www.gusucode.com > 24Beta 虚拟主机版 1.0.0 Beta源码程序 > 24Beta 虚拟主机版 1.0.0 Beta源码程序/24Beta-1.0.0-vhost/library/framework/logging/CLogger.php
<?php /** * CLogger class file * * @author Qiang Xue <qiang.xue@gmail.com> * @link http://www.yiiframework.com/ * @copyright Copyright © 2008-2009 Yii Software LLC * @license http://www.yiiframework.com/license/ */ /** * CLogger records log messages in memory. * * CLogger implements the methods to retrieve the messages with * various filter conditions, including log levels and log categories. * * @author Qiang Xue <qiang.xue@gmail.com> * @version $Id: CLogger.php 1042 2009-05-21 19:53:47Z qiang.xue $ * @package system.logging * @since 1.0 */ class CLogger extends CComponent { const LEVEL_TRACE='trace'; const LEVEL_WARNING='warning'; const LEVEL_ERROR='error'; const LEVEL_INFO='info'; const LEVEL_PROFILE='profile'; /** * @var array log messages */ private $_logs=array(); /** * @var array log levels for filtering (used when filtering) */ private $_levels; /** * @var array log categories for filtering (used when filtering) */ private $_categories; /** * @var array the profiling results (category, token => time in seconds) * @since 1.0.6 */ private $_timings; /** * Logs a message. * Messages logged by this method may be retrieved back via {@link getLogs}. * @param string message to be logged * @param string level of the message (e.g. 'Trace', 'Warning', 'Error'). It is case-insensitive. * @param string category of the message (e.g. 'system.web'). It is case-insensitive. * @see getLogs */ public function log($message,$level='info',$category='application') { $this->_logs[]=array($message,$level,$category,microtime(true)); } /** * Retrieves log messages. * * Messages may be filtered by log levels and/or categories. * A level filter is specified by a list of levels separated by comma or space * (e.g. 'trace, error'). A category filter is similar to level filter * (e.g. 'system, system.web'). A difference is that in category filter * you can use pattern like 'system.*' to indicate all categories starting * with 'system'. * * If you do not specify level filter, it will bring back logs at all levels. * The same applies to category filter. * * Level filter and category filter are combinational, i.e., only messages * satisfying both filter conditions will be returned. * * @param string level filter * @param string category filter * @return array list of messages. Each array elements represents one message * with the following structure: * array( * [0] => message (string) * [1] => level (string) * [2] => category (string) * [3] => timestamp (float, obtained by microtime(true)); */ public function getLogs($levels='',$categories='') { $this->_levels=preg_split('/[\s,]+/',strtolower($levels),-1,PREG_SPLIT_NO_EMPTY); $this->_categories=preg_split('/[\s,]+/',strtolower($categories),-1,PREG_SPLIT_NO_EMPTY); if(empty($levels) && empty($categories)) return $this->_logs; else if(empty($levels)) return array_values(array_filter(array_filter($this->_logs,array($this,'filterByCategory')))); else if(empty($categories)) return array_values(array_filter(array_filter($this->_logs,array($this,'filterByLevel')))); else { $ret=array_values(array_filter(array_filter($this->_logs,array($this,'filterByLevel')))); return array_values(array_filter(array_filter($ret,array($this,'filterByCategory')))); } } /** * Filter function used by {@link getLogs} * @param array element to be filtered * @return array valid log, false if not. */ private function filterByCategory($value) { foreach($this->_categories as $category) { $cat=strtolower($value[2]); if($cat===$category || (($c=rtrim($category,'.*'))!==$category && strpos($cat,$c)===0)) return $value; } return false; } /** * Filter function used by {@link getLogs} * @param array element to be filtered * @return array valid log, false if not. */ private function filterByLevel($value) { return in_array(strtolower($value[1]),$this->_levels)?$value:false; } /** * Returns the total time for serving the current request. * This method calculates the difference between now and the timestamp * defined by constant YII_BEGIN_TIME. * To estimate the execution time more accurately, the constant should * be defined as early as possible (best at the beginning of the entry script.) * @return float the total time for serving the current request. */ public function getExecutionTime() { return microtime(true)-YII_BEGIN_TIME; } /** * Returns the memory usage of the current application. * This method relies on the PHP function memory_get_usage(). * If it is not available, the method will attempt to use OS programs * to determine the memory usage. A value 0 will be returned if the * memory usage can still not be determined. * @return integer memory usage of the application (in bytes). */ public function getMemoryUsage() { if(function_exists('memory_get_usage')) return memory_get_usage(); else { $output=array(); if(strncmp(PHP_OS,'WIN',3)===0) { exec('tasklist /FI "PID eq ' . getmypid() . '" /FO LIST',$output); return isset($output[5])?preg_replace('/[\D]/','',$output[5])*1024 : 0; } else { $pid=getmypid(); exec("ps -eo%mem,rss,pid | grep $pid", $output); $output=explode(" ",$output[0]); return isset($output[1]) ? $output[1]*1024 : 0; } } } /** * Returns the profiling results. * The results may be filtered by token and/or category. * If no filter is specified, the returned results would be an array with each element * being array($token,$category,$time). * If a filter is specified, the results would be an array of timings. * @param string token filter. Defaults to null, meaning not filtered by token. * @param string category filter. Defaults to null, meaning not filtered by category. * @param boolean whether to refresh the internal timing calculations. If false, * only the first time calling this method will the timings be calculated internally. * @return array the profiling results. * @since 1.0.6 */ public function getProfilingResults($token=null,$category=null,$refresh=false) { if($this->_timings===null || $refresh) $this->calculateTimings(); if($token===null && $category===null) return $this->_timings; $results=array(); foreach($this->_timings as $timing) { if(($category===null || $timing[1]===$category) && ($token===null || $timing[0]===$token)) $results[]=$timing[2]; } return $results; } private function calculateTimings() { $this->_timings=array(); $stack=array(); foreach($this->_logs as $log) { if($log[1]!==CLogger::LEVEL_PROFILE) continue; list($message,$level,$category,$timestamp)=$log; if(!strncasecmp($message,'begin:',6)) { $log[0]=substr($message,6); $stack[]=$log; } else if(!strncasecmp($message,'end:',4)) { $token=substr($message,4); if(($last=array_pop($stack))!==null && $last[0]===$token) { $delta=$log[3]-$last[3]; $this->_timings[]=array($message,$category,$delta); } else throw new CException(Yii::t('yii','CProfileLogRoute found a mismatching code block "{token}". Make sure the calls to Yii::beginProfile() and Yii::endProfile() be properly nested.', array('{token}'=>$token))); } } $now=microtime(true); while(($last=array_pop($stack))!==null) { $delta=$now-$last[3]; $this->_timings[]=array($last[0],$last[2],$delta); } } }