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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
*/
/**
* Pool implmentation for LoggerAppender instances.
*
* The pool is used when configuring log4php. First all appender instances
* are created in the pool. Afterward, they are linked to loggers, each
* appender can be linked to multiple loggers. This makes sure duplicate
* appenders are not created.
*
* @version $Revision: 1350602 $
* @package log4php
*/
class LoggerAppenderPool {
/** Holds appenders indexed by their name */
public static $appenders = array();
/**
* Adds an appender to the pool.
* The appender must be named for this operation.
* @param LoggerAppender $appender
*/
public static function add(LoggerAppender $appender) {
$name = $appender->getName();
if(empty($name)) {
trigger_error('log4php: Cannot add unnamed appender to pool.', E_USER_WARNING);
return;
}
if (isset(self::$appenders[$name])) {
trigger_error("log4php: Appender [$name] already exists in pool. Overwriting existing appender.", E_USER_WARNING);
}
self::$appenders[$name] = $appender;
}
/**
* Retrieves an appender from the pool by name.
* @param string $name Name of the appender to retrieve.
* @return LoggerAppender The named appender or NULL if no such appender
* exists in the pool.
*/
public static function get($name) {
return isset(self::$appenders[$name]) ? self::$appenders[$name] : null;
}
/**
* Removes an appender from the pool by name.
* @param string $name Name of the appender to remove.
*/
public static function delete($name) {
unset(self::$appenders[$name]);
}
/**
* Returns all appenders from the pool.
* @return array Array of LoggerAppender objects.
*/
public static function getAppenders() {
return self::$appenders;
}
/**
* Checks whether an appender exists in the pool.
* @param string $name Name of the appender to look for.
* @return boolean TRUE if the appender with the given name exists.
*/
public static function exists($name) {
return isset(self::$appenders[$name]);
}
/**
* Clears all appenders from the pool.
*/
public static function clear() {
self::$appenders = array();
}