SQLiteJournal: checking for extension pdo_sqlite is lazy, service cache.journal is created always

Author: dg

composer.json

@@ -23,6 +23,9 @@
 		"nette/di": "~2.3",
 		"latte/latte": "~2.3.0"
 	},
+	"suggest": {
+		"ext-pdo_sqlite": "to use SQLiteStorage or SQLiteJournal"
+	},
 	"conflict": {
 		"nette/nette": "<2.2"
 	},

src/Bridges/CacheDI/CacheExtension.php

@@ -29,20 +29,16 @@ public function loadConfiguration()
 	{
 		$builder = $this->getContainerBuilder();
 
-		if (extension_loaded('pdo_sqlite')) {
-			$builder->addDefinition($this->prefix('journal'))
-				->setClass('Nette\Caching\Storages\IJournal')
-				->setFactory('Nette\Caching\Storages\SQLiteJournal', [$this->tempDir . '/cache/journal.s3db']);
-		}
+		$builder->addDefinition($this->prefix('journal'))
+			->setClass('Nette\Caching\Storages\IJournal')
+			->setFactory('Nette\Caching\Storages\SQLiteJournal', [$this->tempDir . '/cache/journal.s3db']);
 
 		$builder->addDefinition($this->prefix('storage'))
 			->setClass('Nette\Caching\IStorage')
 			->setFactory('Nette\Caching\Storages\FileStorage', [$this->tempDir . '/cache']);
 
 		if ($this->name === 'cache') {
-			if (extension_loaded('pdo_sqlite')) {
-				$builder->addAlias('nette.cacheJournal', $this->prefix('journal'));
-			}
+			$builder->addAlias('nette.cacheJournal', $this->prefix('journal'));
 			$builder->addAlias('cacheStorage', $this->prefix('storage'));
 		}
 	}

src/Caching/Storages/SQLiteJournal.php

@@ -28,15 +28,16 @@ class SQLiteJournal extends Nette\Object implements IJournal
 	 */
 	public function __construct($path = ':memory:')
 	{
-		if (!extension_loaded('pdo_sqlite')) {
-			throw new Nette\NotSupportedException('SQLiteJournal requires PHP extension pdo_sqlite which is not loaded.');
-		}
 		$this->path = $path;
 	}
 
 
 	private function open()
 	{
+		if (!extension_loaded('pdo_sqlite')) {
+			throw new Nette\NotSupportedException('SQLiteJournal requires PHP extension pdo_sqlite which is not loaded.');
+		}
+
 		$this->pdo = new \PDO('sqlite:' . $this->path);
 		$this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
 		$this->pdo->exec('