This File adapter provides basic support for write, read, delete
and clear cache functionality, as well as allowing the first four
methods to be filtered as per the Lithium filtering system. The File adapter
is a very simple cache, and should only be used for prototyping or for specifically
caching _files_. For more general caching needs, please consider using a more
appropriate cache adapter.
This adapter does *not* provide increment/decrement functionality. For such
functionality, please use a more approrpiate cache adapter.
This adapter does *not* allow multi-key operations for any methods.
The path that the cached files will be written to defaults to
LITHIUM_APP_PATH/resources/tmp/cache, but is user-configurable on cache configuration.
Note that the cache expiration time is stored within the first few bytes
of the cached data, and is transparently added and/or removed when values
are stored and/or retrieved from the cache.
public function testWriteDefaultCacheExpiry()
{
$file = new File(array('expiry' => '+1 minute'));
$key = 'default_keykey';
$data = 'data';
$time = time() + 60;
$closure = $file->write($key, $data);
$this->assertTrue(is_callable($closure));
$params = compact('key', 'data');
$result = $closure($file, $params, null);
$expected = 25;
$this->assertEqual($expected, $result);
$this->assertTrue(file_exists(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"));
$this->assertEqual(file_get_contents(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"), "{:expiry:{$time}}\ndata");
$this->assertTrue(unlink(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"));
$this->assertFalse(file_exists(Libraries::get(true, 'resources') . "/tmp/cache/{$key}"));
}
public function testIncrementWithScope()
{
$adapter = new File(array('scope' => 'primary'));
$this->File->write(array('primary_key1' => 5));
$this->File->write(array('key1' => 10));
$expected = 6;
$result = $adapter->increment('key1');
$this->assertEqual($expected, $result);
$expected = array('key1' => 6);
$result = $adapter->read(array('key1'));
$this->assertEqual($expected, $result);
}
