Making your applications work together through interoperability

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MAKING YOUR APPLICATIONS WORK TOGETHER THROUGH INTEROPERABILITY SYMFONYCON BERLIN 2016 @MICHAELCULLUMUK

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ME?

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MICHAEL CULLUM @MICHAELCULLUMUK

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INTEROPERABILITY

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1994

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RASMUS LERDORF

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1998

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PHPLIB

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PHP EXTENSION AND APPLICATION REPOSITORY

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LOTS AND LOTS OF PROJECTS

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ECOSYSTEMS

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LACK OF CENTRALISATION

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LACK OF DEPENDENCY MANAGEMENT

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NO PRIMARY PACKAGE REPOSITORY

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HARD TO INCLUDE LIBS

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DIFFERENT PACKAGES  OWN ECOSYSTEMS  OWN CONFERENCES

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DIVIDED COMMUNITY

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ISLANDS

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= ISLANDS

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= ISLANDS

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= ISLANDS

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= ISLANDS

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= ISLANDS

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= ISLANDS

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ISLANDS

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BREAKING THE MOULD

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WORKING TOGETHER

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WORKING TOGETHER

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WORKING TOGETHER

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REINVENTING THE WHEEL

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SO WHAT ACTUALLY IS THE FIG?

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PHP CONGRESS

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UNITED NATIONS OF PHP

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PHP FRAMEWORK INTEROPERABILITY GROUP

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PHP STANDARDS RECOMMENDATION

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INTEROPERABILITY

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PSRS

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$logger->critical( 'An exceptional exception occured' ); PSR-3: LOGGING $logger->emergency( ‘Nicolas merged a Parse Error into Symfony’ array('repository' => ‘symfony/symfony') );

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PSR-6: CACHING $america = $cachePool->hasItem('trumpPresidency'); // FALSE $ryan = $cachePool->getItem('RyanStatus'); // CacheItem Object $ryan->get(); // ‘Not here' $ryan->set(‘Looking after his new baby') $ryan->expiresAfter('86400'); $cachePool->save($ryan);

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PSR-7: HTTP MESSAGES

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PSR-11: CONTAINER INTERFACE /** * Describes the interface of a container that exposes methods to read its entries. */ interface ContainerInterface { /** * Finds an entry of the container by its identifier and returns it. * */ public function get($id); /** * Returns true if the container can return an entry for the given identifier. * Returns false otherwise. * */ public function has($id); }

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PSR-13  PSR-14  PSR-15  PSR-16  PSR-17

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- LIBRARY - DECOUPLED BUSINESS LOGIC - BRIDGING APPLICATIONS

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LIBRARY PERSPECTIVE

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DEPENDENCY HELL

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DEPENDENCY HELL Library 1 Library 2 Library 3 Application Business Logic Monolog Symfony Cache Pimple Klogger Stash Zend Framework Analog PHP Cache PHP League Container Monolog Symfony Cache Symfony DI PSR-3 Logger PSR-6 Logger PSR-11 DIC PSR-3 Logger PSR-6 Logger PSR-11 DIC PSR-3 Logger PSR-6 Logger PSR-11 DIC PSR-3 Logger PSR-6 Logger PSR-11 DIC

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▸ Monolog  Klogger —> PSR-3 Logging Library —> Monolog  Analog ▸ Symfony Cache  Stash —> PSR-6 Caching Library —> Symfony Cache  PHP Cache ▸ Pimple  Zend Framework —> PSR-11 Container —> Symfony DI  PHP League Container  Symfony DI TITLE TEXT

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DROP IN REPLACEMENTS

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SWAPPING OUT A LIBRARY DURING DEVELOPMENT

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BUSINESS LOGIC PERSPECTIVE

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CHANGING FRAMEWORKS

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ERRR WAT?

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BUSINESS LOGIC SHOULD BE JUST THAT

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▸Business Logic ▸Libraries/Frameworks to do technical tasks ▸Glue WHAT AN APPLICATION SHOULD CONSIST OF

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SEPARATION OF CONCERNS

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WHAT CAN WE DECOUPLE?

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10%

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CONTROLLERS

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HTTP REQUEST/ RESPONSE

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FORM PROCESSING

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RENDERING A TEMPLATE

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FORMS, VALIDATORS ETC.

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ENTITIES

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MODEL

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CONFIGURATION

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INTEGRATING APPLICATIONS

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DATABASE CONNECTIONS

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USER PROVIDERS / SESSIONS

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TEMPLATING

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API

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STANDARDS OR ABSTRACTION LIBRARIES?

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ABSTRACTION LIBRARIES

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BRIDGES

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INTERFACES

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INTERFACES - STANDARDS

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INTEROPERABILITY

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LIBRARIES DROP-IN

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LIBRARY DEPENDENCY RESOLUTION

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REDUCING DUPLICATE FUNCTIONING LIBRARIES

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SEPARATION OF CONCERNS

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SEPARATION OF CONCERNS (BUSINESS LOGIC)

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ACCOMPLISHABLE BY:

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INTERFACES

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ABSTRACTION LIBRARIES

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BRIDGES

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THANKS @MICHAELCULLUMUK

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BIT.LY/SFCON-BERLIN @MICHAELCULLUMUK

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MAKING YOUR APPLICATIONS WORK TOGETHER THROUGH INTEROPERABILITY SYMFONYCON BERLIN 2016 @MICHAELCULLUMUK