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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\console\controllers;
use Yii;
use yii\caching\ApcCache;
use yii\caching\CacheInterface;
use yii\console\Controller;
use yii\console\Exception;
use yii\console\ExitCode;
use yii\helpers\Console;
/**
* Allows you to flush cache.
*
* see list of available components to flush:
*
* yii cache
*
* flush particular components specified by their names:
*
* yii cache/flush first second third
*
* flush all cache components that can be found in the system
*
* yii cache/flush-all
*
* Note that the command uses cache components defined in your console application configuration file. If components
* configured are different from web application, web application cache won't be cleared. In order to fix it please
* duplicate web application cache components in console config. You can use any component names.
*
* APC is not shared between PHP processes so flushing cache from command line has no effect on web.
* Flushing web cache could be either done by:
*
* - Putting a php file under web root and calling it via HTTP
* - Using [Cachetool](http://gordalina.github.io/cachetool/)
*
* @author Alexander Makarov <sam@rmcreative.ru>
* @author Mark Jebri <mark.github@yandex.ru>
* @since 2.0
*/
class CacheController extends Controller
{
/**
* Lists the caches that can be flushed.
*/
public function actionIndex()
{
$caches = $this->findCaches();
if (!empty($caches)) {
$this->notifyCachesCanBeFlushed($caches);
} else {
$this->notifyNoCachesFound();
}
}
/**
* Flushes given cache components.
*
* For example,
*
* ```
* # flushes caches specified by their id: "first", "second", "third"
* yii cache/flush first second third
* ```
*/
public function actionFlush()
{
$cachesInput = func_get_args();
if (empty($cachesInput)) {
throw new Exception('You should specify cache components names');
}
$caches = $this->findCaches($cachesInput);
$cachesInfo = [];
$foundCaches = array_keys($caches);
$notFoundCaches = array_diff($cachesInput, array_keys($caches));
if ($notFoundCaches) {
$this->notifyNotFoundCaches($notFoundCaches);
}
if (!$foundCaches) {
$this->notifyNoCachesFound();
return ExitCode::OK;
}
if (!$this->confirmFlush($foundCaches)) {
return ExitCode::OK;
}
foreach ($caches as $name => $class) {
$cachesInfo[] = [
'name' => $name,
'class' => $class,
'is_flushed' => $this->canBeFlushed($class) ? Yii::$app->get($name)->flush() : false,
];
}
$this->notifyFlushed($cachesInfo);
}
/**
* Flushes all caches registered in the system.
*/
public function actionFlushAll()
{
$caches = $this->findCaches();
$cachesInfo = [];
if (empty($caches)) {
$this->notifyNoCachesFound();
return ExitCode::OK;
}
foreach ($caches as $name => $class) {
$cachesInfo[] = [
'name' => $name,
'class' => $class,
'is_flushed' => $this->canBeFlushed($class) ? Yii::$app->get($name)->flush() : false,
];
}
$this->notifyFlushed($cachesInfo);
}
/**
* Clears DB schema cache for a given connection component.
*
* ```
* # clears cache schema specified by component id: "db"
* yii cache/flush-schema db
* ```
*
* @param string $db id connection component
* @return int exit code
* @throws Exception
* @throws \yii\base\InvalidConfigException
*
* @since 2.0.1
*/
public function actionFlushSchema($db = 'db')
{
$connection = Yii::$app->get($db, false);
if ($connection === null) {
$this->stdout("Unknown component \"$db\".\n", Console::FG_RED);
return ExitCode::UNSPECIFIED_ERROR;
}
if (!$connection instanceof \yii\db\Connection) {
$this->stdout("\"$db\" component doesn't inherit \\yii\\db\\Connection.\n", Console::FG_RED);
return ExitCode::UNSPECIFIED_ERROR;
} elseif (!$this->confirm("Flush cache schema for \"$db\" connection?")) {
return ExitCode::OK;
}
try {
$schema = $connection->getSchema();
$schema->refresh();
$this->stdout("Schema cache for component \"$db\", was flushed.\n\n", Console::FG_GREEN);
} catch (\Exception $e) {
$this->stdout($e->getMessage() . "\n\n", Console::FG_RED);
}
}
/**
* Notifies user that given caches are found and can be flushed.
* @param array $caches array of cache component classes
*/
private function notifyCachesCanBeFlushed($caches)
{
$this->stdout("The following caches were found in the system:\n\n", Console::FG_YELLOW);
foreach ($caches as $name => $class) {
if ($this->canBeFlushed($class)) {
$this->stdout("\t* $name ($class)\n", Console::FG_GREEN);
} else {
$this->stdout("\t* $name ($class) - can not be flushed via console\n", Console::FG_YELLOW);
}
}
$this->stdout("\n");
}
/**
* Notifies user that there was not found any cache in the system.
*/
private function notifyNoCachesFound()
{
$this->stdout("No cache components were found in the system.\n", Console::FG_RED);
}
/**
* Notifies user that given cache components were not found in the system.
* @param array $cachesNames
*/
private function notifyNotFoundCaches($cachesNames)
{
$this->stdout("The following cache components were NOT found:\n\n", Console::FG_RED);
foreach ($cachesNames as $name) {
$this->stdout("\t* $name \n", Console::FG_GREEN);
}
$this->stdout("\n");
}
/**
* @param array $caches
*/
private function notifyFlushed($caches)
{
$this->stdout("The following cache components were processed:\n\n", Console::FG_YELLOW);
foreach ($caches as $cache) {
$this->stdout("\t* " . $cache['name'] . ' (' . $cache['class'] . ')', Console::FG_GREEN);
if (!$cache['is_flushed']) {
$this->stdout(" - not flushed\n", Console::FG_RED);
} else {
$this->stdout("\n");
}
}
$this->stdout("\n");
}
/**
* Prompts user with confirmation if caches should be flushed.
* @param array $cachesNames
* @return bool
*/
private function confirmFlush($cachesNames)
{
$this->stdout("The following cache components will be flushed:\n\n", Console::FG_YELLOW);
foreach ($cachesNames as $name) {
$this->stdout("\t* $name \n", Console::FG_GREEN);
}
return $this->confirm("\nFlush above cache components?");
}
/**
* Returns array of caches in the system, keys are cache components names, values are class names.
* @param array $cachesNames caches to be found
* @return array
*/
private function findCaches(array $cachesNames = [])
{
$caches = [];
$components = Yii::$app->getComponents();
$findAll = ($cachesNames === []);
foreach ($components as $name => $component) {
if (!$findAll && !in_array($name, $cachesNames, true)) {
continue;
}
if ($component instanceof CacheInterface) {
$caches[$name] = get_class($component);
} elseif (is_array($component) && isset($component['class']) && $this->isCacheClass($component['class'])) {
$caches[$name] = $component['class'];
} elseif (is_string($component) && $this->isCacheClass($component)) {
$caches[$name] = $component;
} elseif ($component instanceof \Closure) {
$cache = Yii::$app->get($name);
if ($this->isCacheClass($cache)) {
$cacheClass = get_class($cache);
$caches[$name] = $cacheClass;
}
}
}
return $caches;
}
/**
* Checks if given class is a Cache class.
* @param string $className class name.
* @return bool
*/
private function isCacheClass($className)
{
return is_subclass_of($className, 'yii\caching\CacheInterface') || $className === 'yii\caching\CacheInterface';
}
/**
* Checks if cache of a certain class can be flushed.
* @param string $className class name.
* @return bool
*/
private function canBeFlushed($className)
{
return !is_a($className, ApcCache::className(), true) || PHP_SAPI !== 'cli';
}
}
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