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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<FONT color="green">003</FONT>     * or more contributor license agreements.  See the NOTICE file<a name="line.3"></a>
<FONT color="green">004</FONT>     * distributed with this work for additional information<a name="line.4"></a>
<FONT color="green">005</FONT>     * regarding copyright ownership.  The ASF licenses this file<a name="line.5"></a>
<FONT color="green">006</FONT>     * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<FONT color="green">007</FONT>     * "License"); you may not use this file except in compliance<a name="line.7"></a>
<FONT color="green">008</FONT>     * with the License.  You may obtain a copy of the License at<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<FONT color="green">013</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<FONT color="green">014</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<FONT color="green">015</FONT>     * See the License for the specific language governing permissions and<a name="line.15"></a>
<FONT color="green">016</FONT>     * limitations under the License.<a name="line.16"></a>
<FONT color="green">017</FONT>     */<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    package org.apache.hadoop.lib.servlet;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    import org.apache.hadoop.conf.Configuration;<a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.hadoop.lib.server.Server;<a name="line.22"></a>
<FONT color="green">023</FONT>    import org.apache.hadoop.lib.server.ServerException;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    import javax.servlet.ServletContextEvent;<a name="line.25"></a>
<FONT color="green">026</FONT>    import javax.servlet.ServletContextListener;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.text.MessageFormat;<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>    /**<a name="line.29"></a>
<FONT color="green">030</FONT>     * {@link Server} subclass that implements &lt;code&gt;ServletContextListener&lt;/code&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     * and uses its lifecycle to start and stop the server.<a name="line.31"></a>
<FONT color="green">032</FONT>     */<a name="line.32"></a>
<FONT color="green">033</FONT>    public abstract class ServerWebApp extends Server implements ServletContextListener {<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>      private static final String HOME_DIR = ".home.dir";<a name="line.35"></a>
<FONT color="green">036</FONT>      private static final String CONFIG_DIR = ".config.dir";<a name="line.36"></a>
<FONT color="green">037</FONT>      private static final String LOG_DIR = ".log.dir";<a name="line.37"></a>
<FONT color="green">038</FONT>      private static final String TEMP_DIR = ".temp.dir";<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>      private static ThreadLocal&lt;String&gt; HOME_DIR_TL = new ThreadLocal&lt;String&gt;();<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>      /**<a name="line.42"></a>
<FONT color="green">043</FONT>       * Method for testing purposes.<a name="line.43"></a>
<FONT color="green">044</FONT>       */<a name="line.44"></a>
<FONT color="green">045</FONT>      public static void setHomeDirForCurrentThread(String homeDir) {<a name="line.45"></a>
<FONT color="green">046</FONT>        HOME_DIR_TL.set(homeDir);<a name="line.46"></a>
<FONT color="green">047</FONT>      }<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>      /**<a name="line.49"></a>
<FONT color="green">050</FONT>       * Constructor for testing purposes.<a name="line.50"></a>
<FONT color="green">051</FONT>       */<a name="line.51"></a>
<FONT color="green">052</FONT>      protected ServerWebApp(String name, String homeDir, String configDir, String logDir, String tempDir,<a name="line.52"></a>
<FONT color="green">053</FONT>                             Configuration config) {<a name="line.53"></a>
<FONT color="green">054</FONT>        super(name, homeDir, configDir, logDir, tempDir, config);<a name="line.54"></a>
<FONT color="green">055</FONT>      }<a name="line.55"></a>
<FONT color="green">056</FONT>    <a name="line.56"></a>
<FONT color="green">057</FONT>      /**<a name="line.57"></a>
<FONT color="green">058</FONT>       * Constructor for testing purposes.<a name="line.58"></a>
<FONT color="green">059</FONT>       */<a name="line.59"></a>
<FONT color="green">060</FONT>      protected ServerWebApp(String name, String homeDir, Configuration config) {<a name="line.60"></a>
<FONT color="green">061</FONT>        super(name, homeDir, config);<a name="line.61"></a>
<FONT color="green">062</FONT>      }<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>      /**<a name="line.64"></a>
<FONT color="green">065</FONT>       * Constructor. Subclasses must have a default constructor specifying<a name="line.65"></a>
<FONT color="green">066</FONT>       * the server name.<a name="line.66"></a>
<FONT color="green">067</FONT>       * &lt;p/&gt;<a name="line.67"></a>
<FONT color="green">068</FONT>       * The server name is used to resolve the Java System properties that define<a name="line.68"></a>
<FONT color="green">069</FONT>       * the server home, config, log and temp directories.<a name="line.69"></a>
<FONT color="green">070</FONT>       * &lt;p/&gt;<a name="line.70"></a>
<FONT color="green">071</FONT>       * The home directory is looked in the Java System property<a name="line.71"></a>
<FONT color="green">072</FONT>       * &lt;code&gt;#SERVER_NAME#.home.dir&lt;/code&gt;.<a name="line.72"></a>
<FONT color="green">073</FONT>       * &lt;p/&gt;<a name="line.73"></a>
<FONT color="green">074</FONT>       * The config directory is looked in the Java System property<a name="line.74"></a>
<FONT color="green">075</FONT>       * &lt;code&gt;#SERVER_NAME#.config.dir&lt;/code&gt;, if not defined it resolves to<a name="line.75"></a>
<FONT color="green">076</FONT>       * the &lt;code&gt;#SERVER_HOME_DIR#/conf&lt;/code&gt; directory.<a name="line.76"></a>
<FONT color="green">077</FONT>       * &lt;p/&gt;<a name="line.77"></a>
<FONT color="green">078</FONT>       * The log directory is looked in the Java System property<a name="line.78"></a>
<FONT color="green">079</FONT>       * &lt;code&gt;#SERVER_NAME#.log.dir&lt;/code&gt;, if not defined it resolves to<a name="line.79"></a>
<FONT color="green">080</FONT>       * the &lt;code&gt;#SERVER_HOME_DIR#/log&lt;/code&gt; directory.<a name="line.80"></a>
<FONT color="green">081</FONT>       * &lt;p/&gt;<a name="line.81"></a>
<FONT color="green">082</FONT>       * The temp directory is looked in the Java System property<a name="line.82"></a>
<FONT color="green">083</FONT>       * &lt;code&gt;#SERVER_NAME#.temp.dir&lt;/code&gt;, if not defined it resolves to<a name="line.83"></a>
<FONT color="green">084</FONT>       * the &lt;code&gt;#SERVER_HOME_DIR#/temp&lt;/code&gt; directory.<a name="line.84"></a>
<FONT color="green">085</FONT>       *<a name="line.85"></a>
<FONT color="green">086</FONT>       * @param name server name.<a name="line.86"></a>
<FONT color="green">087</FONT>       */<a name="line.87"></a>
<FONT color="green">088</FONT>      public ServerWebApp(String name) {<a name="line.88"></a>
<FONT color="green">089</FONT>        super(name, getHomeDir(name),<a name="line.89"></a>
<FONT color="green">090</FONT>              getDir(name, CONFIG_DIR, getHomeDir(name) + "/conf"),<a name="line.90"></a>
<FONT color="green">091</FONT>              getDir(name, LOG_DIR, getHomeDir(name) + "/log"),<a name="line.91"></a>
<FONT color="green">092</FONT>              getDir(name, TEMP_DIR, getHomeDir(name) + "/temp"), null);<a name="line.92"></a>
<FONT color="green">093</FONT>      }<a name="line.93"></a>
<FONT color="green">094</FONT>    <a name="line.94"></a>
<FONT color="green">095</FONT>      /**<a name="line.95"></a>
<FONT color="green">096</FONT>       * Returns the server home directory.<a name="line.96"></a>
<FONT color="green">097</FONT>       * &lt;p/&gt;<a name="line.97"></a>
<FONT color="green">098</FONT>       * It is looked up in the Java System property<a name="line.98"></a>
<FONT color="green">099</FONT>       * &lt;code&gt;#SERVER_NAME#.home.dir&lt;/code&gt;.<a name="line.99"></a>
<FONT color="green">100</FONT>       *<a name="line.100"></a>
<FONT color="green">101</FONT>       * @param name the server home directory.<a name="line.101"></a>
<FONT color="green">102</FONT>       *<a name="line.102"></a>
<FONT color="green">103</FONT>       * @return the server home directory.<a name="line.103"></a>
<FONT color="green">104</FONT>       */<a name="line.104"></a>
<FONT color="green">105</FONT>      static String getHomeDir(String name) {<a name="line.105"></a>
<FONT color="green">106</FONT>        String homeDir = HOME_DIR_TL.get();<a name="line.106"></a>
<FONT color="green">107</FONT>        if (homeDir == null) {<a name="line.107"></a>
<FONT color="green">108</FONT>          String sysProp = name + HOME_DIR;<a name="line.108"></a>
<FONT color="green">109</FONT>          homeDir = System.getProperty(sysProp);<a name="line.109"></a>
<FONT color="green">110</FONT>          if (homeDir == null) {<a name="line.110"></a>
<FONT color="green">111</FONT>            throw new IllegalArgumentException(MessageFormat.format("System property [{0}] not defined", sysProp));<a name="line.111"></a>
<FONT color="green">112</FONT>          }<a name="line.112"></a>
<FONT color="green">113</FONT>        }<a name="line.113"></a>
<FONT color="green">114</FONT>        return homeDir;<a name="line.114"></a>
<FONT color="green">115</FONT>      }<a name="line.115"></a>
<FONT color="green">116</FONT>    <a name="line.116"></a>
<FONT color="green">117</FONT>      /**<a name="line.117"></a>
<FONT color="green">118</FONT>       * Convenience method that looks for Java System property defining a<a name="line.118"></a>
<FONT color="green">119</FONT>       * diretory and if not present defaults to the specified directory.<a name="line.119"></a>
<FONT color="green">120</FONT>       *<a name="line.120"></a>
<FONT color="green">121</FONT>       * @param name server name, used as prefix of the Java System property.<a name="line.121"></a>
<FONT color="green">122</FONT>       * @param dirType dir type, use as postfix of the Java System property.<a name="line.122"></a>
<FONT color="green">123</FONT>       * @param defaultDir the default directory to return if the Java System<a name="line.123"></a>
<FONT color="green">124</FONT>       * property &lt;code&gt;name + dirType&lt;/code&gt; is not defined.<a name="line.124"></a>
<FONT color="green">125</FONT>       *<a name="line.125"></a>
<FONT color="green">126</FONT>       * @return the directory defined in the Java System property or the<a name="line.126"></a>
<FONT color="green">127</FONT>       *         the default directory if the Java System property is not defined.<a name="line.127"></a>
<FONT color="green">128</FONT>       */<a name="line.128"></a>
<FONT color="green">129</FONT>      static String getDir(String name, String dirType, String defaultDir) {<a name="line.129"></a>
<FONT color="green">130</FONT>        String sysProp = name + dirType;<a name="line.130"></a>
<FONT color="green">131</FONT>        return System.getProperty(sysProp, defaultDir);<a name="line.131"></a>
<FONT color="green">132</FONT>      }<a name="line.132"></a>
<FONT color="green">133</FONT>    <a name="line.133"></a>
<FONT color="green">134</FONT>      /**<a name="line.134"></a>
<FONT color="green">135</FONT>       * Initializes the &lt;code&gt;ServletContextListener&lt;/code&gt; which initializes<a name="line.135"></a>
<FONT color="green">136</FONT>       * the Server.<a name="line.136"></a>
<FONT color="green">137</FONT>       *<a name="line.137"></a>
<FONT color="green">138</FONT>       * @param event servelt context event.<a name="line.138"></a>
<FONT color="green">139</FONT>       */<a name="line.139"></a>
<FONT color="green">140</FONT>      public void contextInitialized(ServletContextEvent event) {<a name="line.140"></a>
<FONT color="green">141</FONT>        try {<a name="line.141"></a>
<FONT color="green">142</FONT>          init();<a name="line.142"></a>
<FONT color="green">143</FONT>        } catch (ServerException ex) {<a name="line.143"></a>
<FONT color="green">144</FONT>          event.getServletContext().log("ERROR: " + ex.getMessage());<a name="line.144"></a>
<FONT color="green">145</FONT>          throw new RuntimeException(ex);<a name="line.145"></a>
<FONT color="green">146</FONT>        }<a name="line.146"></a>
<FONT color="green">147</FONT>      }<a name="line.147"></a>
<FONT color="green">148</FONT>    <a name="line.148"></a>
<FONT color="green">149</FONT>      /**<a name="line.149"></a>
<FONT color="green">150</FONT>       * Destroys the &lt;code&gt;ServletContextListener&lt;/code&gt; which destroys<a name="line.150"></a>
<FONT color="green">151</FONT>       * the Server.<a name="line.151"></a>
<FONT color="green">152</FONT>       *<a name="line.152"></a>
<FONT color="green">153</FONT>       * @param event servelt context event.<a name="line.153"></a>
<FONT color="green">154</FONT>       */<a name="line.154"></a>
<FONT color="green">155</FONT>      public void contextDestroyed(ServletContextEvent event) {<a name="line.155"></a>
<FONT color="green">156</FONT>        destroy();<a name="line.156"></a>
<FONT color="green">157</FONT>      }<a name="line.157"></a>
<FONT color="green">158</FONT>    <a name="line.158"></a>
<FONT color="green">159</FONT>    }<a name="line.159"></a>




























































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