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eZ Publish NextgenKnock knock. Who’s there ? The Future !

samedi 15 octobre 11

Current architectureWhat’s wrong with it ? Why ?


Current architecture


• RDBMS dependent, and strongly bound to the database structure• PHP 4 ages legacy :

o Weak OOP concepts (no interfaces, no abstract, no excepGons, no magic, no dependency injecGon, everything is public)

o Global variables usage (for singletons on in-‐memory cache)o (And also some dirty workarounds)

• Low level APIo Hard to catcho SomeGmes dangerous to manipulate directly (for data integrity)o No real API doc, hence no developer doc

• Hardly testable

Current architecture


• Evolu'ons are very 'me-‐consuming• Maintaining backward compa'bility is very complex• No possible support for NoSQL• Impossible to perform RDBMS specific op'miza'ons

(na've func'ons and procedures, like in Oracle, or even latest MySQL)

• Bad API usage (and "Black Magic")

Consequences


New architecture«This is a revoluGon» © S.J.


Layers...


• Kicked off with Domain Driven Design methodologies• Storage system agnos'c• Extensible• Secure• Easy to use• Modern (PHP 5.3, namespaces, design paUerns...)

New architecture overview


The refined domain defini'on comes up with new terms:

Content Object Content

Node Loca/on

Content Object A1ribute Field

Content Class Content Type

Content Class A1ribute Field Defini/on

Datatype Field Type

Easier to understand for newcomers and non-‐technical people (Domain design approach)

Do you speak eZ Publish ?


• Public API is the ONLY API any developer should use directly

• Any developer = eZ Engineers included (kernel modules)

• Should be sexy and very easy to use

• High level, so that the developer doesn't care about the backend

• It interacts seamlessly with the business layer in the backend

Public API


• This is the layer where most of the logic is implemented

• It is completely storage agnos/c, as it uses the content persistence API.

• It uses the Content Repository to manipulate the CMS data.

• It doesn't delegate logic to the content persistence API.

Business layer


• Starts as a set of interfaces.

• These interfaces are implemented by every content repositories (aka Storage Engines).

• Ensures full abstrac/on between the business layer and the storage mechanisms.

• Contains as liUle logic as possible. It cares about data, only data. Logic is in the business layer.

Persistence layer


• Storage engines implement the Content Persistence Interfaces

• Each storage engine corresponds to a type of data storageo Classic RDBMS (MySQL, PostgreSQL...)o Document oriented storage (NoSQL)o ...

• Internals are completely hidden, and can use anything: ORM, ezcDatabase, REST, SOAP...

Storage engines


New, fancy terms

• Repository: Centralized, virtual storage system. Implemented by storage. Also used for binary files.

• Domain Object (aka DO): High level PHP object exposed in public API: Content, Loca'on, Field, etc.

• Service: Interac'on components from the Business Layer: Content, Loca'on, etc.

Do you speak eZ Publish ?


• eZ Publish 4 database Persistence Layer implementa'on

• Implemented from scratch. Shiny !

• Uses the Zeta Components (ezcDatabase + ezcQuery)

• Tested to be two-‐ways compa/ble with eZ Publish 4:➡ content created from ezp4 is available in the API➡ content created from the API is available in ezp4

• No migra/on required !

Legacy Storage Engine


Code !That’s why we’re here, right ?


<?phpuse ezp\Base\ServiceContainer, ezp\Base\Configuration, ezp\Content\FieldType\Url;

// Get the repository, and configure the user to use$sc = new ServiceContainer( Configuration::getInstance( 'service' )->getAll() );$repository = $sc->getRepository();$contentService = $repository->getContentService();$repository->setUser( $repository->getUserService()->load( 14 ) );

// Build a new folder// $folder will be a DO, ezp\Content$folder = $contentService->init( 'folder', 'eng-GB' );$folder->fields['name'] = 'News';$folder->fields['description'] = '<p>My <strong>ubber cool</strong> description !</p>';$folder->fields['link'] = new Url\Value( 'http://ez.no', 'eZ Systems' );$folder->addParent( $repository->getLocationService()->load( 2 ) );$folder = $contentService->create( $folder );$contentService->publish( $folder->versions[1] );

Create content


http://ez.no

http://ez.no

<?phpuse ezp\Base\ServiceContainer, ezp\Base\Configuration;

$sc = new ServiceContainer( Configuration::getInstance( 'service' )->getAll() );$repository = $sc->getRepository();$contentService = $repository->getContentService();try{ $content = $contentService->load( 60 );}catch ( ezp\Base\Exception\NotFound $e ){ echo "Content could not be found in the repository !\n"; exit;}

// Loop against fields.// $identifier is the attribute identifier// $value is the corresponding value objectecho "Content '{$content}' has following fields:\n";foreach ( $content->fields as $identifier => $value ){ echo "Field '{$identifier}': {$value}\n"; // Using $value __toString()}

Load content


<?phpuse ezp\Base\ServiceContainer, ezp\Base\Configuration, ezp\Content, ezp\Content\Query;

$sc = new ServiceContainer( Configuration::getInstance( 'service' )->getAll() );$qb = new ezp\Content\Query\Builder;$contentService = $sc->getRepository()->getContentService();

// a full criteria$qb->addCriteria( $qb->fullText->like( 'eZ Publish' ), $qb->urlAlias->like( '/cms/amazing/*' ), $qb->contentType->eq( 'blog_post' ), $qb->field->eq( 'author', '[email protected]' ))->addSortClause( $qb->sort->field( 'blog_post', 'title', Query::SORT_ASC ), $qb->sort->dateCreated( Query::SORT_DESC ))->setOffset( 0 )->setLimit( 10 );$contentList = $contentService->find( $qb->getQuery() );

Fetch content


mailto:[email protected]

mailto:[email protected]

Field types

• Now spliUed in (at least) 2 objects:• Type• Value

• Dedicated PHP namespace

• Interfaces to determine which features the field type implement (Searchable, Collectable...)

• Converters for Legacy storage engine


• Full language/transla'on support

• Finish migra'ng datatypes

• HTTP layer + modules

• REST API implementa'on based on the new API

• Op'mized storage engines

Roadmap


•Get it : http://github.com/ezsystems/ezp-next

•Blame it : http://issues.ez.no/ezpublish (ezpnext component)

•Discuss it : http://share.ez.no/forums/new-php-api

•Own it : Make a GitHub pull request !

Soon to come: wiki based cookbook, blog posts.

Now it’s your turn !


http://github.com/ezsystems/ezp-next

http://github.com/ezsystems/ezp-next

http://issues.ez.no/ezpublish

http://issues.ez.no/ezpublish

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