hariharan-uno

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

• They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

hariharan-uno

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

hariharan-uno

package main

// @lizrice, mostly copied from @doctor_julz: https://gist.github.com/julz/c0017fa7a40de0543001

import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
)

hariharan-uno

package main

import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
)

func main() {

hariharan-uno

  import unittest
  from pyramid import testing
  from paste.deploy.loadwsgi import appconfig
  
  from webtest import TestApp
  from mock import Mock
  
  from sqlalchemy import engine_from_config
  from sqlalchemy.orm import sessionmaker
  from app.db import Session