Zend Expressive Microservice Framework Blastoff

With PHP frameworks being more decoupled than ever, and with the help of package and dependency managers, large and heavy PHP frameworks are a thing of the past. Modern PHP developers now have a wealth of libraries available specializing at certain tasks, and microservices are fast becoming a preferred way to architect applications. But many don't know how to start, and get thrown in the deep end.

This talk will briefly introduce what microservices are, and how to create them using middleware. Then show how to build using the Zend Expressive microframework leveraging components of Zend Framework, and other libraries, to quickly create awesome things without requiring a full stack framework. Resources for reference and continued learning will also be shared.

Transcript

1. Expressive Microservice Framework Blastoff By: Adam Culp Twitter: @adamculp https://joind.in/talk/142a9
2. 2 Expressive Microservice Framework Blastoff • About me – OSS Contributor – PHP Certified – Zend Certification Advisory Board – PHP-Fig voting member (IBM i Toolkit) – Consultant at Zend Technologies – Organizer SoFloPHP (South Florida) – Organizer SunshinePHP (Miami) – Long distance (ultra) runner – Photography Enthusiast – Judo Black Belt Instructor
3. 3 Expressive Microservice Framework Blastoff • About me – OSS Contributor – PHP Certified – Zend Certification Advisory Board – PHP-Fig voting member (IBM i Toolkit) – Consultant at Zend Technologies – Organizer SoFloPHP (South Florida) – Organizer SunshinePHP (Miami) – Long distance (ultra) runner – Photography Enthusiast – Judo Black Belt Instructor PHP Ninja!!!
4. 4 Expressive Microservice Framework Blastoff • I Help Build The Web
5. 5 Expressive Microservice Framework Blastoff • Frameworks Suck – Complicated • Routing • Databases • Connectivity • Communication (HTTP, API) • Information Container • GUI (html, javascript, templates, CSS,) • Errors and Exceptions • Validation and Cleansing Data • State
6. 6 Expressive Microservice Framework Blastoff • Frameworks Web Applications Suck – Complicated • Routing • Databases • Connectivity • Communication (HTTP, API) • Information Container • GUI (html, javascript, templates, CSS,) • Errors and Exceptions • Validation and Cleansing Data • State
7. 7 Expressive Microservice Framework Blastoff • Buzzword Bingo – We will mention many buzzwords, but...
8. 8 Expressive Microservice Framework Blastoff • Microservice – All the buzz is “microservices”. – ...complex applications are composed of small, independent processes communicating with each other using language-agnostic APIs. These services are small building blocks, highly decoupled and focused on doing a small task, facilitating a modular approach to system-building. – Wikipedia
9. 9 Expressive Microservice Framework Blastoff • But in PHP... – How to keep microservices light? – Microservices shouldn’t be heavy I’m a Microservice!!!
10. 10 Expressive Microservice Framework Blastoff • Full Stack Frameworks Suck – Heavy and bloated – “Kitchen Sink” – “You don’t have to use everything, but its there...”
11. 11 Expressive Microservice Framework Blastoff • Need For Speed – What does a microservice “need”? • HTTP message layer • Routing capabilities • Dependency injection – Testable – Swappable pieces • Templating – Optional (APIs may not need it, except documentation)
12. 12 Expressive Microservice Framework Blastoff • PHP Ecosystem Facilitators – PHP 7 – Microframeworks – Libraries – Components – Containers – Composer
13. 13 Expressive Microservice Framework Blastoff • All The Things!!! – So many tools: Monolog Whoops Flysystem IBMiToolkit OAuth2 Server https://github.com/ziadoz/awesome-php
14. 14 Expressive Microservice Framework Blastoff • Communication Sucks – Say what!?! Monolog Whoops Flysystem IBMiToolkit OAuth2 Server
15. 15 Expressive Microservice Framework Blastoff • PSR-7 Doesn’t Suck – Part of PHP-Fig.org recommendations – HTTP Messages • Request from client to server • Response from server to client – Interfaces • Psr\Http\Message\MessageInterface – Psr\Http\Message\RequestInterface • Psr\Http\Message\ServerRequestInterface – Psr\Http\Message\ResponseInterface • Psr\Http\Message\StreamInterface • Psr\Http\Message\UploadFileInterface • Psr\Http\Message\UriInterface
16. 16 Expressive Microservice Framework Blastoff • Middleware – ...Middleware makes it easier for software developers to implement communication and input/output, so they can focus on the specific purpose of their application. – Wikipedia – Lighter applications (only what is needed) – Composed of layers
17. 17 Expressive Microservice Framework Blastoff • Zend Expressive – Microframework built around middleware – Very lean runtime – Built to consume PSR-7 – Use for building: • APIs • Web applications • Single page sites – Choose your own stack – Great documentation • https://zendframework.github.io/zend-expressive/
18. 18 Expressive Microservice Framework Blastoff • Composer Install Script – Done right from the start All code available at: https://github.com/adamculp/expressive-blastoff
19. 19 Expressive Microservice Framework Blastoff • Composer Install Script
20. 20 Expressive Microservice Framework Blastoff • Composer Install Script – Minimal skeleton or full*? • With or without samples
21. 21 Expressive Microservice Framework Blastoff • Composer Install Script – Router options • Aura.Router • FastRoute* • Zend Router
22. 22 Expressive Microservice Framework Blastoff • Composer Install Script – Container options: (container interop) • Aura.Di • Pimple • Zend ServiceManager*
23. 23 Expressive Microservice Framework Blastoff • Composer Install Script – Template engine options: • Plates • Twig • Zend View • None*
24. 24 Expressive Microservice Framework Blastoff • Composer Install Script – Error handler options: • Whoops* • None
25. 25 Expressive Microservice Framework Blastoff • Structure – Folder structure of Zend Expressive Skeleton
26. 26 Expressive Microservice Framework Blastoff • Skeleton Application
27. 27 Expressive Microservice Framework Blastoff • Not MVC – Files and structure focused on Actions
28. 28 Expressive Microservice Framework Blastoff • The Flow
29. 29 Expressive Microservice Framework Blastoff • Initial File – Front controller (/public/index.php)
30. 30 Expressive Microservice Framework Blastoff • Container Creation – We specified Zend ServiceManager (/config/container.php)
31. 31 Expressive Microservice Framework Blastoff • Load Configs (/config/config.php)
32. 32 Expressive Microservice Framework Blastoff • Load Dependencies – Items to be called as middleware in routes. (/config/autoload/routes.global.php)
33. 33 Expressive Microservice Framework Blastoff • Load Routes – Matches path to middleware (Dependencies shown earlier) (/config/autoload/routes.global.php cont’d)
34. 34 Expressive Microservice Framework Blastoff • Action Anatomy – Creates raw JSON response (/src/App/Action/PingAction.php)
35. 35 Expressive Microservice Framework Blastoff • JSON Response – Created by action
36. 36 Expressive Microservice Framework Blastoff • Let’s Create a Middleware!!!
37. 37 Expressive Microservice Framework Blastoff • Header Middleware – Create class for new middleware (or include someone else’s)
38. 38 Expressive Microservice Framework Blastoff • Header Middleware – The class to include the very important header (/src/App/Middleware/TheClacksMiddleware.php)
39. 39 Expressive Microservice Framework Blastoff • Header Middleware – Add the middleware to the container – Set it to always be included (/config/autoload/middleware-pipeline.global.php)
40. 40 Expressive Microservice Framework Blastoff • Header Middleware – Header for every call now carries our important message
41. 41 Expressive Microservice Framework Blastoff • Let’s Create a Database Connected Middleware!!! • With Zend Db
42. 42 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – First we need a database connection. • Will use Zend-Db for this example, but could be anything. • Composer to the rescue!
43. 43 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Specify adapter (provided by Zend/Db/ConfigProvider() in this case) (/config/autoload/db.global.php)
44. 44 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Provide local/instance configuration • This would be driver and credentials • (credentials not needed with sqlite) (/config/autoload/db.local.php)
45. 45 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Add the new action to dependencies (/config/autoload/routes.global.php)
46. 46 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Add the new route to dependencies (/config/autoload/routes.global.php cont’d)
47. 47 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Create a factory to pass items needed by the action (/src/App/Action/UserListFactory.php)
48. 48 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Create the action (view 1 of 2 - constructor) (/src/App/Action/UserListAction.php)
49. 49 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Create the action (view 2 of 2 - __invoke method) (/src/App/Action/UserListAction.php cont’d)
50. 50 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Create the view template (/templates/app/user-list.phtml)
51. 51 Expressive Microservice Framework Blastoff • Database Connected Example With Zend Db – Rejoice!
52. 52 Expressive Microservice Framework Blastoff • Let’s Create a Database Connected Middleware!!! • With Doctrine!!!
53. 53 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – First we need a database connection. • Will use Doctrine DBAL for this example, but could be anything. • Composer to the rescue!
54. 54 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Provide local/instance configuration • This would be driver and credentials • (credentials not needed with sqlite) (/config/autoload/dbal.local.php)
55. 55 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Add the new route to dependencies (/config/autoload/routes.global.php)
56. 56 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Create a factory to pass items needed by the action (/src/App/Action/UserDbalListFactory.php)
57. 57 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Create the action (view 1 of 2 - constructor) (/src/App/Action/UserDbalListAction.php)
58. 58 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Create the action (view 2 of 2 - __invoke method) (/src/App/Action/UserDbalListAction.php cont’d)
59. 59 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Create the view template (/templates/app/user-dbal-list.phtml)
60. 60 Expressive Microservice Framework Blastoff • Database Connected Example With Doctrine – Rejoice!
61. 61 Expressive Microservice Framework Blastoff • With Zend Expressive: – Easy to build middleware – Lightweight, add what is really needed – Fast – no extra load – Microservices in PHP are better
62. 62 Expressive Microservice Framework Blastoff • Give Zend Expressive a Try...Today!!! – https://zendframework.github.io/zend-expressive/
63. • Thank you! • Code at: https://github.com/adamculp/expressive-blastoff • Please rate at: https://joind.in/talk/142a9 Adam Culp http://www.rungeekradio.com http://www.geekyboy.com Twitter @adamculp Expressive Microservice Framework Blastoff