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import v1.0.0-RC4 | 2009-05-20

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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Log
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Log.php 9382 2008-05-05 18:55:55Z doctorrock83 $
*/
/** Zend_Log_Filter_Priority */
require_once 'Zend/Log/Filter/Priority.php';
/**
* @category Zend
* @package Zend_Log
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Log.php 9382 2008-05-05 18:55:55Z doctorrock83 $
*/
class Zend_Log
{
const EMERG = 0; // Emergency: system is unusable
const ALERT = 1; // Alert: action must be taken immediately
const CRIT = 2; // Critical: critical conditions
const ERR = 3; // Error: error conditions
const WARN = 4; // Warning: warning conditions
const NOTICE = 5; // Notice: normal but significant condition
const INFO = 6; // Informational: informational messages
const DEBUG = 7; // Debug: debug messages
/**
* @var array of priorities where the keys are the
* priority numbers and the values are the priority names
*/
protected $_priorities = array();
/**
* @var array of Zend_Log_Writer_Abstract
*/
protected $_writers = array();
/**
* @var array of Zend_Log_Filter_Interface
*/
protected $_filters = array();
/**
* @var array of extra log event
*/
protected $_extras = array();
/**
* Class constructor. Create a new logger
*
* @param Zend_Log_Writer_Abstract|null $writer default writer
*/
public function __construct(Zend_Log_Writer_Abstract $writer = null)
{
$r = new ReflectionClass($this);
$this->_priorities = array_flip($r->getConstants());
if ($writer !== null) {
$this->addWriter($writer);
}
}
/**
* Class destructor. Shutdown log writers
*
* @return void
*/
public function __destruct()
{
foreach($this->_writers as $writer) {
$writer->shutdown();
}
}
/**
* Undefined method handler allows a shortcut:
* $log->priorityName('message')
* instead of
* $log->log('message', Zend_Log::PRIORITY_NAME)
*
* @param string $method priority name
* @param string $params message to log
* @return void
* @throws Zend_Log_Exception
*/
public function __call($method, $params)
{
$priority = strtoupper($method);
if (($priority = array_search($priority, $this->_priorities)) !== false) {
$this->log(array_shift($params), $priority);
} else {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('Bad log priority');
}
}
/**
* Log a message at a priority
*
* @param string $message Message to log
* @param integer $priority Priority of message
* @return void
* @throws Zend_Log_Exception
*/
public function log($message, $priority)
{
// sanity checks
if (empty($this->_writers)) {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('No writers were added');
}
if (! isset($this->_priorities[$priority])) {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('Bad log priority');
}
// pack into event required by filters and writers
$event = array_merge(array('timestamp' => date('c'),
'message' => $message,
'priority' => $priority,
'priorityName' => $this->_priorities[$priority]),
$this->_extras);
// abort if rejected by the global filters
foreach ($this->_filters as $filter) {
if (! $filter->accept($event)) {
return;
}
}
// send to each writer
foreach ($this->_writers as $writer) {
$writer->write($event);
}
}
/**
* Add a custom priority
*
* @param string $name Name of priority
* @param integer $priority Numeric priority
* @throws Zend_Log_InvalidArgumentException
*/
public function addPriority($name, $priority)
{
// Priority names must be uppercase for predictability.
$name = strtoupper($name);
if (isset($this->_priorities[$priority])
|| array_search($name, $this->_priorities)) {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('Existing priorities cannot be overwritten');
}
$this->_priorities[$priority] = $name;
}
/**
* Add a filter that will be applied before all log writers.
* Before a message will be received by any of the writers, it
* must be accepted by all filters added with this method.
*
* @param int|Zend_Log_Filter_Interface $filter
* @return void
*/
public function addFilter($filter)
{
if (is_integer($filter)) {
$filter = new Zend_Log_Filter_Priority($filter);
} elseif(!is_object($filter) || ! $filter instanceof Zend_Log_Filter_Interface) {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('Invalid filter provided');
}
$this->_filters[] = $filter;
}
/**
* Add a writer. A writer is responsible for taking a log
* message and writing it out to storage.
*
* @param Zend_Log_Writer_Abstract $writer
* @return void
*/
public function addWriter(Zend_Log_Writer_Abstract $writer)
{
$this->_writers[] = $writer;
}
/**
* Set an extra item to pass to the log writers.
*
* @param $name Name of the field
* @param $value Value of the field
* @return void
*/
public function setEventItem($name, $value) {
$this->_extras = array_merge($this->_extras, array($name => $value));
}
}