/lib/apache-log4j/site/xref-test/org/apache/log4j/MyPatternLayout.html

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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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  2. <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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  3. <head>
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  4. <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" />
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  5. <title>MyPatternLayout xref</title>
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  6. <link type="text/css" rel="stylesheet" href="../../../stylesheet.css" />
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  7. </head>
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  8. <body>
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  9. <pre>
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  10. 

  11. <a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
    12. 

  12. <a name="2" href="#2">2</a>   <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em>
    13. 

  13. <a name="3" href="#3">3</a>   <em class="jxr_comment"> * contributor license agreements.  See the NOTICE file distributed with</em>
    14. 

  14. <a name="4" href="#4">4</a>   <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em>
    15. 

  15. <a name="5" href="#5">5</a>   <em class="jxr_comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</em>
    16. 

  16. <a name="6" href="#6">6</a>   <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em>
    17. 

  17. <a name="7" href="#7">7</a>   <em class="jxr_comment"> * the License.  You may obtain a copy of the License at</em>
    18. 

  18. <a name="8" href="#8">8</a>   <em class="jxr_comment"> * </em>
    19. 

  19. <a name="9" href="#9">9</a>   <em class="jxr_comment"> *      <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
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  20. <a name="10" href="#10">10</a>  <em class="jxr_comment"> * </em>
    21. 

  21. <a name="11" href="#11">11</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
    22. 

  22. <a name="12" href="#12">12</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
    23. 

  23. <a name="13" href="#13">13</a>  <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
    24. 

  24. <a name="14" href="#14">14</a>  <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
    25. 

  25. <a name="15" href="#15">15</a>  <em class="jxr_comment"> * limitations under the License.</em>
    26. 

  26. <a name="16" href="#16">16</a>  <em class="jxr_comment"> */</em>
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  27. <a name="17" href="#17">17</a>  
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  28. <a name="18" href="#18">18</a>  <strong class="jxr_keyword">package</strong> org.apache.log4j;
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  29. <a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.apache.log4j.helpers.PatternParser;
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  30. <a name="20" href="#20">20</a>  
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  31. <a name="21" href="#21">21</a>  <em class="jxr_javadoccomment">/**</em>
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  32. <a name="22" href="#22">22</a>  
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  33. <a name="23" href="#23">23</a>  <em class="jxr_javadoccomment">  Example showing how to extend PatternLayout to recognize additional</em>
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  34. <a name="24" href="#24">24</a>  <em class="jxr_javadoccomment">  conversion characters.  </em>
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  35. <a name="25" href="#25">25</a>  <em class="jxr_javadoccomment">  </em>
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  36. <a name="26" href="#26">26</a>  <em class="jxr_javadoccomment">  &lt;p&gt;In this case MyPatternLayout recognizes %# conversion pattern. It</em>
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  37. <a name="27" href="#27">27</a>  <em class="jxr_javadoccomment">  outputs the value of an internal counter which is also incremented</em>
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  38. <a name="28" href="#28">28</a>  <em class="jxr_javadoccomment">  at each call.</em>
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  39. <a name="29" href="#29">29</a>  
    40. 

  40. <a name="30" href="#30">30</a>  <em class="jxr_javadoccomment">  &lt;p&gt;See &lt;a href=doc-files/MyPatternLayout.java&gt;&lt;b&gt;source&lt;/b&gt;&lt;/a&gt; code</em>
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  41. <a name="31" href="#31">31</a>  <em class="jxr_javadoccomment">  for more details.</em>
    42. 

  42. <a name="32" href="#32">32</a>  
    43. 

  43. <a name="33" href="#33">33</a>  <em class="jxr_javadoccomment">  @see MyPatternParser</em>
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  44. <a name="34" href="#34">34</a>  <em class="jxr_javadoccomment">  @see org.apache.log4j.PatternLayout</em>
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  45. <a name="35" href="#35">35</a>  <em class="jxr_javadoccomment">  @author Anders Kristensen </em>
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  46. <a name="36" href="#36">36</a>  <em class="jxr_javadoccomment">*/</em>
    47. 

  47. <a name="37" href="#37">37</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../org/apache/log4j/MyPatternLayout.html">MyPatternLayout</a> <strong class="jxr_keyword">extends</strong> PatternLayout {
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  48. <a name="38" href="#38">38</a>    <strong class="jxr_keyword">public</strong>
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  49. <a name="39" href="#39">39</a>    <a href="../../../org/apache/log4j/MyPatternLayout.html">MyPatternLayout</a>() {
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  50. <a name="40" href="#40">40</a>      <strong class="jxr_keyword">this</strong>(DEFAULT_CONVERSION_PATTERN);
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  51. <a name="41" href="#41">41</a>    }
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  52. <a name="42" href="#42">42</a>  
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  53. <a name="43" href="#43">43</a>    <strong class="jxr_keyword">public</strong>
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  54. <a name="44" href="#44">44</a>    <a href="../../../org/apache/log4j/MyPatternLayout.html">MyPatternLayout</a>(String pattern) {
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  55. <a name="45" href="#45">45</a>      <strong class="jxr_keyword">super</strong>(pattern);
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  56. <a name="46" href="#46">46</a>    }
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  57. <a name="47" href="#47">47</a>      
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  58. <a name="48" href="#48">48</a>    <strong class="jxr_keyword">public</strong>
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  59. <a name="49" href="#49">49</a>    PatternParser createPatternParser(String pattern) {
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  60. <a name="50" href="#50">50</a>      <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../org/apache/log4j/MyPatternParser.html">MyPatternParser</a>(
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  61. <a name="51" href="#51">51</a>        pattern == <strong class="jxr_keyword">null</strong> ? DEFAULT_CONVERSION_PATTERN : pattern);
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  62. <a name="52" href="#52">52</a>    }
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  63. <a name="53" href="#53">53</a>    
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  64. <a name="54" href="#54">54</a>    <strong class="jxr_keyword">public</strong>
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  65. <a name="55" href="#55">55</a>    <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> main(String[] args) {
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  66. <a name="56" href="#56">56</a>      Layout layout = <strong class="jxr_keyword">new</strong> <a href="../../../org/apache/log4j/MyPatternLayout.html">MyPatternLayout</a>(<span class="jxr_string">"[counter=%.10#] - %m%n"</span>);
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  67. <a name="57" href="#57">57</a>      Logger logger = Logger.getLogger(<span class="jxr_string">"some.cat"</span>);
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  68. <a name="58" href="#58">58</a>      logger.addAppender(<strong class="jxr_keyword">new</strong> ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT));
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  69. <a name="59" href="#59">59</a>      logger.debug(<span class="jxr_string">"Hello, log"</span>);
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  70. <a name="60" href="#60">60</a>      logger.info(<span class="jxr_string">"Hello again..."</span>);    
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  71. <a name="61" href="#61">61</a>    }
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  72. <a name="62" href="#62">62</a>  }
    73. 

  73. </pre>
    74. 

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