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<?php
use Wikimedia\Rdbms\ILoadBalancer;
/**
* A service class for fetching the wiki's current read-only mode.
* To obtain an instance, use MediaWikiServices::getInstance()->getReadOnlyMode().
*
* @since 1.29
*/
class ReadOnlyMode {
/** @var ConfiguredReadOnlyMode */
private $configuredReadOnly;
/** @var ILoadBalancer */
private $loadBalancer;
public function __construct( ConfiguredReadOnlyMode $cro, ILoadBalancer $loadBalancer ) {
$this->configuredReadOnly = $cro;
$this->loadBalancer = $loadBalancer;
}
/**
* Check whether the wiki is in read-only mode.
*
* @return bool
*/
public function isReadOnly() {
return $this->getReason() !== false;
}
/**
* Check if the site is in read-only mode and return the message if so
*
* This checks the configuration and registered DB load balancers for
* read-only mode. This may result in DB connection being made.
*
* @return string|bool String when in read-only mode; false otherwise
*/
public function getReason() {
$reason = $this->configuredReadOnly->getReason();
if ( $reason !== false ) {
return $reason;
}
$reason = $this->loadBalancer->getReadOnlyReason();
if ( $reason !== false && $reason !== null ) {
return $reason;
}
return false;
}
/**
* Set the read-only mode, which will apply for the remainder of the
* request or until a service reset.
*
* @param string|null $msg
*/
public function setReason( $msg ) {
$this->configuredReadOnly->setReason( $msg );
}
}
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