ServiceSubscriberInterface.php 0000644 00000005276 15152041371 0012533 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
use Symfony\Contracts\Service\Attribute\SubscribedService;
/**
* A ServiceSubscriber exposes its dependencies via the static {@link getSubscribedServices} method.
*
* The getSubscribedServices method returns an array of service types required by such instances,
* optionally keyed by the service names used internally. Service types that start with an interrogation
* mark "?" are optional, while the other ones are mandatory service dependencies.
*
* The injected service locators SHOULD NOT allow access to any other services not specified by the method.
*
* It is expected that ServiceSubscriber instances consume PSR-11-based service locators internally.
* This interface does not dictate any injection method for these service locators, although constructor
* injection is recommended.
*
* @author Nicolas Grekas <p@tchwork.com>
*/
interface ServiceSubscriberInterface
{
/**
* Returns an array of service types (or {@see SubscribedService} objects) required
* by such instances, optionally keyed by the service names used internally.
*
* For mandatory dependencies:
*
* * ['logger' => 'Psr\Log\LoggerInterface'] means the objects use the "logger" name
* internally to fetch a service which must implement Psr\Log\LoggerInterface.
* * ['loggers' => 'Psr\Log\LoggerInterface[]'] means the objects use the "loggers" name
* internally to fetch an iterable of Psr\Log\LoggerInterface instances.
* * ['Psr\Log\LoggerInterface'] is a shortcut for
* * ['Psr\Log\LoggerInterface' => 'Psr\Log\LoggerInterface']
*
* otherwise:
*
* * ['logger' => '?Psr\Log\LoggerInterface'] denotes an optional dependency
* * ['loggers' => '?Psr\Log\LoggerInterface[]'] denotes an optional iterable dependency
* * ['?Psr\Log\LoggerInterface'] is a shortcut for
* * ['Psr\Log\LoggerInterface' => '?Psr\Log\LoggerInterface']
*
* additionally, an array of {@see SubscribedService}'s can be returned:
*
* * [new SubscribedService('logger', Psr\Log\LoggerInterface::class)]
* * [new SubscribedService(type: Psr\Log\LoggerInterface::class, nullable: true)]
* * [new SubscribedService('http_client', HttpClientInterface::class, attributes: new Target('githubApi'))]
*
* @return string[]|SubscribedService[] The required service types, optionally keyed by service names
*/
public static function getSubscribedServices(): array;
}
LICENSE 0000644 00000002054 15152041371 0005551 0 ustar 00 Copyright (c) 2018-present Fabien Potencier
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished
to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
ServiceLocatorTrait.php 0000644 00000007101 15152041371 0011203 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\NotFoundExceptionInterface;
// Help opcache.preload discover always-needed symbols
class_exists(ContainerExceptionInterface::class);
class_exists(NotFoundExceptionInterface::class);
/**
* A trait to help implement ServiceProviderInterface.
*
* @author Robin Chalas <robin.chalas@gmail.com>
* @author Nicolas Grekas <p@tchwork.com>
*/
trait ServiceLocatorTrait
{
private array $factories;
private array $loading = [];
private array $providedTypes;
/**
* @param array<string, callable> $factories
*/
public function __construct(array $factories)
{
$this->factories = $factories;
}
public function has(string $id): bool
{
return isset($this->factories[$id]);
}
public function get(string $id): mixed
{
if (!isset($this->factories[$id])) {
throw $this->createNotFoundException($id);
}
if (isset($this->loading[$id])) {
$ids = array_values($this->loading);
$ids = \array_slice($this->loading, array_search($id, $ids));
$ids[] = $id;
throw $this->createCircularReferenceException($id, $ids);
}
$this->loading[$id] = $id;
try {
return $this->factories[$id]($this);
} finally {
unset($this->loading[$id]);
}
}
public function getProvidedServices(): array
{
if (!isset($this->providedTypes)) {
$this->providedTypes = [];
foreach ($this->factories as $name => $factory) {
if (!\is_callable($factory)) {
$this->providedTypes[$name] = '?';
} else {
$type = (new \ReflectionFunction($factory))->getReturnType();
$this->providedTypes[$name] = $type ? ($type->allowsNull() ? '?' : '').($type instanceof \ReflectionNamedType ? $type->getName() : $type) : '?';
}
}
}
return $this->providedTypes;
}
private function createNotFoundException(string $id): NotFoundExceptionInterface
{
if (!$alternatives = array_keys($this->factories)) {
$message = 'is empty...';
} else {
$last = array_pop($alternatives);
if ($alternatives) {
$message = sprintf('only knows about the "%s" and "%s" services.', implode('", "', $alternatives), $last);
} else {
$message = sprintf('only knows about the "%s" service.', $last);
}
}
if ($this->loading) {
$message = sprintf('The service "%s" has a dependency on a non-existent service "%s". This locator %s', end($this->loading), $id, $message);
} else {
$message = sprintf('Service "%s" not found: the current service locator %s', $id, $message);
}
return new class($message) extends \InvalidArgumentException implements NotFoundExceptionInterface {
};
}
private function createCircularReferenceException(string $id, array $path): ContainerExceptionInterface
{
return new class(sprintf('Circular reference detected for service "%s", path: "%s".', $id, implode(' -> ', $path))) extends \RuntimeException implements ContainerExceptionInterface {
};
}
}
CHANGELOG.md 0000644 00000000235 15152041371 0006354 0 ustar 00 CHANGELOG
=========
The changelog is maintained for all Symfony contracts at the following URL:
https://github.com/symfony/contracts/blob/main/CHANGELOG.md
Test/ServiceLocatorTestCase.php 0000644 00000005551 15152041371 0012561 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service\Test;
use PHPUnit\Framework\TestCase;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\ContainerInterface;
use Psr\Container\NotFoundExceptionInterface;
use Symfony\Contracts\Service\ServiceLocatorTrait;
abstract class ServiceLocatorTestCase extends TestCase
{
protected function getServiceLocator(array $factories): ContainerInterface
{
return new class($factories) implements ContainerInterface {
use ServiceLocatorTrait;
};
}
public function testHas()
{
$locator = $this->getServiceLocator([
'foo' => fn () => 'bar',
'bar' => fn () => 'baz',
fn () => 'dummy',
]);
$this->assertTrue($locator->has('foo'));
$this->assertTrue($locator->has('bar'));
$this->assertFalse($locator->has('dummy'));
}
public function testGet()
{
$locator = $this->getServiceLocator([
'foo' => fn () => 'bar',
'bar' => fn () => 'baz',
]);
$this->assertSame('bar', $locator->get('foo'));
$this->assertSame('baz', $locator->get('bar'));
}
public function testGetDoesNotMemoize()
{
$i = 0;
$locator = $this->getServiceLocator([
'foo' => function () use (&$i) {
++$i;
return 'bar';
},
]);
$this->assertSame('bar', $locator->get('foo'));
$this->assertSame('bar', $locator->get('foo'));
$this->assertSame(2, $i);
}
public function testThrowsOnUndefinedInternalService()
{
$locator = $this->getServiceLocator([
'foo' => function () use (&$locator) { return $locator->get('bar'); },
]);
if (!$this->getExpectedException()) {
$this->expectException(NotFoundExceptionInterface::class);
$this->expectExceptionMessage('The service "foo" has a dependency on a non-existent service "bar". This locator only knows about the "foo" service.');
}
$locator->get('foo');
}
public function testThrowsOnCircularReference()
{
$locator = $this->getServiceLocator([
'foo' => function () use (&$locator) { return $locator->get('bar'); },
'bar' => function () use (&$locator) { return $locator->get('baz'); },
'baz' => function () use (&$locator) { return $locator->get('bar'); },
]);
$this->expectException(ContainerExceptionInterface::class);
$this->expectExceptionMessage('Circular reference detected for service "bar", path: "bar -> baz -> bar".');
$locator->get('foo');
}
}
Test/ServiceLocatorTest.php 0000644 00000000716 15152041371 0011763 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service\Test;
class_alias(ServiceLocatorTestCase::class, ServiceLocatorTest::class);
if (false) {
/**
* @deprecated since PHPUnit 9.6
*/
class ServiceLocatorTest
{
}
}
Attribute/SubscribedService.php 0000644 00000002721 15152041371 0012627 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service\Attribute;
use Symfony\Contracts\Service\ServiceMethodsSubscriberTrait;
use Symfony\Contracts\Service\ServiceSubscriberInterface;
/**
* For use as the return value for {@see ServiceSubscriberInterface}.
*
* @example new SubscribedService('http_client', HttpClientInterface::class, false, new Target('githubApi'))
*
* Use with {@see ServiceMethodsSubscriberTrait} to mark a method's return type
* as a subscribed service.
*
* @author Kevin Bond <kevinbond@gmail.com>
*/
#[\Attribute(\Attribute::TARGET_METHOD)]
final class SubscribedService
{
/** @var object[] */
public array $attributes;
/**
* @param string|null $key The key to use for the service
* @param class-string|null $type The service class
* @param bool $nullable Whether the service is optional
* @param object|object[] $attributes One or more dependency injection attributes to use
*/
public function __construct(
public ?string $key = null,
public ?string $type = null,
public bool $nullable = false,
array|object $attributes = [],
) {
$this->attributes = \is_array($attributes) ? $attributes : [$attributes];
}
}
Attribute/Required.php 0000644 00000001221 15152041371 0010773 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service\Attribute;
/**
* A required dependency.
*
* This attribute indicates that a property holds a required dependency. The annotated property or method should be
* considered during the instantiation process of the containing class.
*
* @author Alexander M. Turek <me@derrabus.de>
*/
#[\Attribute(\Attribute::TARGET_METHOD | \Attribute::TARGET_PROPERTY)]
final class Required
{
}
ResetInterface.php 0000644 00000002013 15152041371 0010153 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
/**
* Provides a way to reset an object to its initial state.
*
* When calling the "reset()" method on an object, it should be put back to its
* initial state. This usually means clearing any internal buffers and forwarding
* the call to internal dependencies. All properties of the object should be put
* back to the same state it had when it was first ready to use.
*
* This method could be called, for example, to recycle objects that are used as
* services, so that they can be used to handle several requests in the same
* process loop (note that we advise making your services stateless instead of
* implementing this interface when possible.)
*/
interface ResetInterface
{
/**
* @return void
*/
public function reset();
}
ServiceSubscriberTrait.php 0000644 00000006232 15152041371 0011707 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
use Psr\Container\ContainerInterface;
use Symfony\Contracts\Service\Attribute\Required;
use Symfony\Contracts\Service\Attribute\SubscribedService;
trigger_deprecation('symfony/contracts', 'v3.5', '"%s" is deprecated, use "ServiceMethodsSubscriberTrait" instead.', ServiceSubscriberTrait::class);
/**
* Implementation of ServiceSubscriberInterface that determines subscribed services
* from methods that have the #[SubscribedService] attribute.
*
* Service ids are available as "ClassName::methodName" so that the implementation
* of subscriber methods can be just `return $this->container->get(__METHOD__);`.
*
* @property ContainerInterface $container
*
* @author Kevin Bond <kevinbond@gmail.com>
*
* @deprecated since symfony/contracts v3.5, use ServiceMethodsSubscriberTrait instead
*/
trait ServiceSubscriberTrait
{
public static function getSubscribedServices(): array
{
$services = method_exists(get_parent_class(self::class) ?: '', __FUNCTION__) ? parent::getSubscribedServices() : [];
foreach ((new \ReflectionClass(self::class))->getMethods() as $method) {
if (self::class !== $method->getDeclaringClass()->name) {
continue;
}
if (!$attribute = $method->getAttributes(SubscribedService::class)[0] ?? null) {
continue;
}
if ($method->isStatic() || $method->isAbstract() || $method->isGenerator() || $method->isInternal() || $method->getNumberOfRequiredParameters()) {
throw new \LogicException(sprintf('Cannot use "%s" on method "%s::%s()" (can only be used on non-static, non-abstract methods with no parameters).', SubscribedService::class, self::class, $method->name));
}
if (!$returnType = $method->getReturnType()) {
throw new \LogicException(sprintf('Cannot use "%s" on methods without a return type in "%s::%s()".', SubscribedService::class, $method->name, self::class));
}
/* @var SubscribedService $attribute */
$attribute = $attribute->newInstance();
$attribute->key ??= self::class.'::'.$method->name;
$attribute->type ??= $returnType instanceof \ReflectionNamedType ? $returnType->getName() : (string) $returnType;
$attribute->nullable = $returnType->allowsNull();
if ($attribute->attributes) {
$services[] = $attribute;
} else {
$services[$attribute->key] = ($attribute->nullable ? '?' : '').$attribute->type;
}
}
return $services;
}
#[Required]
public function setContainer(ContainerInterface $container): ?ContainerInterface
{
$ret = null;
if (method_exists(get_parent_class(self::class) ?: '', __FUNCTION__)) {
$ret = parent::setContainer($container);
}
$this->container = $container;
return $ret;
}
}
ServiceProviderInterface.php 0000644 00000002546 15152041371 0012217 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
use Psr\Container\ContainerInterface;
/**
* A ServiceProviderInterface exposes the identifiers and the types of services provided by a container.
*
* @author Nicolas Grekas <p@tchwork.com>
* @author Mateusz Sip <mateusz.sip@gmail.com>
*
* @template-covariant T of mixed
*/
interface ServiceProviderInterface extends ContainerInterface
{
/**
* @return T
*/
public function get(string $id): mixed;
public function has(string $id): bool;
/**
* Returns an associative array of service types keyed by the identifiers provided by the current container.
*
* Examples:
*
* * ['logger' => 'Psr\Log\LoggerInterface'] means the object provides a service named "logger" that implements Psr\Log\LoggerInterface
* * ['foo' => '?'] means the container provides service name "foo" of unspecified type
* * ['bar' => '?Bar\Baz'] means the container provides a service "bar" of type Bar\Baz|null
*
* @return array<string, string> The provided service types, keyed by service names
*/
public function getProvidedServices(): array;
}
ServiceCollectionInterface.php 0000644 00000001162 15152041371 0012511 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
/**
* A ServiceProviderInterface that is also countable and iterable.
*
* @author Kevin Bond <kevinbond@gmail.com>
*
* @template-covariant T of mixed
*
* @extends ServiceProviderInterface<T>
* @extends \IteratorAggregate<string, T>
*/
interface ServiceCollectionInterface extends ServiceProviderInterface, \Countable, \IteratorAggregate
{
}
composer.json 0000644 00000002166 15152041371 0007272 0 ustar 00 {
"name": "symfony/service-contracts",
"type": "library",
"description": "Generic abstractions related to writing services",
"keywords": ["abstractions", "contracts", "decoupling", "interfaces", "interoperability", "standards"],
"homepage": "https://symfony.com",
"license": "MIT",
"authors": [
{
"name": "Nicolas Grekas",
"email": "p@tchwork.com"
},
{
"name": "Symfony Community",
"homepage": "https://symfony.com/contributors"
}
],
"require": {
"php": ">=8.1",
"psr/container": "^1.1|^2.0",
"symfony/deprecation-contracts": "^2.5|^3"
},
"conflict": {
"ext-psr": "<1.1|>=2"
},
"autoload": {
"psr-4": { "Symfony\\Contracts\\Service\\": "" },
"exclude-from-classmap": [
"/Test/"
]
},
"minimum-stability": "dev",
"extra": {
"branch-alias": {
"dev-main": "3.5-dev"
},
"thanks": {
"name": "symfony/contracts",
"url": "https://github.com/symfony/contracts"
}
}
}
ServiceMethodsSubscriberTrait.php 0000644 00000005661 15152041371 0013240 0 ustar 00 <?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Contracts\Service;
use Psr\Container\ContainerInterface;
use Symfony\Contracts\Service\Attribute\Required;
use Symfony\Contracts\Service\Attribute\SubscribedService;
/**
* Implementation of ServiceSubscriberInterface that determines subscribed services
* from methods that have the #[SubscribedService] attribute.
*
* Service ids are available as "ClassName::methodName" so that the implementation
* of subscriber methods can be just `return $this->container->get(__METHOD__);`.
*
* @author Kevin Bond <kevinbond@gmail.com>
*/
trait ServiceMethodsSubscriberTrait
{
protected ContainerInterface $container;
public static function getSubscribedServices(): array
{
$services = method_exists(get_parent_class(self::class) ?: '', __FUNCTION__) ? parent::getSubscribedServices() : [];
foreach ((new \ReflectionClass(self::class))->getMethods() as $method) {
if (self::class !== $method->getDeclaringClass()->name) {
continue;
}
if (!$attribute = $method->getAttributes(SubscribedService::class)[0] ?? null) {
continue;
}
if ($method->isStatic() || $method->isAbstract() || $method->isGenerator() || $method->isInternal() || $method->getNumberOfRequiredParameters()) {
throw new \LogicException(sprintf('Cannot use "%s" on method "%s::%s()" (can only be used on non-static, non-abstract methods with no parameters).', SubscribedService::class, self::class, $method->name));
}
if (!$returnType = $method->getReturnType()) {
throw new \LogicException(sprintf('Cannot use "%s" on methods without a return type in "%s::%s()".', SubscribedService::class, $method->name, self::class));
}
/* @var SubscribedService $attribute */
$attribute = $attribute->newInstance();
$attribute->key ??= self::class.'::'.$method->name;
$attribute->type ??= $returnType instanceof \ReflectionNamedType ? $returnType->getName() : (string) $returnType;
$attribute->nullable = $returnType->allowsNull();
if ($attribute->attributes) {
$services[] = $attribute;
} else {
$services[$attribute->key] = ($attribute->nullable ? '?' : '').$attribute->type;
}
}
return $services;
}
#[Required]
public function setContainer(ContainerInterface $container): ?ContainerInterface
{
$ret = null;
if (method_exists(get_parent_class(self::class) ?: '', __FUNCTION__)) {
$ret = parent::setContainer($container);
}
$this->container = $container;
return $ret;
}
}
README.md 0000644 00000000512 15152041371 0006020 0 ustar 00 Symfony Service Contracts
=========================
A set of abstractions extracted out of the Symfony components.
Can be used to build on semantics that the Symfony components proved useful and
that already have battle tested implementations.
See https://github.com/symfony/contracts/blob/main/README.md for more information.