gpslab/specification-query

The simple infrastructure component for use a Doctrine specification as query in CQRS architecture

v1.0.0 2017-06-23 11:38 UTC

This package is auto-updated.

Last update: 2024-10-29 03:58:51 UTC


README

Latest Stable Version Total Downloads Build Status Coverage Status Scrutinizer Code Quality SensioLabs Insight StyleCI License

Doctrine Specification as query in CQRS architecture

The simple infrastructure component for use a Doctrine Specification as query in CQRS architecture.

Installation

Pretty simple with Composer, run:

composer require gpslab/specification-query

Usage

You can use Specifications as a simple query.

use GpsLab\Component\Query\Bus\HandlerLocatedQueryBus;
use GpsLab\Component\Query\Handler\Locator\DirectBindingQueryHandlerLocator;
use GpsLab\Component\Query\Specification\SpecificationQueryHandler;
use GpsLab\Component\Query\Specification\ObviousSpecificationQuery;

// register query handler in handler locator
$locator = new DirectBindingQueryHandlerLocator();
$locator->registerHandler(ObviousSpecificationQuery::class, [new SpecificationQueryHandler($em), 'handleSpecification']);

// create bus with query handler locator
$bus = new HandlerLocatedQueryBus($locator);


// specification for get contact with id = 123
$spec = Spec::eq('id', 123);

// cache the result by 1 hour
$modifier = Spec::cache(3600);

// make specification query
$query = new ObviousSpecificationQuery('AcmeDemo:Contact', $spec, $modifier);


// get contact
$contact = $query_bus->handle($query);

Custom query

You can create custom query for this case.

class ContactWithIdentityQuery implements SpecificationQuery
{
    /**
     * @var int
     */
    private $id;

    /**
     * @param int $id
     */
    public function __construct($id)
    {
        $this->id = $id;
    }

    /**
     * @return string
     */
    public function entity()
    {
        return 'AcmeDemo:Contact';
    }

    /**
     * @return Specification
     */
    public function spec()
    {
        return Spec::eq('id', $this->id);
    }

    /**
     * @return ResultModifier|null
     */
    public function modifier()
    {
        return Spec::cache(3600);
    }
}

And use it

use GpsLab\Component\Query\Bus\HandlerLocatedQueryBus;
use GpsLab\Component\Query\Handler\Locator\DirectBindingQueryHandlerLocator;
use GpsLab\Component\Query\Specification\SpecificationQueryHandler;
use GpsLab\Component\Query\Specification\ObviousSpecificationQuery;

// register query handler in handler locator
$locator = new DirectBindingQueryHandlerLocator();
$locator->registerHandler(ContactWithIdentityQuery::class, [new SpecificationQueryHandler($em), 'handleSpecification']);

// create bus with query handler locator
$bus = new HandlerLocatedQueryBus($locator);


// make specification query
$query = new ContactWithIdentityQuery(123);


// get contact
$contact = $query_bus->handle($query);

License

This bundle is under the MIT license. See the complete license in the file: LICENSE