Expressive Microservice Framework Blastoff

Expressive Microservice
Framework Blastoff
By:
Adam Culp
Twitter: @adamculp
https://joind.in/talk/cd0e6

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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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●
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
I am the
PHP Ninja!!!

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I Help Build The Web

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Frameworks Suck
– Complicated
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Routing
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Databases
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Connectivity
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Communication (HTTP, API)
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Information Container
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GUI (html, javascript, templates, CSS,)
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Errors and Exceptions
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Validation and Cleansing Data
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State

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Frameworks Web Applications Suck
– Complicated
●
Routing
●
Databases
●
Connectivity
●
Communication (HTTP, API)
●
Information Container
●
GUI (html, javascript, templates, CSS,)
●
Errors and Exceptions
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Validation and Cleansing Data
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State

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Buzzword Bingo
– We will mention many buzzwords, but...

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

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Full Stack Frameworks Suck
– Heavy, bloated, slow
– “Lock” you in
– “Kitchen Sink”
– “You don’t need everything, but its there...”

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Need For Speed
– What does a microservice “need”?
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HTTP message layer
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Routing capabilities
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Dependency injection
– IoC
– Testable
– Swappable pieces
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Templating
– Optional (APIs may not need it, except documentation)

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PHP Ecosystem Facilitators
– Composer
– Components
– Libraries
– Containers
– Microframeworks
– PHP 7

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

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Expressive
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Communication Sucks
– Say what!?!
Monolog
Whoops
Flysystem
IBMiToolkit
OAuth2 Server

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PSR-15 (preferred)
– Part of PHP-Fig.org recommendations
– Must implement
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PsrHttpServerMiddlewareMiddlewareInterface
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Middleware dispatching systems must implement
– PsrHttpServerMiddlewareDelegateInterface
– PSR-7 Double Pass
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PsrHttpMessageMessageInterface
– PsrHttpMessageRequestInterface
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PsrHttpMessageServerRequestInterface
– PsrHttpMessageResponseInterface
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PsrHttpMessageStreamInterface
● PsrHttpMessageUploadFileInterface
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PsrHttpMessageUriInterface

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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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Zend Expressive
– Microframework built around middleware
– Versions
● Version 1 based on PSR-7
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Version 2 based on PSR-15
– Very lean runtime
– Use for building:
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APIs
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Web applications
● Single page sites
– Choose your own stack
– Great documentation
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https://zendframework.github.io/zend-expressive/

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Zend Expressive
– Not built on Zend Framework, but build by ZF team
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Zend Framework 3 does include some components now
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You choose the stack

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Composer Install Script
– Done right from the start
All code available at: https://github.com/adamculp/expressive-blastoff

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●

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– Minimal skeleton or full?
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With or without samples
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Flat or with modules!

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– Container options: (container interop)
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Aura.Di
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Pimple
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Zend ServiceManager*

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– Router options
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Aura.Router
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FastRoute*
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Zend Router

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– Template engine options:
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Plates
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Twig
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Zend View
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None*

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– Error handler options:
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Whoops*
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None

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Structure
– Folder structure of Zend Expressive Skeleton

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Skeleton Application

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Not MVC
– Files and structure focused on Actions

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The Flow

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Initial File
– Front controller (/public/index.php)

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Container Creation
– We specified Zend ServiceManager
(/config/container.php)

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Load Configs
(/config/config.php)

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Load Configs
(/src/App/src/ConfigProvider.php)

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Load More Configs

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Load Pipelines
– Items to be called as the middleware pipeline.
(/config/pipeline.php)

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Load Pipelines
– Items to be called as routed middleware.
(/config/routes.php)

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Action Anatomy
– Creates raw JSON response
(/src/App/src/Action/PingAction.php)

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JSON Response
– Created by action

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Let’s Create a Middleware!!!

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Header Middleware
– Create class for new middleware (or include someone else’s)

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Header Middleware
– The class to include the very important header
(/src/App/src/Middleware/TheClacksMiddleware.php)

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Header Middleware
– Add the middleware to the pipeline
– It will always be included
(/config/pipeline.php)

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Header Middleware
– Header for every call now carries our important message

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Let’s Create a Database Connected Middleware!!!
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With Zend Db

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Database Connected Example With Zend Db
– First we need a database connection.
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Will use Zend-Db for this example, but could be anything.
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Composer to the rescue!

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– Specify adapter (via Zend/Db/ConfigProvider() in this case)
(/config/config.php)

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– Provide local/instance configuration
● This would be driver and credentials
● (credentials not needed with sqlite)
(/config/autoload/db.local.php)

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– Add the new action to dependencies
(/config/autoload/routes.global.php)

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– Add the new route to dependencies
(/config/routes.php

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– Create a factory to pass items needed by the action
(/src/App/src/Action/UserListFactory.php)

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– Create the action (view 1 of 2 - constructor)
(/src/App/src/Action/UserListAction.php)

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– Create the action (view 2 of 2 - __invoke method)
(/src/App/src/Action/UserListAction.php cont’d)

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– Create the view template
(/templates/app/user-list.phtml)

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– Rejoice!

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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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Give Zend Expressive a Try...Today!!!
– https://zendframework.github.io/zend-expressive/

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Thank you!
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Code at: https://github.com/adamculp/expressive-blastoff
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Please rate at: https://joind.in/talk/cd0e6
Adam Culp
http://www.rungeekradio.com
http://www.geekyboy.com
Twitter @adamculp

Expressive Microservice Framework Blastoff

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