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<?php
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @package log4php
*/
/**
* The LoggerMDC class provides _mapped diagnostic contexts_.
*
* A Mapped Diagnostic Context, or MDC in short, is an instrument for
* distinguishing interleaved log output from different sources. Log output
* is typically interleaved when a server handles multiple clients
* near-simultaneously.
*
* This class is similar to the {@link LoggerNDC} class except that
* it is based on a map instead of a stack.
*
* @version $Revision: 1343630 $
* @since 0.3
* @package log4php
*/
class LoggerMDC {
/** Holds the context map. */
private static $map = array();
/**
* Stores a context value as identified with the key parameter into the
* context map.
*
* @param string $key the key
* @param string $value the value
*/
public static function put($key, $value) {
self::$map[$key] = $value;
}
/**
* Returns the context value identified by the key parameter.
*
* @param string $key The key.
* @return string The context or an empty string if no context found
* for given key.
*/
public static function get($key) {
return isset(self::$map[$key]) ? self::$map[$key] : '';
}
/**
* Returns the contex map as an array.
* @return array The MDC context map.
*/
public static function getMap() {
return self::$map;
}
/**
* Removes the the context identified by the key parameter.
*
* Only affects user mappings, not $_ENV or $_SERVER.
*
* @param string $key The key to be removed.
*/
public static function remove($key) {
unset(self::$map[$key]);
}
/**
* Clears the mapped diagnostic context.
*/
public static function clear() {
self::$map = array();
}
}