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3 November 2010

Matthew Weier O'Phinney

Project Lead

Ralph Schindler

Software Engineer IntroducingIntroducingZend Framework 2.0Zend Framework 2.0

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Some History

Summer 2005:Coding begins on Zend Framework, with a

handful of cherry-picked partners.

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Some History

Fall 2005:First annualZendCon

Andi and Zeev announce the PHP Community

Process, which includes involvement in the

Eclipse Foundation, a relaunch of Zend's

Developer Zone, andZend Framework.

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Some History

March 2006:Zend Framework0.1.0released

Project opened up to the public for

contributions; contributions require a

Contributor License Agreement.

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Some History

July 2007:Zend Framework1.0.0released

Project includes MVC stack, Table and Row

Data Gateways, loads of Service APIs,

Authentication and Authorization layers, service

providers, and more.

Still largely deemed a work in progress.

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Some History

March 2008:Zend Framework1.5.0released

Includes Zend_Form and Zend_Layout, and

many Zend_View enhancements.

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Some History

September 2008:Zend Framework1.6.0released

Includes Dojo Toolkit integration, functional test

utilities.

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Some History

November 2008:Zend Framework1.7.0released

Includes AMF support, performance

improvements.

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Some History

April 2009:Zend Framework1.8.0released

Includes Zend_Application, Zend_Tool.

First release widely seen as providing a full

stack.

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Some History

July 2009:Zend Framework1.9.0released

Includes reworked feed component,

Zend_Feed_Reader, and tons of community-

driven enhancements.

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Some History

October 2009:First monthly community bug hunts launched.

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Some History

January 2010:Zend Framework1.10.0released

Includes Zend_Feed_Writer, re-organized

documentation, and community-driven

improvements.

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Some History

February 2010:Development on Zend Framework2.0begins

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Some History

June 2010:Formation of the Community Review Team

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Some History

November 2010:Zend Framework1.11.0released

Includesmobilesupport and

SimpleCloudAPI.

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Some History

The future?

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Revolution?Revolution?

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Evolution.Evolution.

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Incremental Improvements

Autoload only (strip require_once calls)

Conversion to PHP namespaces

Refactor and standardize exceptions usage

Refactor and consistently implement a

single plugin loading strategy

Refactor to use PHP 5.3-specific paradigms

where they fit

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Rewrite onlyRewrite onlywhere it makeswhere it makes

sensesense

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Zend_Db

Difficult to get the underlying connectionand share it between instances or different

classes.

Difficult to get schema metadata in aconsistent fashion.

Difficult to extend.

Difficult to add pre/post tasks.

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Zend_Session

Black-box design != testable

Namespace storage incompatible with

$_SESSION

Many incompatibilities with ext/session

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useZend\Session\SessionManager,Zend\Session\ContainerasSessionContainer;

$manager =newSessionManager(array(

'class' =>'My\Custom\SessionConfiguration', 'storage'=>'My\Custom\SessionStorage',));$container =newSessionContainer('Foo', $manager);$container['somekey'] ='somevalue';

$container->setExpirationHops(2);

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Filters and Validators

Static access and chain usage were mixedin the same object

Did not use common plugin loading

methodology

Paradigms required in Filter_Input and

Form were not supported

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namespaceZend\Validator;

if(StaticValidator::execute($value,'int')) { // passed validation

}

$chain =newValidatorChain();$chain->addValidator(newInt(),true) ->addValidator(newGreaterThan(10));

if($chain->isValid($value)) { // passed validation}

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AddAddfeatures favoringfeatures favoring

extensibilityextensibility

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Examples

SignalSlotFilterChain

SPL extensions (SplStack, SplQueue)

PluginBroker

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Favor the ExplicitFavor the Explicit

Okay, notOkay, not thatthatkind of explicitkind of explicit

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Magic isMagic issometimessometimes

too arcanetoo arcane

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echo $this->headLink()->appendStylesheet('foo.css');

/*** Hits Zend_View::__call()* Calls Zend_View::getHelper()* Calls Zend_View::_getPlugin()* Calls Zend_Loader_PluginLoader::load()

* Calls Zend_Loader::isReadable()* Calls call_user_func (hits autoloader...)* which calls Zend_Loader::loadClass* which calls Zend_Loader::loadFile* which calls include_once* Instantiates helper* Calls method on helper via call_user_func_array()* Returns helper instance* Call method on instance (hits __call...))*/

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(hidden) automation(hidden) automation

makes learning hardmakes learning hard

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classFooController

extendsZend_Controller_Action{ public functionsomeAction() {

$this->view->foo='bar';

}}

Where is

this defined? When isit rendered?

What about

layouts?

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Explicit code isExplicit code is

easier toeasier tounderstandunderstand

$this->broker('head_link')->appendStylesheet('foo.css');

/*** Hits PhpRenderer::broker()* Calls HelperBroker::load()* Calls HelperLoader::load()* Hits autoloader* which simply does an include_once* Instantiates helper* Calls method on helper

*/

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Explicit code isExplicit code is

easier toeasier toprofileprofile

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Explicit code isExplicit code is

easier toeasier tomaintainmaintain

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Optimize forOptimize for

performanceperformance

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Profiling

Profile to determinewhere the pain

points are

Look for big gains

primarily

Fix them

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Autoloading: Problems

Class Maps are fastestBut they require maintenance

Using the include_path is slow

Not using it requires maintenance

Using the include_path is most flexible

But slower than alternatives

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Autoloading: Solutions

Ship a ClassMapAutoloader by defaultClass maps for full ZF library, and per-component

Tools for generating class maps

Ultimate in performance

StandardAutoloader requires

namespace/path pairs

Flexibility andperformance during development

StandardAutoloader can act as a fallback

autoloader

Flexibility at the cost of performance

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// .classmap.phpreturn array( 'Foo\SomeController'=>__DIR__.

'/foo/controllers/SomeController.php', 'Foo\Model\Bar' =>__DIR__.'/foo/models/Bar.php',

);

// ClassMapAutoloaderrequire_once'Zend/Loader/ClassMapAutoloader.php';$loader =newZend\Loader\ClassMapAutoloader( './.classmap.php');

$loader->register();

$bar =newFoo\Model\Bar();

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// StandardAutoloaderrequire_once'Zend/Loader/StandardAutoloader.php';$loader =newZend\Loader\StandardAutoloader(array( 'namespaces'=>array( 'Foo'=>__DIR__.'/library/Foo'),));$loader->register();

$bar =newFoo\Model\Bar();

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Plugin Loading: Problems

Path stack-based autoloading is sloooowPrefix paths are hard to grasp

Particularly when coupled with stacks

Overriding the paths without propagating

paths is hard

Case sensitivity becomes an issue

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Plugin Loading: Problems

Current solution only solves the classloading aspect of plugin loading

Instantiation happens differently per

component

Persistence happens differently per

component

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Plugin Loading: Solutions

Class alias based maps by defaultLoaders are coupled with brokers

Handle instantiation, including arguments

Act as registry

Allows attaching single broker to many

objects

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/* class loader */namespaceMy\Component;useZend\Loader\PluginClassLoader,

Zend\Loader\PluginBroker;

classComponentLoaderextendsPluginClassLoader{ protected $plugins =array( 'foo' =>'My\Component\Foo', 'foo_bar'=>'My\Component\FooBar',

);}

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/* class broker */namespaceMy\Component;useZend\Loader\PluginClassLoader,

Zend\Loader\PluginBroker;

classComponentBrokerextendsPluginBroker{ protected $defaultClassLoader =

'My\Component\PluginClassLoader';

protected functionvalidatePlugin($plugin) { if(!$plugin instanceofAdapter) { throw newException\RuntimeException(); } returntrue; }}

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/* factory */namespaceMy\Component;

classFactory{ /* Not shown: setBroker() and broker() methods */

public functionget($adapter,array $options) { return $this->broker()

->load($adapter, $options); }}

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Ease the learning curveEase the learning curve

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Common Documentation Complaints

Options are (often) not documented.Available functionality (typically, methods) is

not presented.

Inconsistent structure between

documentation of different components.

Examples do not show common use cases,

only using the component individually.

No examples showing complete application

development.

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Common Learning Problems

Magic (__ methods) is hard to learn(just ask Harry Potter).

Uncertainty where and when to extend or

implement extension points and how toget ZF to use them.

Some patterns are non-obvious in usage

(Zend_Form decorators).

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Proposed Solutions

Coding:Refactor where usage patterns differ

from design

Reduce number of magic calls

Refactor for consistency

Refactor unclear APIs

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Proposed Solutions

Documentation Standards:Introduction

Quick Start

Options

Methods

Examples

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The RoadmapThe Roadmap

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Completed Milestones

Migration to Git for ZF2 developmentStripping of require_once calls

Migration to PHP 5.3 namespaces

Including SPL additions, Session rewrite, and

addition of SignalSlot

Autoloading and plugin loading/brokering

Including View rewrite

Exceptions

In fact, we've just released a new

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Completed Milestones

Zend Framework 2.0.0dev2:http://bit.ly/zf2dev2

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Remaining Milestones

MVC Refactoring/RewriteInternationalization and Localization

Testing

Documentation

Packaging

Migration tools

H

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HowHow

YOUYOU

cancan

helphelp

C t ib t t ZF2!

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Contribute to ZF2!

ZF2 wiki:http://bit.ly/zf2wiki

zf-contributors mailing list:

zf-contributors-subscribe@lists.zend.comIRC:

#zftalk.dev on Freenode

ZF2 Git

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ZF2 Git

Git guide:http://bit.ly/zf2gitguide

GitHub:

http://github.com/zendframework/zf2

Official repo:

git://git.zendframework.com/zf.git

http://git.zendframework.com/

You still need to sign a CLA!

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Thank you!Thank you!http://framework.zend.comhttp://framework.zend.com

Feedback: http:://joind.in/2287Feedback: http:://joind.in/2287

Twitter:Twitter: weierophinney,weierophinney,

ralphschindlerralphschindler