Async PHP Redux

Transcript

1. async php
2. disclaimers! ! ›❯ async is not commonplace ›❯ async requires work ›❯ hatters gonna hat
3. the problem! ! ›❯ scaling php from the inside is hard ›❯ persistent connections halt execution ›❯ synchronous core and history
4. synchronous requests! ! http request hits server → then you parse input → then you read the database → then you render the view → then you return the response
5. asynchronous requests! ! http request hits server → then you ask for parsed input ! you get parsed input → then you ask for a database read ! ...
6. fixing the problem! ! ›❯ does it need to be fixed? ›❯ hardware is cheaper than developers
7. queues
8. queue daemons! ! ›❯ beanstalkd ›❯ rabbit mq
9. queue services! ! ›❯ amazon sqs ›❯ iron mq
10. ›❯ composer require "illuminate/queue:4.1.0" ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) - Installing symfony/process (v2.4.4) Loading from cache
11. $queue = new Illuminate\Queue\Capsule\Manager(); ! $queue->addConnection([ "driver" => "beanstalkd", "host" => "localhost", "queue" => "default" ]); ! $queue->push("SendEmail",["message" => $message]);
12. class SendEmail { public function fire($job, $data) { // process the job // mark the job as handled with $job->release() } }
13. remember...! ! ›❯ queues are one-way ›❯ services have their quirks
14. learn more! ! ›❯ queues in laravel http://laravel.com/docs/queues ›❯ illuminate/queue https://github.com/illuminate/queue ›❯ beanstalkd http://kr.github.io/beanstalkd ›❯ rabbit mq https://www.rabbitmq.com ›❯ iron mq http://www.iron.io/mq ›❯ amazon sqs https://aws.amazon.com/sqs
15. gearman
16. gearman needs...! ! ›❯ a worker script ›❯ a manager daemon ›❯ a client script
17. how it works! ! client connects to daemon → then client adds task to queue → then daemon sends task to worker → then worker processes task → then worker sends result to daemon → then daemon sends result to client
18. ›❯ brew install gearmand ==> Downloading https://launchpad.net/gearmand/1.2/1.1.9/+download/ gearmand-1.1.9.tar.gz Already downloaded: /Library/Caches/Homebrew/gearman-1.1.9.tar.gz ==> Patching patching file libgearman-1.0/gearman.h ! ›❯ /usr/local/sbin/gearmand -d
19. $worker = new GearmanWorker(); $worker->addServer(); ! $worker->addFunction("handle", function($job) { // get the job data with $job->workload() // mark the job as handled with $job->handle() // return the result }); ! while ($worker->work());
20. $client = new GearmanClient(); $client->addServer(); ! $client->setCompleteCallback(function($task) { // get the result data with $task->data() }); ! $task = $client->addTask("handle", "the task data"); $client->runTasks();
21. learn more! ! ›❯ gearman http://gearman.org ›❯ homebrew http://brew.sh ›❯ docs http://www.php.net/manual/en/book.gearman.php
22. react php
23. what react is...! ! ›❯ react is a replacement for plain old php + apache ›❯ react is like the php equivalent of node js ›❯ react is still beta
24. what react is not...! ! ›❯ react is not an external module ›❯ react is not a framework ›❯ react is not a magic bullet
25. ›❯ composer require "react/react:0.4.0" ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) - Installing react/promise (v2.0.0) Loading from cache
26. require("vendor/autoload.php"); $loop = React\EventLoop\Factory::create(); $socket = new React\Socket\Server($loop); $http = new React\Http\Server($socket, $loop);
27. $app = function($request, $response) { $response->writeHead(200, [ "Content-Type" => "text/html" ]); ! $response->end("hello world"); }; ! $http->on("request", $app);
28. $port = 8080; ! echo "Server at http://127.0.0.1:{$port}"; ! $socket->listen($port); $loop->run();
29. ›❯ php "index.php" Server at http://127.0.0.1:8080 ! ›❯ curl -X GET "http://127.0.0.1:8080" hello world
30. remember...! ! ›❯ the server is a long-running script ›❯ unhandled exceptions and fatal errors kill it ›❯ timeouts do not apply ›❯ cli php.ini is used
31. routes! ! ›❯ download a router ›❯ define routes ›❯ dispatch requests
32. ›❯ composer require "nikic/fast-route:dev-master" ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) - Installing nikic/fast-route (dev-master 29c5bf7) Cloning 29c5bf70254d8ce59414646de3e9e43aafc9735e
33. function show($request, $response, $parameters) { $response->end("showing"); } ! function save($request, $response, $parameters) { $response->end("saving"); }
34. $dispatcher = FastRoute\simpleDispatcher( function(FastRoute\RouteCollector $collector) { $collector->addRoute("GET", "/products", "show"); $collector->addRoute("POST", "/products", "save"); } );
35. $app = function($request, $response) use ($dispatcher) { ! $route = $dispatcher->dispatch( $request->getMethod(), $request->getPath() );
36. switch($route[0]) { case FastRoute\Dispatcher::NOT_FOUND: // ... 404 Not Found break; ! case FastRoute\Dispatcher::METHOD_NOT_ALLOWED: $allowedMethods = $route[1]; // ... 405 Method Not Allowed break;
37. case FastRoute\Dispatcher::FOUND: $response->writeHead(200, [ "Content-Type" => "text/html" ]); ! call_user_func_array($route[1], [ $request, $response, $route[2] ]); ! break;
38. ›❯ curl -X GET "http://127.0.0.1:8080/products" showing ! ›❯ curl -X POST "http://127.0.0.1:8080/products" saving
39. sockets! ! ›❯ download ratchet ›❯ implement MessageComponentInterface ›❯ pass your subclass to Http\Server
40. ›❯ composer require "cboden/ratchet:0.3.0" ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) - Installing symfony/routing (v2.4.4) Loading from cache ! - Installing symfony/http-foundation (v2.4.4) Loading from cache
41. use Ratchet\ConnectionInterface; use Ratchet\MessageComponentInterface; ! class Chat extends React\Socket\Server implements MessageComponentInterface { }
42. require("vendor/autoload.php"); $loop = React\EventLoop\Factory::create(); // $socket = new React\Socket\Server($loop); $socket = new Chat($loop); $http = new React\Http\Server($socket, $loop);
43. var socket = new WebSocket("ws://127.0.0.1:8080"); ! socket.addEventListener("message", function(e) { console.log(JSON.parse(e.data)); }); ! socket.send(JSON.stringify({"foo" : "bar"});
44. public function onOpen(ConnectionInterface $socket) { $this->socket->send("connected"); } ! public function onMessage(ConnectionInterface $socket, $message) { $this->socket->send("message: {$message}"); }
45. learn more! ! ›❯ composer https://getcomposer.org ›❯ installing react php https://github.com/reactphp/react#install ›❯ learning react php http://reactphp.org ›❯ learning ratchet http://socketo.me
46. why bother?
47. high concurrency! ! ›❯ theoretically... ›❯ higher concurrency != faster
48. socket programming! ! ›❯ web sockets http://www.html5rocks.com/en/tutorials/websockets/basics ›❯ socket chat tutorial https://medium.com/laravel-4/eaa550829538
49. something new! ! ›❯ learning new language paradigms is great ›❯ event-based code may make cleaner code ›❯ async is useful and is being used in popular frameworks
50. thanks! ! ›❯ follow http://twitter.com/followchrisp ›❯ learn http://tutorials.io