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Diffstat (limited to 'framework/Util/TLogger.php')
| -rw-r--r-- | framework/Util/TLogger.php | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/framework/Util/TLogger.php b/framework/Util/TLogger.php new file mode 100644 index 00000000..632c46f1 --- /dev/null +++ b/framework/Util/TLogger.php @@ -0,0 +1,130 @@ +<?php
+/**
+ * TLogger class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright © 2005 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Revision: $ $Date: $
+ * @package System.Util
+ */
+
+/**
+ * TLogger class.
+ *
+ * TLogger records log messages in memory and implements the methods to
+ * retrieve the messages with filter conditions, including log levels and
+ * log categories.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Revision: $ $Date: $
+ * @package System.Util
+ * @since 3.0
+ */
+class TLogger extends TComponent
+{
+ /**
+ * Log levels.
+ */
+ const DEBUG=0x01;
+ const INFO=0x02;
+ const NOTICE=0x04;
+ const WARNING=0x08;
+ const ERROR=0x10;
+ const ALERT=0x20;
+ const FATAL=0x40;
+ /**
+ * @var array log messages
+ */
+ private $_logs=array();
+ /**
+ * @var integer log levels (bits) to be filtered
+ */
+ private $_levels;
+ /**
+ * @var array list of categories to be filtered
+ */
+ private $_categories;
+
+ /**
+ * Logs a message.
+ * Messages logged by this method may be retrieved via {@link getLogs}.
+ * @param string message to be logged
+ * @param integer level of the message. Valid values include
+ * TLogger::DEBUG, TLogger::INFO, TLogger::NOTICE, TLogger::WARNING,
+ * TLogger::ERROR, TLogger::ALERT, TLogger::FATAL.
+ * @param string category of the message
+ */
+ public function log($message,$level,$category='Uncategorized')
+ {
+ $this->_logs[]=array($message,$level,$category,microtime(true));
+ }
+
+ /**
+ * Retrieves log messages.
+ * Messages may be filtered by log levels and/or categories.
+ * A level filter is specified by an integer, whose bits indicate the levels interested.
+ * For example, (TLogger::INFO | TLogger::WARNING) specifies INFO and WARNING levels.
+ * A category filter is specified by concatenating interested category names
+ * with commas. A message whose category name starts with any filtering category
+ * will be returned. For example, a category filter 'System.Web, System.IO'
+ * will return messages under categories such as 'System.Web', 'System.IO',
+ * 'System.Web.UI', 'System.Web.UI.WebControls', etc.
+ * Level filter and category filter are combinational, i.e., only messages
+ * satisfying both filter conditions will they be returned.
+ * @param integer level filter
+ * @param string category filter
+ * @param array list of messages. Each array elements represents one message
+ * with the following structure:
+ * array(
+ * [0] => message
+ * [1] => level
+ * [2] => category
+ * [3] => timestamp);
+ */
+ public function getLogs($levels=null,$categories=null)
+ {
+ $this->_levels=$levels;
+ $this->_categories=$categories;
+ if(empty($levels) && empty($categories))
+ return $this->_logs;
+ else if(empty($levels))
+ return array_values(array_filter(array_filter($this->_logs,array($this,'filterByCategories'))));
+ else if(empty($categories))
+ return array_values(array_filter(array_filter($this->_logs,array($this,'filterByLevels'))));
+ else
+ {
+ $ret=array_values(array_filter(array_filter($this->_logs,array($this,'filterByLevels'))));
+ return array_values(array_filter(array_filter($ret,array($this,'filterByCategories'))));
+ }
+ }
+
+ /**
+ * Filter function used by {@link getLogs}
+ * @param array element to be filtered
+ */
+ private function filterByCategories($value)
+ {
+ foreach($this->_categories as $category)
+ {
+ if($value[2]===$category || strpos($value[2],$category.'.')===0)
+ return $value;
+ }
+ return false;
+ }
+
+ /**
+ * Filter function used by {@link getLogs}
+ * @param array element to be filtered
+ */
+ private function filterByLevels($value)
+ {
+ if($value[1] & $this->_levels)
+ return $value;
+ else
+ return false;
+ }
+}
+
+?>
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