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  10. <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em>
  11. <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em>
  12. <a name="3" href="#3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em>
  13. <a name="4" href="#4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em>
  14. <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>
  15. <a name="6" href="#6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em>
  16. <a name="7" href="#7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em>
  17. <a name="8" href="#8">8</a> <em class="jxr_comment"> * </em>
  18. <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>
  19. <a name="10" href="#10">10</a> <em class="jxr_comment"> * </em>
  20. <a name="11" href="#11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
  21. <a name="12" href="#12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
  22. <a name="13" href="#13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
  23. <a name="14" href="#14">14</a> <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
  24. <a name="15" href="#15">15</a> <em class="jxr_comment"> * limitations under the License.</em>
  25. <a name="16" href="#16">16</a> <em class="jxr_comment"> */</em>
  26. <a name="17" href="#17">17</a>
  27. <a name="18" href="#18">18</a> <strong class="jxr_keyword">package</strong> org.apache.log4j.helpers;
  28. <a name="19" href="#19">19</a>
  29. <a name="20" href="#20">20</a>
  30. <a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> java.io.Writer;
  31. <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.net.DatagramSocket;
  32. <a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.net.InetAddress;
  33. <a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.net.DatagramPacket;
  34. <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.net.UnknownHostException;
  35. <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.net.SocketException;
  36. <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.io.IOException;
  37. <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.net.URL;
  38. <a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.net.MalformedURLException;
  39. <a name="30" href="#30">30</a>
  40. <a name="31" href="#31">31</a> <em class="jxr_javadoccomment">/**</em>
  41. <a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> SyslogWriter is a wrapper around the java.net.DatagramSocket class</em>
  42. <a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> so that it behaves like a java.io.Writer.</em>
  43. <a name="34" href="#34">34</a>
  44. <a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> @since 0.7.3</em>
  45. <a name="36" href="#36">36</a> <em class="jxr_javadoccomment">*/</em>
  46. <a name="37" href="#37">37</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/log4j/helpers/SyslogWriter.html">SyslogWriter</a> <strong class="jxr_keyword">extends</strong> Writer {
  47. <a name="38" href="#38">38</a>
  48. <a name="39" href="#39">39</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SYSLOG_PORT = 514;
  49. <a name="40" href="#40">40</a> <em class="jxr_javadoccomment">/**</em>
  50. <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * Host string from last constructed SyslogWriter.</em>
  51. <a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * @deprecated</em>
  52. <a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> */</em>
  53. <a name="44" href="#44">44</a> <strong class="jxr_keyword">static</strong> String syslogHost;
  54. <a name="45" href="#45">45</a>
  55. <a name="46" href="#46">46</a> <strong class="jxr_keyword">private</strong> InetAddress address;
  56. <a name="47" href="#47">47</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> port;
  57. <a name="48" href="#48">48</a> <strong class="jxr_keyword">private</strong> DatagramSocket ds;
  58. <a name="49" href="#49">49</a>
  59. <a name="50" href="#50">50</a> <em class="jxr_javadoccomment">/**</em>
  60. <a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> * Constructs a new instance of SyslogWriter.</em>
  61. <a name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * @param syslogHost host name, may not be null. A port</em>
  62. <a name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * may be specified by following the name or IPv4 literal address with</em>
  63. <a name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * a colon and a decimal port number. To specify a port with an IPv6</em>
  64. <a name="55" href="#55">55</a> <em class="jxr_javadoccomment"> * address, enclose the IPv6 address in square brackets before appending</em>
  65. <a name="56" href="#56">56</a> <em class="jxr_javadoccomment"> * the colon and decimal port number.</em>
  66. <a name="57" href="#57">57</a> <em class="jxr_javadoccomment"> */</em>
  67. <a name="58" href="#58">58</a> <strong class="jxr_keyword">public</strong>
  68. <a name="59" href="#59">59</a> <a href="../../../../org/apache/log4j/helpers/SyslogWriter.html">SyslogWriter</a>(<strong class="jxr_keyword">final</strong> String syslogHost) {
  69. <a name="60" href="#60">60</a> SyslogWriter.syslogHost = syslogHost;
  70. <a name="61" href="#61">61</a> <strong class="jxr_keyword">if</strong> (syslogHost == <strong class="jxr_keyword">null</strong>) {
  71. <a name="62" href="#62">62</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"syslogHost"</span>);
  72. <a name="63" href="#63">63</a> }
  73. <a name="64" href="#64">64</a>
  74. <a name="65" href="#65">65</a> String host = syslogHost;
  75. <a name="66" href="#66">66</a> <strong class="jxr_keyword">int</strong> urlPort = -1;
  76. <a name="67" href="#67">67</a>
  77. <a name="68" href="#68">68</a> <em class="jxr_comment">//</em>
  78. <a name="69" href="#69">69</a> <em class="jxr_comment">// If not an unbracketed IPv6 address then</em>
  79. <a name="70" href="#70">70</a> <em class="jxr_comment">// parse as a URL</em>
  80. <a name="71" href="#71">71</a> <em class="jxr_comment">//</em>
  81. <a name="72" href="#72">72</a> <strong class="jxr_keyword">if</strong> (host.indexOf(<span class="jxr_string">"["</span>) != -1 || host.indexOf(':') == host.lastIndexOf(':')) {
  82. <a name="73" href="#73">73</a> <strong class="jxr_keyword">try</strong> {
  83. <a name="74" href="#74">74</a> URL url = <strong class="jxr_keyword">new</strong> URL(<span class="jxr_string">"http://"</span> + host);
  84. <a name="75" href="#75">75</a> <strong class="jxr_keyword">if</strong> (url.getHost() != <strong class="jxr_keyword">null</strong>) {
  85. <a name="76" href="#76">76</a> host = url.getHost();
  86. <a name="77" href="#77">77</a> <em class="jxr_comment">// if host is a IPv6 literal, strip off the brackets</em>
  87. <a name="78" href="#78">78</a> <strong class="jxr_keyword">if</strong>(host.startsWith(<span class="jxr_string">"["</span>) &amp;&amp; host.charAt(host.length() - 1) == ']') {
  88. <a name="79" href="#79">79</a> host = host.substring(1, host.length() - 1);
  89. <a name="80" href="#80">80</a> }
  90. <a name="81" href="#81">81</a> urlPort = url.getPort();
  91. <a name="82" href="#82">82</a> }
  92. <a name="83" href="#83">83</a> } <strong class="jxr_keyword">catch</strong>(MalformedURLException e) {
  93. <a name="84" href="#84">84</a> LogLog.error(<span class="jxr_string">"Malformed URL: will attempt to interpret as InetAddress."</span>, e);
  94. <a name="85" href="#85">85</a> }
  95. <a name="86" href="#86">86</a> }
  96. <a name="87" href="#87">87</a>
  97. <a name="88" href="#88">88</a> <strong class="jxr_keyword">if</strong> (urlPort == -1) {
  98. <a name="89" href="#89">89</a> urlPort = SYSLOG_PORT;
  99. <a name="90" href="#90">90</a> }
  100. <a name="91" href="#91">91</a> port = urlPort;
  101. <a name="92" href="#92">92</a>
  102. <a name="93" href="#93">93</a> <strong class="jxr_keyword">try</strong> {
  103. <a name="94" href="#94">94</a> <strong class="jxr_keyword">this</strong>.address = InetAddress.getByName(host);
  104. <a name="95" href="#95">95</a> }
  105. <a name="96" href="#96">96</a> <strong class="jxr_keyword">catch</strong> (UnknownHostException e) {
  106. <a name="97" href="#97">97</a> LogLog.error(<span class="jxr_string">"Could not find "</span> + host +
  107. <a name="98" href="#98">98</a> <span class="jxr_string">". All logging will FAIL."</span>, e);
  108. <a name="99" href="#99">99</a> }
  109. <a name="100" href="#100">100</a>
  110. <a name="101" href="#101">101</a> <strong class="jxr_keyword">try</strong> {
  111. <a name="102" href="#102">102</a> <strong class="jxr_keyword">this</strong>.ds = <strong class="jxr_keyword">new</strong> DatagramSocket();
  112. <a name="103" href="#103">103</a> }
  113. <a name="104" href="#104">104</a> <strong class="jxr_keyword">catch</strong> (SocketException e) {
  114. <a name="105" href="#105">105</a> e.printStackTrace();
  115. <a name="106" href="#106">106</a> LogLog.error(<span class="jxr_string">"Could not instantiate DatagramSocket to "</span> + host +
  116. <a name="107" href="#107">107</a> <span class="jxr_string">". All logging will FAIL."</span>, e);
  117. <a name="108" href="#108">108</a> }
  118. <a name="109" href="#109">109</a>
  119. <a name="110" href="#110">110</a> }
  120. <a name="111" href="#111">111</a>
  121. <a name="112" href="#112">112</a>
  122. <a name="113" href="#113">113</a> <strong class="jxr_keyword">public</strong>
  123. <a name="114" href="#114">114</a> <strong class="jxr_keyword">void</strong> write(<strong class="jxr_keyword">char</strong>[] buf, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len) <strong class="jxr_keyword">throws</strong> IOException {
  124. <a name="115" href="#115">115</a> <strong class="jxr_keyword">this</strong>.write(<strong class="jxr_keyword">new</strong> String(buf, off, len));
  125. <a name="116" href="#116">116</a> }
  126. <a name="117" href="#117">117</a>
  127. <a name="118" href="#118">118</a> <strong class="jxr_keyword">public</strong>
  128. <a name="119" href="#119">119</a> <strong class="jxr_keyword">void</strong> write(<strong class="jxr_keyword">final</strong> String string) <strong class="jxr_keyword">throws</strong> IOException {
  129. <a name="120" href="#120">120</a>
  130. <a name="121" href="#121">121</a> <strong class="jxr_keyword">if</strong>(<strong class="jxr_keyword">this</strong>.ds != <strong class="jxr_keyword">null</strong> &amp;&amp; <strong class="jxr_keyword">this</strong>.address != <strong class="jxr_keyword">null</strong>) {
  131. <a name="122" href="#122">122</a> byte[] bytes = string.getBytes();
  132. <a name="123" href="#123">123</a> <em class="jxr_comment">//</em>
  133. <a name="124" href="#124">124</a> <em class="jxr_comment">// syslog packets must be less than 1024 bytes</em>
  134. <a name="125" href="#125">125</a> <em class="jxr_comment">//</em>
  135. <a name="126" href="#126">126</a> <strong class="jxr_keyword">int</strong> bytesLength = bytes.length;
  136. <a name="127" href="#127">127</a> <strong class="jxr_keyword">if</strong> (bytesLength &gt;= 1024) {
  137. <a name="128" href="#128">128</a> bytesLength = 1024;
  138. <a name="129" href="#129">129</a> }
  139. <a name="130" href="#130">130</a> DatagramPacket packet = <strong class="jxr_keyword">new</strong> DatagramPacket(bytes, bytesLength,
  140. <a name="131" href="#131">131</a> address, port);
  141. <a name="132" href="#132">132</a> ds.send(packet);
  142. <a name="133" href="#133">133</a> }
  143. <a name="134" href="#134">134</a>
  144. <a name="135" href="#135">135</a> }
  145. <a name="136" href="#136">136</a>
  146. <a name="137" href="#137">137</a> <strong class="jxr_keyword">public</strong>
  147. <a name="138" href="#138">138</a> <strong class="jxr_keyword">void</strong> flush() {}
  148. <a name="139" href="#139">139</a>
  149. <a name="140" href="#140">140</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() {
  150. <a name="141" href="#141">141</a> <strong class="jxr_keyword">if</strong> (ds != <strong class="jxr_keyword">null</strong>) {
  151. <a name="142" href="#142">142</a> ds.close();
  152. <a name="143" href="#143">143</a> }
  153. <a name="144" href="#144">144</a> }
  154. <a name="145" href="#145">145</a> }
  155. </pre>
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