symfony
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+1Lines changed: 1 addition & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+1Lines changed: 1 addition & 0 deletions
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+12Lines changed: 12 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+12Lines changed: 12 additions & 0 deletions
diff --git a/‎src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
+14Lines changed: 14 additions & 0 deletions b/‎src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
+14Lines changed: 14 additions & 0 deletions
@@ -995,6 +995,7 @@ private function addCacheSection(ArrayNodeDefinition $rootNode)
                                         ->info('Overwrite the setting from the default provider for this adapter.')
                                     ->end()
                                     ->scalarNode('clearer')->end()
+                                    ->booleanNode('keep_in_memory')->defaultFalse()->end()
                                 ->end()
                             ->end()
                             ->validate()
 
@@ -28,6 +28,7 @@
 use Symfony\Component\Cache\Adapter\AbstractAdapter;
 use Symfony\Component\Cache\Adapter\AdapterInterface;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
+use Symfony\Component\Cache\Adapter\ChainAdapter;
 use Symfony\Component\Cache\Adapter\TagAwareAdapter;
 use Symfony\Component\Cache\DependencyInjection\CachePoolPass;
 use Symfony\Component\Cache\Marshaller\DefaultMarshaller;
@@ -1797,6 +1798,17 @@ private function registerCacheConfiguration(array $config, ContainerBuilder $con
                 $name = '.'.$name.'.inner';
             }
             $definition->setPublic($pool['public']);
+
+            if ($config['pools'][$name]['keep_in_memory'] ?? false) {
+                $container->register($name.'.keep_in_memory', ChainAdapter::class)
+                    ->setDecoratedService($name)
+                    ->addArgument([
+                        new Definition(ArrayAdapter::class),
+                        new Reference($name.'.keep_in_memory.inner'),
+                    ])
+                    ->setPublic(true);
+            }
+
             unset($pool['adapter'], $pool['public'], $pool['tags']);
 
             $definition->addTag('cache.pool', $pool);
 
@@ -13,6 +13,7 @@
 
 use Symfony\Component\Cache\Adapter\AbstractAdapter;
 use Symfony\Component\Cache\Adapter\ArrayAdapter;
+use Symfony\Component\Cache\Adapter\ChainAdapter;
 use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -104,6 +105,19 @@ public function process(ContainerBuilder $container)
                 }
                 unset($tags[0][$attr]);
             }
+
+            if ($tags[0]['keep_in_memory'] ?? false) {
+                $container->register($id.'.keep_in_memory', ChainAdapter::class)
+                    ->setDecoratedService($id)
+                    ->addArgument([
+                        new Definition(ArrayAdapter::class),
+                        new Reference($id.'.keep_in_memory.inner'),
+                    ])
+                    ->setPublic(true);
+            }
+
+            unset($tags[0]['keep_in_memory']);
+
             if (!empty($tags[0])) {
                 throw new InvalidArgumentException(sprintf('Invalid "%s" tag for service "%s": accepted attributes are "clearer", "provider", "name", "namespace", "default_lifetime" and "reset", found "%s".', $this->cachePoolTag, $id, implode('", "', array_keys($tags[0]))));
             }