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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.http.conf;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.Writer;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import javax.servlet.ServletException;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import javax.servlet.http.HttpServlet;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import javax.servlet.http.HttpServletRequest;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import javax.servlet.http.HttpServletResponse;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.conf.Configuration;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.http.HttpServer;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span><a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span>/**<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * A servlet to print out the running configuration data.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> */<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>@InterfaceAudience.LimitedPrivate({"HBase"})<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>@InterfaceStability.Unstable<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>public class ConfServlet extends HttpServlet {<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private static final long serialVersionUID = 1L;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private static final String FORMAT_JSON = "json";<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private static final String FORMAT_XML = "xml";<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private static final String FORMAT_PARAM = "format";<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> /**<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * Return the Configuration of the daemon hosting this servlet.<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * This is populated when the HttpServer starts.<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> */<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private Configuration getConfFromContext() {<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> Configuration conf = (Configuration)getServletContext().getAttribute(<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> HttpServer.CONF_CONTEXT_ATTRIBUTE);<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> assert conf != null;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> return conf;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> @Override<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> public void doGet(HttpServletRequest request, HttpServletResponse response)<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> throws ServletException, IOException {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> if (!HttpServer.isInstrumentationAccessAllowed(getServletContext(),<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> request, response)) {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> return;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> }<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> String format = request.getParameter(FORMAT_PARAM);<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> if (null == format) {<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> format = FORMAT_XML;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> }<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> if (FORMAT_XML.equals(format)) {<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> response.setContentType("text/xml; charset=utf-8");<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> } else if (FORMAT_JSON.equals(format)) {<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> response.setContentType("application/json; charset=utf-8");<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> }<a name="line.74"></a> |
| <span class="sourceLineNo">075</span><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> Writer out = response.getWriter();<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> try {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> writeResponse(getConfFromContext(), out, format);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> } catch (BadFormatException bfe) {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> response.sendError(HttpServletResponse.SC_BAD_REQUEST, bfe.getMessage());<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> out.close();<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> }<a name="line.83"></a> |
| <span class="sourceLineNo">084</span><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> /**<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * Guts of the servlet - extracted for easy testing.<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> */<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> static void writeResponse(Configuration conf, Writer out, String format)<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> throws IOException, BadFormatException {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> if (FORMAT_JSON.equals(format)) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> Configuration.dumpConfiguration(conf, out);<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> } else if (FORMAT_XML.equals(format)) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> conf.writeXml(out);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> } else {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> throw new BadFormatException("Bad format: " + format);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span><a name="line.98"></a> |
| <span class="sourceLineNo">099</span> public static class BadFormatException extends Exception {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> private static final long serialVersionUID = 1L;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> public BadFormatException(String msg) {<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> super(msg);<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span>}<a name="line.106"></a> |
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| </pre> |
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