asynchronous php: no longer a hack job

Asynchronous PHP: No Longer a Hack JobAsynchronous PHP: No Longer a Hack Job

Asynchronous PHPAsynchronous PHPNo Longer a Hack JobNo Longer a Hack Job

Ben DechraiBen Dechrai@bendechrai@bendechrai

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What IsAsynchronous?


Synchronous Eggs Benedict

Make Hollandaise Sauce● separate eggs● melt butter● whisk

Poach Eggs

Fry Bacon

Saute Spinach

Preheat Plates

Toast Bread

7 minutes

3 min

3 min

2 min

1

1

Total 17 minutes, and cold Hollandaise sauce :(


Synchronous Eggs Benedict

Make Hollandaise Sauce● separate eggs● melt butter● whisk

Poach Eggs

Fry Bacon

Saute Spinach

Preheat Plates

Toast Bread

Total 17 minutes, and cold Hollandaise sauce :(


Asynchronous Eggs Benedict

Make Hollondaise Sauce● separate eggs● melt butter● whisk

Poach Eggs

Fry Bacon

Saute Spinach

Preheat Plates

Toast Bread

Total 7 minutes, and hot Hollandaise sauce :)


Synchronous PHP

Full HTTP Request

Create Order

Authorize Payment

Send Email

Send order towarehouse API

Show Confirmation

Update Sales Dashboard

A long running process on checkout


Full HTTP Request

Asynchronous PHP

Create Order

Authorize Payment

Send Email

Send order towarehouse API

Show Confirmation

Update Sales Dashboard

Much faster checkout process!


Manual AsynchronicityManual Asynchronicity


shell_exec

● not available on all systems● allows for custom php.ini● logs everything● two files, harder to debug/maintain


detach client

● all code in one place● potentially easier to integrate with a framework● not reliable - requires FPM/CGI mode


cURL

● must be accessiblevia web request


Demo 1Demo 1

React PHPReact PHP


Summary

● React PHP

– still suffers underlying PHP issues● one process to rule them all● memory overflow

– easier to use, especially with composer


Synchronous PHP Chat

Server

Log File

User 1 User 2

Send SendRead Read

Append Read

Read since when?

Log file size / rotation


Asynchronous PHP Chat

Server

Log File

User 1 User 2

Append

Socket Socket


Demo 3Demo 3

Ratchet on ReactRatchet on React


Summary

● Ratchet

– takes the awesomeness of React

– adds Web Sockets● one process to rule them all● memory overflow


Where To From Here?

● libevent

– replaces the event loop to improve performance● Deployment

– apache doesn't handle web sockets at all, so use varnish or haproxy

● route restests to web server or web socket as required

– make sure the Ratchet app doesn't die● use suvervisord or similar


Credits

● Eggs Benedict by Jiewa Vieri

References

● Methods for asynchronous processes in PHP by Dave Newson

● PHP Is Meant to Die by Software Gunslinger

● React PHP

● Ratchet

https://www.flickr.com/photos/geewaq/8652266962

http://www.davenewson.com/dev/methods-for-asynchronous-processes-in-php

http://software-gunslinger.tumblr.com/post/48215406921/php-is-meant-to-die-continued

http://reactphp.org/

http://socketo.me/


Thank You!Thank You!Questions?Questions?

Ben DechraiBen Dechrai@bendechrai@bendechrai

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