1 | <?php
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2 | /**
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3 | * log4php is a PHP port of the log4j java logging package.
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4 | *
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5 | * <p>This framework is based on log4j (see {@link http://jakarta.apache.org/log4j log4j} for details).</p>
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6 | * <p>Design, strategies and part of the methods documentation are developed by log4j team
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7 | * (Ceki Gülcü as log4j project founder and
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8 | * {@link http://jakarta.apache.org/log4j/docs/contributors.html contributors}).</p>
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9 | *
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10 | * <p>PHP port, extensions and modifications by VxR. All rights reserved.<br>
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11 | * For more information, please see {@link http://www.vxr.it/log4php/}.</p>
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12 | *
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13 | * <p>This software is published under the terms of the LGPL License
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14 | * a copy of which has been included with this distribution in the LICENSE file.</p>
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15 | *
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16 | * @package log4php
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17 | */
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18 |
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19 | /**
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20 | * @ignore
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21 | */
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22 | if (!defined('LOG4PHP_DIR')) define('LOG4PHP_DIR', dirname(__FILE__));
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23 |
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24 | /**
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25 | */
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26 | require_once(LOG4PHP_DIR . '/LoggerAppender.php');
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27 | require_once(LOG4PHP_DIR . '/LoggerLayout.php');
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28 | require_once(LOG4PHP_DIR . '/spi/LoggerFilter.php');
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29 | require_once(LOG4PHP_DIR . '/spi/LoggerLoggingEvent.php');
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30 | require_once(LOG4PHP_DIR . '/helpers/LoggerOptionConverter.php');
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31 |
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32 | /**
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33 | * Abstract superclass of the other appenders in the package.
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34 | *
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35 | * This class provides the code for common functionality, such as
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36 | * support for threshold filtering and support for general filters.
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37 | *
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38 | * @author VxR <vxr@vxr.it>
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39 | * @author Sergio Strampelli <sergio@ascia.net>
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40 | * @version $Revision: 1.12 $
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41 | * @package log4php
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42 | * @abstract
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43 | */
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44 | class LoggerAppenderSkeleton extends LoggerAppender {
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45 |
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46 | /**
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47 | * @var boolean closed appender flag
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48 | */
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49 | var $closed;
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50 |
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51 | /**
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52 | * @var object unused
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53 | */
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54 | var $errorHandler;
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55 |
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56 | /**
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57 | * The first filter in the filter chain
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58 | * @var LoggerFilter
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59 | */
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60 | var $headFilter = null;
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61 |
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62 | /**
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63 | * LoggerLayout for this appender. It can be null if appender has its own layout
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64 | * @var LoggerLayout
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65 | */
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66 | var $layout = null;
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67 |
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68 | /**
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69 | * @var string Appender name
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70 | */
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71 | var $name;
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72 |
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73 | /**
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74 | * The last filter in the filter chain
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75 | * @var LoggerFilter
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76 | */
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77 | var $tailFilter = null;
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78 |
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79 | /**
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80 | * @var LoggerLevel There is no level threshold filtering by default.
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81 | */
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82 | var $threshold = null;
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83 |
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84 | /**
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85 | * @var boolean needs a layout formatting ?
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86 | */
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87 | var $requiresLayout = false;
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88 |
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89 | /* --------------------------------------------------------------------------*/
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90 | /* --------------------------------------------------------------------------*/
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91 | /* --------------------------------------------------------------------------*/
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92 |
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93 | /**
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94 | * Constructor
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95 | *
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96 | * @param string $name appender name
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97 | */
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98 | function LoggerAppenderSkeleton($name)
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99 | {
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100 | $this->name = $name;
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101 | $this->clearFilters();
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102 | }
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103 |
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104 | /**
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105 | * @param LoggerFilter $newFilter add a new LoggerFilter
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106 | * @see LoggerAppender::addFilter()
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107 | */
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108 | function addFilter($newFilter)
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109 | {
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110 | if($this->headFilter == null) {
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111 | $this->headFilter = $newFilter;
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112 | $this->tailFilter =& $this->headFilter;
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113 | } else {
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114 | $this->tailFilter->next = $newFilter;
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115 | $this->tailFilter =& $this->tailFilter->next;
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116 | }
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117 | }
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118 |
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119 | /**
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120 | * Derived appenders should override this method if option structure
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121 | * requires it.
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122 | */
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123 | function activateOptions()
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124 | {
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125 |
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126 | }
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127 |
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128 | /**
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129 | * Subclasses of {@link LoggerAppenderSkeleton} should implement
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130 | * this method to perform actual logging.
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131 | *
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132 | * @param LoggerLoggingEvent $event
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133 | * @see doAppend()
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134 | * @abstract
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135 | */
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136 | function append($event)
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137 | {
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138 | // override me
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139 | }
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140 |
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141 | /**
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142 | * @see LoggerAppender::clearFilters()
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143 | */
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144 | function clearFilters()
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145 | {
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146 | $this->headFilter = null;
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147 | $this->tailFilter = null;
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148 | }
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149 |
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150 | /**
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151 | * @see LoggerAppender::close()
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152 | */
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153 | function close()
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154 | {
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155 | //override me
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156 | }
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157 |
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158 | /**
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159 | * Finalize this appender by calling the derived class' <i>close()</i> method.
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160 | */
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161 | function finalize()
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162 | {
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163 | // An appender might be closed then garbage collected. There is no
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164 | // point in closing twice.
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165 | if ($this->closed) return;
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166 |
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167 | LoggerLog::debug("LoggerAppenderSkeleton::finalize():name=[{$this->name}].");
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168 |
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169 | $this->close();
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170 | }
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171 |
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172 | /**
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173 | * Do not use this method.
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174 | * @see LoggerAppender::getErrorHandler()
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175 | * @return object
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176 | */
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177 | function &getErrorHandler()
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178 | {
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179 | return $this->errorHandler;
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180 | }
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181 |
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182 | /**
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183 | * @see LoggerAppender::getFilter()
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184 | * @return Filter
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185 | */
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186 | function &getFilter()
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187 | {
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188 | return $this->headFilter;
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189 | }
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190 |
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191 | /**
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192 | * Return the first filter in the filter chain for this Appender.
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193 | * The return value may be <i>null</i> if no is filter is set.
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194 | * @return Filter
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195 | */
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196 | function &getFirstFilter()
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197 | {
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198 | return $this->headFilter;
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199 | }
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200 |
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201 | /**
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202 | * @see LoggerAppender::getLayout()
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203 | * @return LoggerLayout
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204 | */
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205 | function &getLayout()
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206 | {
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207 | return $this->layout;
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208 | }
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209 |
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210 | /**
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211 | * @see LoggerAppender::getName()
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212 | * @return string
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213 | */
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214 | function getName()
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215 | {
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216 | return $this->name;
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217 | }
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218 |
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219 | /**
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220 | * Returns this appenders threshold level.
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221 | * See the {@link setThreshold()} method for the meaning of this option.
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222 | * @return LoggerLevel
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223 | */
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224 | function &getThreshold()
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225 | {
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226 | return $this->threshold;
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227 | }
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228 |
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229 | /**
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230 | * Check whether the message level is below the appender's threshold.
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231 | *
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232 | * If there is no threshold set, then the return value is always <i>true</i>.
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233 | * @param LoggerLevel $priority
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234 | * @return boolean
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235 | */
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236 | function isAsSevereAsThreshold($priority)
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237 | {
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238 | if ($this->threshold === null)
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239 | return true;
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240 |
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241 | return $priority->isGreaterOrEqual($this->getThreshold());
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242 | }
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243 |
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244 | /**
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245 | * @see LoggerAppender::doAppend()
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246 | * @param LoggerLoggingEvent $event
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247 | */
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248 | function doAppend($event)
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249 | {
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250 | LoggerLog::debug("LoggerAppenderSkeleton::doAppend()");
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251 |
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252 | if ($this->closed) {
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253 | LoggerLog::debug("LoggerAppenderSkeleton::doAppend() Attempted to append to closed appender named [{$this->name}].");
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254 | return;
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255 | }
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256 | if(!$this->isAsSevereAsThreshold($event->getLevel())) {
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257 | LoggerLog::debug("LoggerAppenderSkeleton::doAppend() event level is less severe than threshold.");
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258 | return;
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259 | }
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260 |
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261 | $f = $this->headFilter;
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262 |
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263 | while($f !== null) {
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264 | switch ($f->decide($event)) {
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265 | case LOG4PHP_LOGGER_FILTER_DENY: return;
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266 | case LOG4PHP_LOGGER_FILTER_ACCEPT: return $this->append($event);
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267 | case LOG4PHP_LOGGER_FILTER_NEUTRAL: $f = $f->next;
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268 | }
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269 | }
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270 | $this->append($event);
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271 | }
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272 |
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273 |
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274 | /**
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275 | * @see LoggerAppender::requiresLayout()
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276 | * @return boolean
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277 | */
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278 | function requiresLayout()
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279 | {
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280 | return $this->requiresLayout;
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281 | }
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282 |
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283 | /**
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284 | * @see LoggerAppender::setErrorHandler()
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285 | * @param object
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286 | */
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287 | function setErrorHandler($errorHandler)
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288 | {
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289 | if($errorHandler == null) {
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290 | // We do not throw exception here since the cause is probably a
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291 | // bad config file.
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292 | LoggerLog::warn("You have tried to set a null error-handler.");
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293 | } else {
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294 | $this->errorHandler = $errorHandler;
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295 | }
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296 | }
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297 |
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298 | /**
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299 | * @see LoggerAppender::setLayout()
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300 | * @param LoggerLayout $layout
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301 | */
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302 | function setLayout($layout)
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303 | {
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304 | if ($this->requiresLayout())
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305 | $this->layout = $layout;
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306 | }
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307 |
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308 | /**
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309 | * @see LoggerAppender::setName()
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310 | * @param string $name
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311 | */
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312 | function setName($name)
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313 | {
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314 | $this->name = $name;
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315 | }
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316 |
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317 | /**
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318 | * Set the threshold level of this appender.
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319 | *
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320 | * @param mixed $threshold can be a {@link LoggerLevel} object or a string.
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321 | * @see LoggerOptionConverter::toLevel()
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322 | */
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323 | function setThreshold($threshold)
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324 | {
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325 | if (is_string($threshold)) {
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326 | $this->threshold = LoggerOptionConverter::toLevel($threshold, null);
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327 | }elseif (is_a($threshold, 'loggerlevel')) {
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328 | $this->threshold = $threshold;
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329 | }
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330 | }
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331 |
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332 | /**
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333 | * Perform actions before object serialization.
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334 | *
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335 | * Call {@link finalize()} to properly close the appender.
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336 | */
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337 | function __sleep()
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338 | {
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339 | $this->finalize();
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340 | return array_keys(get_object_vars($this));
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341 | }
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342 |
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343 | /**
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344 | * Perform actions after object deserialization.
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345 | *
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346 | * Call {@link activateOptions()} to properly setup the appender.
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347 | */
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348 | function __wakeup()
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349 | {
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350 | $this->activateOptions();
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351 | }
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352 |
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353 | }
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354 | ?> |
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