Sacha Arbonel sachaarbonel

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.

	{
	"books": [
	{
	"title": "The Great Gatsby",
	"author": "F. Scott Fitzgerald",
	"summary": "The story primarily concerns the young and mysterious millionaire Jay Gatsby and his quixotic passion and obsession with the beautiful former debutante Daisy Buchanan."
	},
	{
	"title": "The Catcher in the Rye",
	"author": "J. D. Salinger",

	let kdtree = kd_tree::KdTree::build_by_ordered_float(vec![
	[1.0, 2.0, 3.0],
	[3.0, 1.0, 2.0],
	[2.0, 3.0, 1.0],
	]);

	// search the nearest neighbor
	let found = kdtree.nearest(&[3.1, 0.9, 2.1]).unwrap();

	let model = SentenceEmbeddingsBuilder::remote(SentenceEmbeddingsModelType::AllMiniLmL12V2).create_model()?;

	let sentences = [
	"this is an example sentence",
	"each sentence is converted"
	];

	let output = model.predict(&sentences);

	Color randomPastelColor(){
	final saturation = 0.4
	final lightness = 0.9
	final alpha = 1.0
	final hue = Random().nextDouble();
	final hsl = HSLColor(alpha, hue, saturation, lightness);
	return hsl.toColor();
	}

	// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
	// for details. All rights reserved. Use of this source code is governed by a
	// BSD-style license that can be found in the LICENSE file.

	import 'package:flutter/material.dart';

	void main() => runApp(MyApp());

	class FrogColor extends InheritedWidget {
	const FrogColor({

	import 'package:flutter/cupertino.dart';
	import 'package:imessage/message_list_view.dart';
	import 'package:stream_chat_flutter/stream_chat_flutter.dart'
	show
	LazyLoadScrollView,
	MessageListController,
	MessageListCore,
	StreamChannel,
	StreamChatCore;

	import 'package:flutter/cupertino.dart';
	import 'package:intl/date_symbol_data_local.dart';
	import 'package:stream_chat_flutter/stream_chat_flutter.dart'
	show
	Channel,
	ChannelListController,
	ChannelListCore,
	ChannelsBloc,
	LazyLoadScrollView,
	Level,

	Future<void> main() async {
	WidgetsFlutterBinding.ensureInitialized();
	final client = StreamChatClient('b67pax5b2wdq', logLevel: Level.INFO); //we want to see debug
	//logs in our terminal
	await client.connectUser(
	User(
	id: 'cool-shadow-7',
	extraData: {
	'image':
	'https://getstream.io/random_png/?id=cool-shadow-7&name=Cool+shadow',

	dependencies:
	stream_chat_flutter: ^1.3.0-beta