Zend Expressive Microservice Framework Blastoff

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Expressive Microservice Framework Blastoff By: Adam Culp Twitter: @adamculp https://joind.in/talk/142a9

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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

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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!!!

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4 Expressive Microservice Framework Blastoff ● I Help Build The Web

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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

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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

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7 Expressive Microservice Framework Blastoff ● Buzzword Bingo – We will mention many buzzwords, but...

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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

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9 Expressive Microservice Framework Blastoff ● But in PHP... – How to keep microservices light? – Microservices shouldn’t be heavy I’m a Microservice!!!

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10 Expressive Microservice Framework Blastoff ● Full Stack Frameworks Suck – Heavy and bloated – “Kitchen Sink” – “You don’t have to use everything, but its there...”

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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)

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12 Expressive Microservice Framework Blastoff ● PHP Ecosystem Facilitators – PHP 7 – Microframeworks – Libraries – Components – Containers – Composer

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13 Expressive Microservice Framework Blastoff ● All The Things!!! – So many tools: Monolog Whoops Flysystem IBMiToolkit OAuth2 Server https://github.com/ziadoz/awesome-php

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14 Expressive Microservice Framework Blastoff ● Communication Sucks – Say what!?! Monolog Whoops Flysystem IBMiToolkit OAuth2 Server

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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

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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

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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/

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18 Expressive Microservice Framework Blastoff ● Composer Install Script – Done right from the start All code available at: https://github.com/adamculp/expressive-blastoff

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19 Expressive Microservice Framework Blastoff ● Composer Install Script

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20 Expressive Microservice Framework Blastoff ● Composer Install Script – Minimal skeleton or full*? ● With or without samples

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21 Expressive Microservice Framework Blastoff ● Composer Install Script – Router options ● Aura.Router ● FastRoute* ● Zend Router

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22 Expressive Microservice Framework Blastoff ● Composer Install Script – Container options: (container interop) ● Aura.Di ● Pimple ● Zend ServiceManager*

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23 Expressive Microservice Framework Blastoff ● Composer Install Script – Template engine options: ● Plates ● Twig ● Zend View ● None*

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24 Expressive Microservice Framework Blastoff ● Composer Install Script – Error handler options: ● Whoops* ● None

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25 Expressive Microservice Framework Blastoff ● Structure – Folder structure of Zend Expressive Skeleton

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26 Expressive Microservice Framework Blastoff ● Skeleton Application

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27 Expressive Microservice Framework Blastoff ● Not MVC – Files and structure focused on Actions

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28 Expressive Microservice Framework Blastoff ● The Flow

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29 Expressive Microservice Framework Blastoff ● Initial File – Front controller (/public/index.php)

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30 Expressive Microservice Framework Blastoff ● Container Creation – We specified Zend ServiceManager (/config/container.php)

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31 Expressive Microservice Framework Blastoff ● Load Configs (/config/config.php)

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32 Expressive Microservice Framework Blastoff ● Load Dependencies – Items to be called as middleware in routes. (/config/autoload/routes.global.php)

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33 Expressive Microservice Framework Blastoff ● Load Routes – Matches path to middleware (Dependencies shown earlier) (/config/autoload/routes.global.php cont’d)

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34 Expressive Microservice Framework Blastoff ● Action Anatomy – Creates raw JSON response (/src/App/Action/PingAction.php)

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35 Expressive Microservice Framework Blastoff ● JSON Response – Created by action

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36 Expressive Microservice Framework Blastoff ● Let’s Create a Middleware!!!

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37 Expressive Microservice Framework Blastoff ● Header Middleware – Create class for new middleware (or include someone else’s)

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38 Expressive Microservice Framework Blastoff ● Header Middleware – The class to include the very important header (/src/App/Middleware/TheClacksMiddleware.php)

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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)

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40 Expressive Microservice Framework Blastoff ● Header Middleware – Header for every call now carries our important message

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41 Expressive Microservice Framework Blastoff ● Let’s Create a Database Connected Middleware!!! ● With Zend Db

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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!

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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)

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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)

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45 Expressive Microservice Framework Blastoff ● Database Connected Example With Zend Db – Add the new action to dependencies (/config/autoload/routes.global.php)

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46 Expressive Microservice Framework Blastoff ● Database Connected Example With Zend Db – Add the new route to dependencies (/config/autoload/routes.global.php cont’d)

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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)

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48 Expressive Microservice Framework Blastoff ● Database Connected Example With Zend Db – Create the action (view 1 of 2 - constructor) (/src/App/Action/UserListAction.php)

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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)

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50 Expressive Microservice Framework Blastoff ● Database Connected Example With Zend Db – Create the view template (/templates/app/user-list.phtml)

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51 Expressive Microservice Framework Blastoff ● Database Connected Example With Zend Db – Rejoice!

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52 Expressive Microservice Framework Blastoff ● Let’s Create a Database Connected Middleware!!! ● With Doctrine!!!

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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!

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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)

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55 Expressive Microservice Framework Blastoff ● Database Connected Example With Doctrine – Add the new route to dependencies (/config/autoload/routes.global.php)

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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)

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57 Expressive Microservice Framework Blastoff ● Database Connected Example With Doctrine – Create the action (view 1 of 2 - constructor) (/src/App/Action/UserDbalListAction.php)

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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)

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59 Expressive Microservice Framework Blastoff ● Database Connected Example With Doctrine – Create the view template (/templates/app/user-dbal-list.phtml)

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60 Expressive Microservice Framework Blastoff ● Database Connected Example With Doctrine – Rejoice!

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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

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62 Expressive Microservice Framework Blastoff ● Give Zend Expressive a Try...Today!!! – https://zendframework.github.io/zend-expressive/

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● 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