Let the others do the heavy lifting

Let the others do the heavy lifting - boost your Ruby app with Java -

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max ! klappradla " klappradla # klappradla.me

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limits

GIL

blocking IO

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non-blocking IO

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“…gain the performance and concurrency benefits of Java without writing any Java code or XML” -joe kutner-

# ratpack.io

“Ratpack is a set of Java libraries for building modern HTTP applications”

“It is built on Java 8, Netty and reactive principles" # netty.io

“It provides just enough for writing practical, high performance, apps.”

code

public class Main { public static void main(String... args) throws Exception { RatpackServer.start(server -> server .handlers(chain -> chain .get(ctx -> ctx.render("Hello World")) ) ); } } # https:/ /ratpack.io/manual/current/launching.html#launching

# Gemfile gem 'jbundler' # Jarfile jar 'io.ratpack:ratpack-core', '1.4.0' jar 'org.slf4j:slf4j-simple', '1.7.20'

$ bundle install

$ jbundle install

require 'java' require 'jruby/core_ext' require 'bundler/setup' Bundler.require java_import 'ratpack.server.RatpackServer' RatpackServer.start do |server| server.handlers do |chain| chain.get do |ctx| ctx.render 'Hello World from Ratpack / jRuby' end end end # github.com/klappradla/jruby_ratpack_examples/hello_world

# server.rb RatpackServer.start do |server| server.handlers do |chain| chain.get do |ctx| ctx.render 'Hello World from Ratpack / jRuby' end chain.all(Handler::Default) end end # handler/default.rb module Handler class Default def self.handle(ctx) ctx.render 'Nothing here, sorry ¯\_(ツ)_/¯' end end end # https:/ /ratpack.io/manual/current/api/ratpack/handling/Handler.html

blocking IO

java_import 'ratpack.server.RatpackServer' java_import 'ratpack.exec.Blocking' require 'json' RatpackServer.start do |server| server.handlers do |chain| chain.get('music') do |ctx| Blocking.get do DB[:albums].all end.then do |albums| ctx.render(JSON.dump(albums)) end end end end # https:/ /ratpack.io/manual/current/async.html#performing_blocking_operations_eg_io

# server RatpackServer.start do |server| server.handlers do |chain| chain.get('music', Handler::Music) end end # github.com/klappradla/jruby_ratpack_examples/db_example

module Handler class Music class << self def handle(ctx) get_data.then do |data| render(ctx, data) end end private def get_data Blocking.get { DB[:albums].all } end def render(ctx, data) ctx.render(Jackson.json(data)) end end end end # github.com/klappradla/jruby_ratpack_examples/db_example

non-blocking HTTP

class Server def self.run RatpackServer.start do |server| server.handlers do |chain| chain.all(RequestLogger.ncsa) chain.get('music', Handler::Music) chain.get('planets', Handler::Planets) chain.all(Handler::NotFound) end end end end # github.com/klappradla/jruby_ratpack_examples/http_example

module Handler class Base def self.handle(args) new(*args).handle end def initialize(ctx) @ctx = ctx end def handle raise NotImplementedError end private attr_reader :ctx def response @response ||= ctx.get_response end end end # github.com/klappradla/jruby_ratpack_examples/http_example

module Handler class Planets < Base URL = java.net.URI.new('http://swapi.co/api/planets') def handle call_api.then do |resp| render(resp) end end private def call_api client.get(URL) end def client ctx.get(HttpClient.java_class) end def render(resp) response.send(‘application/json;charset=UTF-8', resp.get_body.get_text) end end end # github.com/klappradla/jruby_ratpack_examples/http_example

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# github.com/klappradla/jruby_ratpack_examples/sinatra

# sinatra Running 1m test @ http://localhost:5050 4 threads and 100 connections Thread Stats Avg Stdev Max +/- Stdev Latency 302.15ms 417.23ms 1.99s 84.58% Req/Sec 122.99 63.97 380.00 66.50% 29176 requests in 1.00m, 83.26MB read Socket errors: connect 0, read 0, write 0, timeout 552 Non-2xx or 3xx responses: 9735 Requests/sec: 485.58 Transfer/sec: 1.39MB # ratpack Running 1m test @ http://localhost:5050 4 threads and 100 connections Thread Stats Avg Stdev Max +/- Stdev Latency 183.24ms 255.69ms 1.97s 86.30% Req/Sec 328.76 141.23 830.00 68.23% 78379 requests in 1.00m, 200.23MB read Socket errors: connect 0, read 0, write 0, timeout 13 Non-2xx or 3xx responses: 26268 Requests/sec: 1305.99 Transfer/sec: 3.34MB # github.com/klappradla/jruby_ratpack_examples/benchmarks

# github.com/klappradla/jruby_ratpack_examples/benchmarks # sinatra Running 1m test @ http://localhost:5050 4 threads and 100 connections Thread Stats Avg Stdev Max +/- Stdev Latency 302.15ms 417.23ms 1.99s 84.58% Req/Sec 122.99 63.97 380.00 66.50% 29176 requests in 1.00m, 83.26MB read Socket errors: connect 0, read 0, write 0, timeout 552 Non-2xx or 3xx responses: 9735 Requests/sec: 485.58 Transfer/sec: 1.39MB # ratpack Running 1m test @ http://localhost:5050 4 threads and 100 connections Thread Stats Avg Stdev Max +/- Stdev Latency 183.24ms 255.69ms 1.97s 86.30% Req/Sec 328.76 141.23 830.00 68.23% 78379 requests in 1.00m, 200.23MB read Socket errors: connect 0, read 0, write 0, timeout 13 Non-2xx or 3xx responses: 26268 Requests/sec: 1305.99 Transfer/sec: 3.34MB

# github.com/jruby/jruby/wiki/AboutJRuby # github.com/klappradla/jruby_ratpack_examples # blog.heroku.com/reactive_ruby_building_real_time_apps_with_jruby_and_ratpack