symfony · nicolas-grekas · Jan 26, 2019 · Nov 15, 2018
diff --git a/UPGRADE-4.3.md b/UPGRADE-4.3.md
@@ -8,6 +8,13 @@ BrowserKit
  * Deprecated `Response::buildHeader()`
  * Deprecated `Response::getStatus()`, use `Response::getStatusCode()` instead
 
+Cache
+-----
+
+ * The `psr/simple-cache` dependency has been removed - run `composer require psr/simple-cache` if you need it.
+ * Deprecated all PSR-16 adapters, use `Psr16Cache` or `Symfony\Contracts\Cache\CacheInterface` implementations instead.
+ * Deprecated `SimpleCacheAdapter`, use `Psr16Adapter instead.
+
 Config
 ------
 
@@ -18,6 +25,7 @@ FrameworkBundle
 
  * Not passing the project directory to the constructor of the `AssetsInstallCommand` is deprecated. This argument will
    be mandatory in 5.0.
+ * Deprecated the "Psr\SimpleCache\CacheInterface" / "cache.app.simple" service, use "Symfony\Contracts\Cache\CacheInterface" / "cache.app" instead.
 
 HttpFoundation
 --------------

diff --git a/UPGRADE-5.0.md b/UPGRADE-5.0.md
@@ -13,6 +13,8 @@ Cache
 -----
 
  * Removed `CacheItem::getPreviousTags()`, use `CacheItem::getMetadata()` instead.
+ * Removed all PSR-16 adapters, use `Psr16Cache` or `Symfony\Contracts\Cache\CacheInterface` implementations instead.
+ * Removed `SimpleCacheAdapter`, use `Psr16Adapter instead.
 
 Config
 ------
@@ -163,6 +165,7 @@ FrameworkBundle
  * The `Templating\Helper\TranslatorHelper::transChoice()` method has been removed, use the `trans()` one instead with a `%count%` parameter.
  * Removed support for legacy translations directories `src/Resources/translations/` and `src/Resources/<BundleName>/translations/`, use `translations/` instead.
  * Support for the legacy directory structure in `translation:update` and `debug:translation` commands has been removed.
+ * Removed the "Psr\SimpleCache\CacheInterface" / "cache.app.simple" service, use "Symfony\Contracts\Cache\CacheInterface" / "cache.app" instead.
 
 HttpFoundation
 --------------

diff --git a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
@@ -8,6 +8,7 @@ CHANGELOG
    be mandatory in 5.0.
  * Added `ControllerTrait::isFormValid()`
  * Added an `help_html` form option to display the `help` text as HTML
+ * Deprecated the "Psr\SimpleCache\CacheInterface" / "cache.app.simple" service, use "Symfony\Contracts\Cache\CacheInterface" / "cache.app" instead
 
  * [BC Break] When using Messenger, the default transport changed from
    using Symfony's serializer service to use `PhpSerializer`, which uses

diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/cache.xml
@@ -11,7 +11,8 @@
             <tag name="cache.pool" clearer="cache.app_clearer" reset="reset" />
         </service>
 
-        <service id="cache.app.simple" class="Symfony\Component\Cache\Simple\Psr6Cache">
+        <service id="cache.app.simple" class="Symfony\Component\Cache\Psr16Cache">
+            <deprecated>The "Psr\SimpleCache\CacheInterface" / "%service_id%" service is deprecated since Symfony 4.3. Use "Symfony\Contracts\Cache\CacheInterface" / "cache.app" instead.</deprecated>
             <argument type="service" id="cache.app" />
         </service>
 

diff --git a/src/Symfony/Bundle/FrameworkBundle/composer.json b/src/Symfony/Bundle/FrameworkBundle/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^7.1.3",
         "ext-xml": "*",
-        "symfony/cache": "~4.2",
+        "symfony/cache": "~4.3",
         "symfony/config": "~4.2",
         "symfony/contracts": "^1.0.2",
         "symfony/dependency-injection": "^4.2",

diff --git a/src/Symfony/Component/Cache/Adapter/Psr16Adapter.php b/src/Symfony/Component/Cache/Adapter/Psr16Adapter.php
@@ -0,0 +1,81 @@
+<?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\Component\Cache\Adapter;
+
+use Psr\SimpleCache\CacheInterface;
+use Symfony\Component\Cache\PruneableInterface;
+use Symfony\Component\Cache\ResettableInterface;
+use Symfony\Component\Cache\Traits\ProxyTrait;
+
+/**
+ * Turns a PSR-16 cache into a PSR-6 one.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class Psr16Adapter extends AbstractAdapter implements PruneableInterface, ResettableInterface
+{
+    use ProxyTrait;
+
+    private $miss;
+
+    public function __construct(CacheInterface $pool, string $namespace = '', int $defaultLifetime = 0)
+    {
+        parent::__construct($namespace, $defaultLifetime);
+
+        $this->pool = $pool;
+        $this->miss = new \stdClass();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFetch(array $ids)
+    {
+        foreach ($this->pool->getMultiple($ids, $this->miss) as $key => $value) {
+            if ($this->miss !== $value) {
+                yield $key => $value;
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doHave($id)
+    {
+        return $this->pool->has($id);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doClear($namespace)
+    {
+        return $this->pool->clear();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doDelete(array $ids)
+    {
+        return $this->pool->deleteMultiple($ids);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doSave(array $values, $lifetime)
+    {
+        return $this->pool->setMultiple($values, 0 === $lifetime ? null : $lifetime);
+    }
+}
diff --git a/src/Symfony/Component/Cache/Adapter/SimpleCacheAdapter.php b/src/Symfony/Component/Cache/Adapter/SimpleCacheAdapter.php
@@ -11,69 +11,11 @@
 
 namespace Symfony\Component\Cache\Adapter;
 
-use Psr\SimpleCache\CacheInterface;
-use Symfony\Component\Cache\PruneableInterface;
-use Symfony\Component\Cache\ResettableInterface;
-use Symfony\Component\Cache\Traits\ProxyTrait;
+@trigger_error(sprintf('The "%s" class is @deprecated since Symfony 4.3, use "Psr16Adapter" instead.', SimpleCacheAdapter::class), E_USER_DEPRECATED);
 
 /**
- * @author Nicolas Grekas <p@tchwork.com>
+ * @deprecated since Symfony 4.3, use Psr16Adapter instead.
  */
-class SimpleCacheAdapter extends AbstractAdapter implements PruneableInterface, ResettableInterface
+class SimpleCacheAdapter extends Psr16Adapter
 {
-    use ProxyTrait;
-
-    private $miss;
-
-    public function __construct(CacheInterface $pool, string $namespace = '', int $defaultLifetime = 0)
-    {
-        parent::__construct($namespace, $defaultLifetime);
-
-        $this->pool = $pool;
-        $this->miss = new \stdClass();
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function doFetch(array $ids)
-    {
-        foreach ($this->pool->getMultiple($ids, $this->miss) as $key => $value) {
-            if ($this->miss !== $value) {
-                yield $key => $value;
-            }
-        }
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function doHave($id)
-    {
-        return $this->pool->has($id);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function doClear($namespace)
-    {
-        return $this->pool->clear();
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function doDelete(array $ids)
-    {
-        return $this->pool->deleteMultiple($ids);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function doSave(array $values, $lifetime)
-    {
-        return $this->pool->setMultiple($values, 0 === $lifetime ? null : $lifetime);
-    }
 }
diff --git a/src/Symfony/Component/Cache/CHANGELOG.md b/src/Symfony/Component/Cache/CHANGELOG.md
@@ -1,6 +1,13 @@
 CHANGELOG
 =========
 
+4.3.0
+-----
+
+ * removed `psr/simple-cache` dependency, run `composer require psr/simple-cache` if you need it
+ * deprecated all PSR-16 adapters, use `Psr16Cache` or `Symfony\Contracts\Cache\CacheInterface` implementations instead
+ * deprecated `SimpleCacheAdapter`, use `Psr16Adapter` instead
+
 4.2.0
 -----
 

diff --git a/src/Symfony/Component/Cache/Exception/CacheException.php b/src/Symfony/Component/Cache/Exception/CacheException.php
@@ -14,6 +14,12 @@
 use Psr\Cache\CacheException as Psr6CacheInterface;
 use Psr\SimpleCache\CacheException as SimpleCacheInterface;
 
-class CacheException extends \Exception implements Psr6CacheInterface, SimpleCacheInterface
-{
+if (interface_exists(SimpleCacheInterface::class)) {
+    class CacheException extends \Exception implements Psr6CacheInterface, SimpleCacheInterface
+    {
+    }
+} else {
+    class CacheException extends \Exception implements Psr6CacheInterface
+    {
+    }
 }
diff --git a/src/Symfony/Component/Cache/Exception/InvalidArgumentException.php b/src/Symfony/Component/Cache/Exception/InvalidArgumentException.php
@@ -14,6 +14,12 @@
 use Psr\Cache\InvalidArgumentException as Psr6CacheInterface;
 use Psr\SimpleCache\InvalidArgumentException as SimpleCacheInterface;
 
-class InvalidArgumentException extends \InvalidArgumentException implements Psr6CacheInterface, SimpleCacheInterface
-{
+if (interface_exists(SimpleCacheInterface::class)) {
+    class InvalidArgumentException extends \InvalidArgumentException implements Psr6CacheInterface, SimpleCacheInterface
+    {
+    }
+} else {
+    class InvalidArgumentException extends \InvalidArgumentException implements Psr6CacheInterface
+    {
+    }
 }
diff --git a/src/Symfony/Component/Cache/Exception/LogicException.php b/src/Symfony/Component/Cache/Exception/LogicException.php
@@ -14,6 +14,12 @@
 use Psr\Cache\CacheException as Psr6CacheInterface;
 use Psr\SimpleCache\CacheException as SimpleCacheInterface;
 
-class LogicException extends \LogicException implements Psr6CacheInterface, SimpleCacheInterface
-{
+if (interface_exists(SimpleCacheInterface::class)) {
+    class LogicException extends \LogicException implements Psr6CacheInterface, SimpleCacheInterface
+    {
+    }
+} else {
+    class LogicException extends \LogicException implements Psr6CacheInterface
+    {
+    }
 }
diff --git a/src/Symfony/Component/Cache/LockRegistry.php b/src/Symfony/Component/Cache/LockRegistry.php
@@ -45,6 +45,7 @@ class LockRegistry
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'PhpArrayAdapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'PhpFilesAdapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'ProxyAdapter.php',
+        __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'Psr16Adapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'RedisAdapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'SimpleCacheAdapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'TagAwareAdapter.php',