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| <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em> |
| <a name="3" href="#3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em> |
| <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> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * </em> |
| <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> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * </em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * See the License for the specific language governing permissions and</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * limitations under the License.</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> */</em> |
| <a name="17" href="#17">17</a> |
| <a name="18" href="#18">18</a> <strong class="jxr_keyword">package</strong> org.apache.log4j.net; |
| <a name="19" href="#19">19</a> |
| <a name="20" href="#20">20</a> <strong class="jxr_keyword">import</strong> org.apache.log4j.AppenderSkeleton; |
| <a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.apache.log4j.helpers.LogLog; |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.log4j.spi.LoggingEvent; |
| <a name="23" href="#23">23</a> |
| <a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.io.IOException; |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.io.PrintWriter; |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.io.InterruptedIOException; |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.net.ServerSocket; |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.net.Socket; |
| <a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.util.Enumeration; |
| <a name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> java.util.Iterator; |
| <a name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> java.util.Vector; |
| <a name="32" href="#32">32</a> |
| <a name="33" href="#33">33</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> <p>The TelnetAppender is a log4j appender that specializes in</em> |
| <a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> writing to a read-only socket. The output is provided in a</em> |
| <a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> telnet-friendly way so that a log can be monitored over TCP/IP.</em> |
| <a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> Clients using telnet connect to the socket and receive log data.</em> |
| <a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> This is handy for remote monitoring, especially when monitoring a</em> |
| <a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> servlet.</em> |
| <a name="40" href="#40">40</a> |
| <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> <p>Here is a list of the available configuration options:</em> |
| <a name="42" href="#42">42</a> |
| <a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> <table border=1></em> |
| <a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> <tr></em> |
| <a name="45" href="#45">45</a> <em class="jxr_javadoccomment"> <th>Name</th></em> |
| <a name="46" href="#46">46</a> <em class="jxr_javadoccomment"> <th>Requirement</th></em> |
| <a name="47" href="#47">47</a> <em class="jxr_javadoccomment"> <th>Description</th></em> |
| <a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> <th>Sample Value</th></em> |
| <a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> </tr></em> |
| <a name="50" href="#50">50</a> |
| <a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> <tr></em> |
| <a name="52" href="#52">52</a> <em class="jxr_javadoccomment"> <td>Port</td></em> |
| <a name="53" href="#53">53</a> <em class="jxr_javadoccomment"> <td>optional</td></em> |
| <a name="54" href="#54">54</a> <em class="jxr_javadoccomment"> <td>This parameter determines the port to use for announcing log events. The default port is 23 (telnet).</td></em> |
| <a name="55" href="#55">55</a> <em class="jxr_javadoccomment"> <td>5875</td></em> |
| <a name="56" href="#56">56</a> <em class="jxr_javadoccomment"> </table></em> |
| <a name="57" href="#57">57</a> |
| <a name="58" href="#58">58</a> <em class="jxr_javadoccomment"> @author <a HREF="<a href="mailto:jay@v-wave.com" target="alexandria_uri">mailto:jay@v-wave.com</a>">Jay Funnell</a></em> |
| <a name="59" href="#59">59</a> <em class="jxr_javadoccomment">*/</em> |
| <a name="60" href="#60">60</a> |
| <a name="61" href="#61">61</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/log4j/net/TelnetAppender.html">TelnetAppender</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../org/apache/log4j/AppenderSkeleton.html">AppenderSkeleton</a> { |
| <a name="62" href="#62">62</a> |
| <a name="63" href="#63">63</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/apache/log4j/net/TelnetAppender.html">SocketHandler</a> sh; |
| <a name="64" href="#64">64</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> port = 23; |
| <a name="65" href="#65">65</a> |
| <a name="66" href="#66">66</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em> |
| <a name="67" href="#67">67</a> <em class="jxr_javadoccomment"> This appender requires a layout to format the text to the</em> |
| <a name="68" href="#68">68</a> <em class="jxr_javadoccomment"> attached client(s). */</em> |
| <a name="69" href="#69">69</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> requiresLayout() { |
| <a name="70" href="#70">70</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>; |
| <a name="71" href="#71">71</a> } |
| <a name="72" href="#72">72</a> |
| <a name="73" href="#73">73</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> all of the options have been set, create the socket handler and</em> |
| <a name="74" href="#74">74</a> <em class="jxr_javadoccomment"> wait for connections. */</em> |
| <a name="75" href="#75">75</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> activateOptions() { |
| <a name="76" href="#76">76</a> <strong class="jxr_keyword">try</strong> { |
| <a name="77" href="#77">77</a> sh = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/log4j/net/TelnetAppender.html">SocketHandler</a>(port); |
| <a name="78" href="#78">78</a> sh.start(); |
| <a name="79" href="#79">79</a> } |
| <a name="80" href="#80">80</a> <strong class="jxr_keyword">catch</strong>(InterruptedIOException e) { |
| <a name="81" href="#81">81</a> Thread.currentThread().interrupt(); |
| <a name="82" href="#82">82</a> e.printStackTrace(); |
| <a name="83" href="#83">83</a> } <strong class="jxr_keyword">catch</strong>(IOException e) { |
| <a name="84" href="#84">84</a> e.printStackTrace(); |
| <a name="85" href="#85">85</a> } <strong class="jxr_keyword">catch</strong>(RuntimeException e) { |
| <a name="86" href="#86">86</a> e.printStackTrace(); |
| <a name="87" href="#87">87</a> } |
| <a name="88" href="#88">88</a> <strong class="jxr_keyword">super</strong>.activateOptions(); |
| <a name="89" href="#89">89</a> } |
| <a name="90" href="#90">90</a> |
| <a name="91" href="#91">91</a> <strong class="jxr_keyword">public</strong> |
| <a name="92" href="#92">92</a> <strong class="jxr_keyword">int</strong> getPort() { |
| <a name="93" href="#93">93</a> <strong class="jxr_keyword">return</strong> port; |
| <a name="94" href="#94">94</a> } |
| <a name="95" href="#95">95</a> |
| <a name="96" href="#96">96</a> <strong class="jxr_keyword">public</strong> |
| <a name="97" href="#97">97</a> <strong class="jxr_keyword">void</strong> setPort(<strong class="jxr_keyword">int</strong> port) { |
| <a name="98" href="#98">98</a> <strong class="jxr_keyword">this</strong>.port = port; |
| <a name="99" href="#99">99</a> } |
| <a name="100" href="#100">100</a> |
| <a name="101" href="#101">101</a> |
| <a name="102" href="#102">102</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> shuts down the appender. */</em> |
| <a name="103" href="#103">103</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() { |
| <a name="104" href="#104">104</a> <strong class="jxr_keyword">if</strong> (sh != <strong class="jxr_keyword">null</strong>) { |
| <a name="105" href="#105">105</a> sh.close(); |
| <a name="106" href="#106">106</a> <strong class="jxr_keyword">try</strong> { |
| <a name="107" href="#107">107</a> sh.join(); |
| <a name="108" href="#108">108</a> } <strong class="jxr_keyword">catch</strong>(InterruptedException ex) { |
| <a name="109" href="#109">109</a> Thread.currentThread().interrupt(); |
| <a name="110" href="#110">110</a> } |
| <a name="111" href="#111">111</a> } |
| <a name="112" href="#112">112</a> } |
| <a name="113" href="#113">113</a> |
| <a name="114" href="#114">114</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Handles a log event. For this appender, that means writing the</em> |
| <a name="115" href="#115">115</a> <em class="jxr_javadoccomment"> message to each connected client. */</em> |
| <a name="116" href="#116">116</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> append(<a href="../../../../org/apache/log4j/spi/LoggingEvent.html">LoggingEvent</a> event) { |
| <a name="117" href="#117">117</a> <strong class="jxr_keyword">if</strong>(sh != <strong class="jxr_keyword">null</strong>) { |
| <a name="118" href="#118">118</a> sh.send(layout.format(event)); |
| <a name="119" href="#119">119</a> <strong class="jxr_keyword">if</strong>(layout.ignoresThrowable()) { |
| <a name="120" href="#120">120</a> String[] s = event.getThrowableStrRep(); |
| <a name="121" href="#121">121</a> <strong class="jxr_keyword">if</strong> (s != <strong class="jxr_keyword">null</strong>) { |
| <a name="122" href="#122">122</a> StringBuffer buf = <strong class="jxr_keyword">new</strong> StringBuffer(); |
| <a name="123" href="#123">123</a> <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = 0; i < s.length; i++) { |
| <a name="124" href="#124">124</a> buf.append(s[i]); |
| <a name="125" href="#125">125</a> buf.append(<span class="jxr_string">"\r\n"</span>); |
| <a name="126" href="#126">126</a> } |
| <a name="127" href="#127">127</a> sh.send(buf.toString()); |
| <a name="128" href="#128">128</a> } |
| <a name="129" href="#129">129</a> } |
| <a name="130" href="#130">130</a> } |
| <a name="131" href="#131">131</a> } |
| <a name="132" href="#132">132</a> |
| <a name="133" href="#133">133</a> <em class="jxr_comment">//---------------------------------------------------------- SocketHandler:</em> |
| <a name="134" href="#134">134</a> |
| <a name="135" href="#135">135</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The SocketHandler class is used to accept connections from</em> |
| <a name="136" href="#136">136</a> <em class="jxr_javadoccomment"> clients. It is threaded so that clients can connect/disconnect</em> |
| <a name="137" href="#137">137</a> <em class="jxr_javadoccomment"> asynchronously. */</em> |
| <a name="138" href="#138">138</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/log4j/net/TelnetAppender.html">SocketHandler</a> <strong class="jxr_keyword">extends</strong> Thread { |
| <a name="139" href="#139">139</a> |
| <a name="140" href="#140">140</a> <strong class="jxr_keyword">private</strong> Vector writers = <strong class="jxr_keyword">new</strong> Vector(); |
| <a name="141" href="#141">141</a> <strong class="jxr_keyword">private</strong> Vector connections = <strong class="jxr_keyword">new</strong> Vector(); |
| <a name="142" href="#142">142</a> <strong class="jxr_keyword">private</strong> ServerSocket serverSocket; |
| <a name="143" href="#143">143</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> MAX_CONNECTIONS = 20; |
| <a name="144" href="#144">144</a> |
| <a name="145" href="#145">145</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> finalize() { |
| <a name="146" href="#146">146</a> close(); |
| <a name="147" href="#147">147</a> } |
| <a name="148" href="#148">148</a> |
| <a name="149" href="#149">149</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em> |
| <a name="150" href="#150">150</a> <em class="jxr_javadoccomment"> * make sure we close all network connections when this handler is destroyed.</em> |
| <a name="151" href="#151">151</a> <em class="jxr_javadoccomment"> * @since 1.2.15 </em> |
| <a name="152" href="#152">152</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="153" href="#153">153</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() { |
| <a name="154" href="#154">154</a> <strong class="jxr_keyword">synchronized</strong>(<strong class="jxr_keyword">this</strong>) { |
| <a name="155" href="#155">155</a> <strong class="jxr_keyword">for</strong>(Enumeration e = connections.elements();e.hasMoreElements();) { |
| <a name="156" href="#156">156</a> <strong class="jxr_keyword">try</strong> { |
| <a name="157" href="#157">157</a> ((Socket)e.nextElement()).close(); |
| <a name="158" href="#158">158</a> } <strong class="jxr_keyword">catch</strong>(InterruptedIOException ex) { |
| <a name="159" href="#159">159</a> Thread.currentThread().interrupt(); |
| <a name="160" href="#160">160</a> } <strong class="jxr_keyword">catch</strong>(IOException ex) { |
| <a name="161" href="#161">161</a> } <strong class="jxr_keyword">catch</strong>(RuntimeException ex) { |
| <a name="162" href="#162">162</a> } |
| <a name="163" href="#163">163</a> } |
| <a name="164" href="#164">164</a> } |
| <a name="165" href="#165">165</a> |
| <a name="166" href="#166">166</a> <strong class="jxr_keyword">try</strong> { |
| <a name="167" href="#167">167</a> serverSocket.close(); |
| <a name="168" href="#168">168</a> } <strong class="jxr_keyword">catch</strong>(InterruptedIOException ex) { |
| <a name="169" href="#169">169</a> Thread.currentThread().interrupt(); |
| <a name="170" href="#170">170</a> } <strong class="jxr_keyword">catch</strong>(IOException ex) { |
| <a name="171" href="#171">171</a> } <strong class="jxr_keyword">catch</strong>(RuntimeException ex) { |
| <a name="172" href="#172">172</a> } |
| <a name="173" href="#173">173</a> } |
| <a name="174" href="#174">174</a> |
| <a name="175" href="#175">175</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> sends a message to each of the clients in telnet-friendly output. */</em> |
| <a name="176" href="#176">176</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> send(<strong class="jxr_keyword">final</strong> String message) { |
| <a name="177" href="#177">177</a> Iterator ce = connections.iterator(); |
| <a name="178" href="#178">178</a> <strong class="jxr_keyword">for</strong>(Iterator e = writers.iterator();e.hasNext();) { |
| <a name="179" href="#179">179</a> ce.next(); |
| <a name="180" href="#180">180</a> PrintWriter writer = (PrintWriter)e.next(); |
| <a name="181" href="#181">181</a> writer.print(message); |
| <a name="182" href="#182">182</a> <strong class="jxr_keyword">if</strong>(writer.checkError()) { |
| <a name="183" href="#183">183</a> ce.remove(); |
| <a name="184" href="#184">184</a> e.remove(); |
| <a name="185" href="#185">185</a> } |
| <a name="186" href="#186">186</a> } |
| <a name="187" href="#187">187</a> } |
| <a name="188" href="#188">188</a> |
| <a name="189" href="#189">189</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em> |
| <a name="190" href="#190">190</a> <em class="jxr_javadoccomment"> Continually accepts client connections. Client connections</em> |
| <a name="191" href="#191">191</a> <em class="jxr_javadoccomment"> are refused when MAX_CONNECTIONS is reached. </em> |
| <a name="192" href="#192">192</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="193" href="#193">193</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() { |
| <a name="194" href="#194">194</a> <strong class="jxr_keyword">while</strong>(!serverSocket.isClosed()) { |
| <a name="195" href="#195">195</a> <strong class="jxr_keyword">try</strong> { |
| <a name="196" href="#196">196</a> Socket newClient = serverSocket.accept(); |
| <a name="197" href="#197">197</a> PrintWriter pw = <strong class="jxr_keyword">new</strong> PrintWriter(newClient.getOutputStream()); |
| <a name="198" href="#198">198</a> <strong class="jxr_keyword">if</strong>(connections.size() < MAX_CONNECTIONS) { |
| <a name="199" href="#199">199</a> <strong class="jxr_keyword">synchronized</strong>(<strong class="jxr_keyword">this</strong>) { |
| <a name="200" href="#200">200</a> connections.addElement(newClient); |
| <a name="201" href="#201">201</a> writers.addElement(pw); |
| <a name="202" href="#202">202</a> pw.print(<span class="jxr_string">"TelnetAppender v1.0 ("</span> + connections.size() |
| <a name="203" href="#203">203</a> + <span class="jxr_string">" active connections)\r\n\r\n"</span>); |
| <a name="204" href="#204">204</a> pw.flush(); |
| <a name="205" href="#205">205</a> } |
| <a name="206" href="#206">206</a> } <strong class="jxr_keyword">else</strong> { |
| <a name="207" href="#207">207</a> pw.print(<span class="jxr_string">"Too many connections.\r\n"</span>); |
| <a name="208" href="#208">208</a> pw.flush(); |
| <a name="209" href="#209">209</a> newClient.close(); |
| <a name="210" href="#210">210</a> } |
| <a name="211" href="#211">211</a> } <strong class="jxr_keyword">catch</strong>(Exception e) { |
| <a name="212" href="#212">212</a> <strong class="jxr_keyword">if</strong> (e instanceof InterruptedIOException || e instanceof InterruptedException) { |
| <a name="213" href="#213">213</a> Thread.currentThread().interrupt(); |
| <a name="214" href="#214">214</a> } |
| <a name="215" href="#215">215</a> <strong class="jxr_keyword">if</strong> (!serverSocket.isClosed()) { |
| <a name="216" href="#216">216</a> LogLog.error(<span class="jxr_string">"Encountered error while in SocketHandler loop."</span>, e); |
| <a name="217" href="#217">217</a> } |
| <a name="218" href="#218">218</a> <strong class="jxr_keyword">break</strong>; |
| <a name="219" href="#219">219</a> } |
| <a name="220" href="#220">220</a> } |
| <a name="221" href="#221">221</a> |
| <a name="222" href="#222">222</a> <strong class="jxr_keyword">try</strong> { |
| <a name="223" href="#223">223</a> serverSocket.close(); |
| <a name="224" href="#224">224</a> } <strong class="jxr_keyword">catch</strong>(InterruptedIOException ex) { |
| <a name="225" href="#225">225</a> Thread.currentThread().interrupt(); |
| <a name="226" href="#226">226</a> } <strong class="jxr_keyword">catch</strong>(IOException ex) { |
| <a name="227" href="#227">227</a> } |
| <a name="228" href="#228">228</a> } |
| <a name="229" href="#229">229</a> |
| <a name="230" href="#230">230</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/log4j/net/TelnetAppender.html">SocketHandler</a>(<strong class="jxr_keyword">int</strong> port) <strong class="jxr_keyword">throws</strong> IOException { |
| <a name="231" href="#231">231</a> serverSocket = <strong class="jxr_keyword">new</strong> ServerSocket(port); |
| <a name="232" href="#232">232</a> setName(<span class="jxr_string">"TelnetAppender-"</span> + getName() + <span class="jxr_string">"-"</span> + port); |
| <a name="233" href="#233">233</a> } |
| <a name="234" href="#234">234</a> |
| <a name="235" href="#235">235</a> } |
| <a name="236" href="#236">236</a> } |
| </pre> |
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