your OCaml application
11. Monitor your Postgres downtime in your OCaml application
12. Monitor Redis downtime in your OCaml application
13. Monitor suspicious activity in your OCaml application
14. Monitor when a user is being rate limited in your OCaml application
15. Get a notification when your OCaml code is done executing
16. Send push notifications to your phone or desktop using OCaml
17. Track canceled subscriptions in your OCaml application
18. Track your OCaml cron jobs
19. Track when a file is uploaded to your OCaml application
20. Track when a form is submitted to your OCaml application
21. Track payment events via OCaml
22. Track user sign in events in OCaml
23. Track user signup events via OCaml
24. Track waitlist signup events via OCaml