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silverstripe-framework/thirdparty/Zend/Log.php

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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) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Log.php 23783 2011-03-01 21:47:35Z intiilapa $
*/
/**
* @category Zend
* @package Zend_Log
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Log.php 23783 2011-03-01 21:47:35Z intiilapa $
*/
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();
/**
*
* @var string
*/
protected $_defaultWriterNamespace = 'Zend_Log_Writer';
/**
*
* @var string
*/
protected $_defaultFilterNamespace = 'Zend_Log_Filter';
/**
*
* @var string
*/
protected $_defaultFormatterNamespace = 'Zend_Log_Formatter';
/**
*
* @var callback
*/
protected $_origErrorHandler = null;
/**
*
* @var boolean
*/
protected $_registeredErrorHandler = false;
/**
*
* @var array|boolean
*/
protected $_errorHandlerMap = false;
/**
*
* @var string
*/
protected $_timestampFormat = 'c';
/**
* Class constructor. Create a new logger
*
* @param Zend_Log_Writer_Abstract|null $writer default writer
* @return void
*/
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);
}
}
/**
* Factory to construct the logger and one or more writers
* based on the configuration array
*
* @param array|Zend_Config Array or instance of Zend_Config
* @return Zend_Log
* @throws Zend_Log_Exception
*/
static public function factory($config = array())
{
if ($config instanceof Zend_Config) {
$config = $config->toArray();
}
if (!is_array($config) || empty($config)) {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('Configuration must be an array or instance of Zend_Config');
}
$log = new self;
if (array_key_exists('timestampFormat', $config)) {
if (null != $config['timestampFormat'] && '' != $config['timestampFormat']) {
$log->setTimestampFormat($config['timestampFormat']);
}
unset($config['timestampFormat']);
}
if (!is_array(current($config))) {
$log->addWriter(current($config));
} else {
foreach($config as $writer) {
$log->addWriter($writer);
}
}
return $log;
}
/**
* Construct a writer object based on a configuration array
*
* @param array $spec config array with writer spec
* @return Zend_Log_Writer_Abstract
* @throws Zend_Log_Exception
*/
protected function _constructWriterFromConfig($config)
{
$writer = $this->_constructFromConfig('writer', $config, $this->_defaultWriterNamespace);
if (!$writer instanceof Zend_Log_Writer_Abstract) {
$writerName = is_object($writer)
? get_class($writer)
: 'The specified writer';
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception("{$writerName} does not extend Zend_Log_Writer_Abstract!");
}
if (isset($config['filterName'])) {
$filter = $this->_constructFilterFromConfig($config);
$writer->addFilter($filter);
}
if (isset($config['formatterName'])) {
$formatter = $this->_constructFormatterFromConfig($config);
$writer->setFormatter($formatter);
}
return $writer;
}
/**
* Construct filter object from configuration array or Zend_Config object
*
* @param array|Zend_Config $config Zend_Config or Array
* @return Zend_Log_Filter_Interface
* @throws Zend_Log_Exception
*/
protected function _constructFilterFromConfig($config)
{
$filter = $this->_constructFromConfig('filter', $config, $this->_defaultFilterNamespace);
if (!$filter instanceof Zend_Log_Filter_Interface) {
$filterName = is_object($filter)
? get_class($filter)
: 'The specified filter';
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception("{$filterName} does not implement Zend_Log_Filter_Interface");
}
return $filter;
}
/**
* Construct formatter object from configuration array or Zend_Config object
*
* @param array|Zend_Config $config Zend_Config or Array
* @return Zend_Log_Formatter_Interface
* @throws Zend_Log_Exception
*/
protected function _constructFormatterFromConfig($config)
{
$formatter = $this->_constructFromConfig('formatter', $config, $this->_defaultFormatterNamespace);
if (!$formatter instanceof Zend_Log_Formatter_Interface) {
$formatterName = is_object($formatter)
? get_class($formatter)
: 'The specified formatter';
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception($formatterName . ' does not implement Zend_Log_Formatter_Interface');
}
return $formatter;
}
/**
* Construct a filter or writer from config
*
* @param string $type 'writer' of 'filter'
* @param mixed $config Zend_Config or Array
* @param string $namespace
* @return object
* @throws Zend_Log_Exception
*/
protected function _constructFromConfig($type, $config, $namespace)
{
if ($config instanceof Zend_Config) {
$config = $config->toArray();
}
if (!is_array($config) || empty($config)) {
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception(
'Configuration must be an array or instance of Zend_Config'
);
}
$params = isset($config[ $type .'Params' ]) ? $config[ $type .'Params' ] : array();
$className = $this->getClassName($config, $type, $namespace);
if (!class_exists($className)) {
require_once 'Zend/Loader.php';
Zend_Loader::loadClass($className);
}
$reflection = new ReflectionClass($className);
if (!$reflection->implementsInterface('Zend_Log_FactoryInterface')) {
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception(
$className . ' does not implement Zend_Log_FactoryInterface and can not be constructed from config.'
);
}
return call_user_func(array($className, 'factory'), $params);
}
/**
* Get the writer or filter full classname
*
* @param array $config
* @param string $type filter|writer
* @param string $defaultNamespace
* @return string full classname
* @throws Zend_Log_Exception
*/
protected function getClassName($config, $type, $defaultNamespace)
{
if (!isset($config[ $type . 'Name' ])) {
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception("Specify {$type}Name in the configuration array");
}
$className = $config[ $type . 'Name' ];
$namespace = $defaultNamespace;
if (isset($config[ $type . 'Namespace' ])) {
$namespace = $config[ $type . 'Namespace' ];
}
$fullClassName = $namespace . '_' . $className;
return $fullClassName;
}
/**
* Packs message and priority into Event array
*
* @param string $message Message to log
* @param integer $priority Priority of message
* @return array Event array
*/
protected function _packEvent($message, $priority)
{
return array_merge(array(
'timestamp' => date($this->_timestampFormat),
'message' => $message,
'priority' => $priority,
'priorityName' => $this->_priorities[$priority]
),
$this->_extras
);
}
/**
* Class destructor. Shutdown log writers
*
* @return void
*/
public function __destruct()
{
foreach($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, $this->_priorities)) !== false) {
switch (count($params)) {
case 0:
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception('Missing log message');
case 1:
$message = array_shift($params);
$extras = null;
break;
default:
$message = array_shift($params);
$extras = array_shift($params);
break;
}
$this->log($message, $priority, $extras);
} 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
* @param mixed $extras Extra information to log in event
* @return void
* @throws Zend_Log_Exception
*/
public function log($message, $priority, $extras = null)
{
// sanity checks
if (empty($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 = $this->_packEvent($message, $priority);
// Check to see if any extra information was passed
if (!empty($extras)) {
$info = array();
if (is_array($extras)) {
foreach ($extras as $key => $value) {
if (is_string($key)) {
$event[$key] = $value;
} else {
$info[] = $value;
}
}
} else {
$info = $extras;
}
if (!empty($info)) {
$event['info'] = $info;
}
}
// abort if rejected by the global filters
foreach ($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 $priority Numeric priority
* @throws Zend_Log_Exception
*/
public function addPriority($name, $priority)
{
// Priority names must be uppercase for predictability.
$name = strtoupper($name);
if (isset($this->_priorities[$priority])
|| false !== 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;
return $this;
}
/**
* 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_Config|array|Zend_Log_Filter_Interface $filter
* @return Zend_Log
* @throws Zend_Log_Exception
*/
public function addFilter($filter)
{
if (is_int($filter)) {
/** @see Zend_Log_Filter_Priority */
require_once 'Zend/Log/Filter/Priority.php';
$filter = new Zend_Log_Filter_Priority($filter);
} elseif ($filter instanceof Zend_Config || is_array($filter)) {
$filter = $this->_constructFilterFromConfig($filter);
} elseif(! $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;
return $this;
}
/**
* Add a writer. A writer is responsible for taking a log
* message and writing it out to storage.
*
* @param mixed $writer Zend_Log_Writer_Abstract or Config array
* @return Zend_Log
*/
public function addWriter($writer)
{
if (is_array($writer) || $writer instanceof Zend_Config) {
$writer = $this->_constructWriterFromConfig($writer);
}
if (!$writer instanceof Zend_Log_Writer_Abstract) {
/** @see Zend_Log_Exception */
require_once 'Zend/Log/Exception.php';
throw new Zend_Log_Exception(
'Writer must be an instance of Zend_Log_Writer_Abstract'
. ' or you should pass a configuration array'
);
}
$this->_writers[] = $writer;
return $this;
}
/**
* Set an extra item to pass to the log writers.
*
* @param string $name Name of the field
* @param string $value Value of the field
* @return Zend_Log
*/
public function setEventItem($name, $value)
{
$this->_extras = array_merge($this->_extras, array($name => $value));
return $this;
}
/**
* Register Logging system as an error handler to log php errors
* Note: it still calls the original error handler if set_error_handler is able to return it.
*
* Errors will be mapped as:
* E_NOTICE, E_USER_NOTICE => NOTICE
* E_WARNING, E_CORE_WARNING, E_USER_WARNING => WARN
* E_ERROR, E_USER_ERROR, E_CORE_ERROR, E_RECOVERABLE_ERROR => ERR
* E_DEPRECATED, E_STRICT, E_USER_DEPRECATED => DEBUG
* (unknown/other) => INFO
*
* @link http://www.php.net/manual/en/function.set-error-handler.php Custom error handler
*
* @return Zend_Log
*/
public function registerErrorHandler()
{
// Only register once. Avoids loop issues if it gets registered twice.
if ($this->_registeredErrorHandler) {
return $this;
}
$this->_origErrorHandler = set_error_handler(array($this, 'errorHandler'));
// Contruct a default map of phpErrors to Zend_Log priorities.
// Some of the errors are uncatchable, but are included for completeness
$this->_errorHandlerMap = array(
E_NOTICE => Zend_Log::NOTICE,
E_USER_NOTICE => Zend_Log::NOTICE,
E_WARNING => Zend_Log::WARN,
E_CORE_WARNING => Zend_Log::WARN,
E_USER_WARNING => Zend_Log::WARN,
E_ERROR => Zend_Log::ERR,
E_USER_ERROR => Zend_Log::ERR,
E_CORE_ERROR => Zend_Log::ERR,
E_RECOVERABLE_ERROR => Zend_Log::ERR,
E_STRICT => Zend_Log::DEBUG,
);
// PHP 5.3.0+
if (defined('E_DEPRECATED')) {
$this->_errorHandlerMap['E_DEPRECATED'] = Zend_Log::DEBUG;
}
if (defined('E_USER_DEPRECATED')) {
$this->_errorHandlerMap['E_USER_DEPRECATED'] = Zend_Log::DEBUG;
}
$this->_registeredErrorHandler = true;
return $this;
}
/**
* Error Handler will convert error into log message, and then call the original error handler
*
* @link http://www.php.net/manual/en/function.set-error-handler.php Custom error handler
* @param int $errno
* @param string $errstr
* @param string $errfile
* @param int $errline
* @param array $errcontext
* @return boolean
*/
public function errorHandler($errno, $errstr, $errfile, $errline, $errcontext)
{
$errorLevel = error_reporting();
if ($errorLevel && $errno) {
if (isset($this->_errorHandlerMap[$errno])) {
$priority = $this->_errorHandlerMap[$errno];
} else {
$priority = Zend_Log::INFO;
}
$this->log($errstr, $priority, array('errno'=>$errno, 'file'=>$errfile, 'line'=>$errline, 'context'=>$errcontext));
}
if ($this->_origErrorHandler !== null) {
return call_user_func($this->_origErrorHandler, $errno, $errstr, $errfile, $errline, $errcontext);
}
return false;
}
/**
* Set timestamp format for log entries.
*
* @param string $format
* @return Zend_Log
*/
public function setTimestampFormat($format)
{
$this->_timestampFormat = $format;
return $this;
}
/**
* Get timestamp format used for log entries.
*
* @return string
*/
public function getTimestampFormat()
{
return $this->_timestampFormat;
}
}
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