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<?php
/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

namespace MediaWiki\Logger;

use Psr\Log\NullLogger;

/**
 * LoggerFactory service provider that creates \\Psr\\Log\\NullLogger
 * instances. A NullLogger silently discards all log events sent to it.
 *
 * Usage:
 * @code
 * $wgMWLoggerDefaultSpi = array(
 *   'class' => '\\MediaWiki\\Logger\\NullSpi',
 * );
 * @endcode
 *
 * @see \\MediaWiki\\Logger\\LoggerFactory
 * @since 1.25
 * @author Bryan Davis <bd808@wikimedia.org>
 * @copyright © 2014 Bryan Davis and Wikimedia Foundation.
 */
class NullSpi implements Spi {

	/**
	 * @var \\Psr\\Log\\NullLogger $singleton
	 */
	protected $singleton;


	public function __construct() {
		$this->singleton = new NullLogger();
	}


	/**
	 * Get a logger instance.
	 *
	 * @param string $channel Logging channel
	 * @return \\Psr\\Log\\NullLogger Logger instance
	 */
	public function getLogger( $channel ) {
		return $this->singleton;
	}

}