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Posted to commits@hbase.apache.org by gi...@apache.org on 2017/06/14 15:00:04 UTC
[13/20] hbase-site git commit: Published site at
82d554e3783372cc6b05489452c815b57c06f6cd.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/aa46da47/devapidocs/src-html/org/apache/hadoop/hbase/client/example/HttpProxyExample.RequestHandler.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/example/HttpProxyExample.RequestHandler.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/example/HttpProxyExample.RequestHandler.html
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.client.example;<a name="line.18"></a>
+<span class="sourceLineNo">019</span><a name="line.19"></a>
+<span class="sourceLineNo">020</span>import com.google.common.base.Preconditions;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import com.google.common.base.Throwables;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import io.netty.bootstrap.ServerBootstrap;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import io.netty.buffer.ByteBuf;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import io.netty.channel.Channel;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import io.netty.channel.ChannelHandlerContext;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import io.netty.channel.ChannelInitializer;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import io.netty.channel.ChannelOption;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import io.netty.channel.EventLoopGroup;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import io.netty.channel.SimpleChannelInboundHandler;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import io.netty.channel.group.ChannelGroup;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import io.netty.channel.group.DefaultChannelGroup;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import io.netty.channel.nio.NioEventLoopGroup;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import io.netty.channel.socket.nio.NioServerSocketChannel;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import io.netty.channel.socket.nio.NioSocketChannel;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import io.netty.handler.codec.http.DefaultFullHttpResponse;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import io.netty.handler.codec.http.FullHttpRequest;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import io.netty.handler.codec.http.HttpHeaderNames;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import io.netty.handler.codec.http.HttpObjectAggregator;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import io.netty.handler.codec.http.HttpResponseStatus;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import io.netty.handler.codec.http.HttpServerCodec;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import io.netty.handler.codec.http.HttpVersion;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import io.netty.handler.codec.http.QueryStringDecoder;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import io.netty.util.concurrent.GlobalEventExecutor;<a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>import java.io.IOException;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import java.net.InetSocketAddress;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import java.nio.charset.StandardCharsets;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import java.util.Optional;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import java.util.concurrent.ExecutionException;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.conf.Configuration;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.TableName;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.client.AsyncConnection;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.client.Get;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.client.Put;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.client.RawAsyncTable;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.ipc.NettyRpcClientConfigHelper;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>/**<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * A simple example on how to use {@link RawAsyncTable} to write a fully asynchronous HTTP proxy<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * server. The {@link AsyncConnection} will share the same event loop with the HTTP server.<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * <p><a name="line.66"></a>
+<span class="sourceLineNo">067</span> * The request URL is:<a name="line.67"></a>
+<span class="sourceLineNo">068</span> *<a name="line.68"></a>
+<span class="sourceLineNo">069</span> * <pre><a name="line.69"></a>
+<span class="sourceLineNo">070</span> * http://&lt;host&gt;:&lt;port&gt;/&lt;table&gt;/&lt;rowgt;/&lt;family&gt;:&lt;qualifier&gt;<a name="line.70"></a>
+<span class="sourceLineNo">071</span> * </pre><a name="line.71"></a>
+<span class="sourceLineNo">072</span> *<a name="line.72"></a>
+<span class="sourceLineNo">073</span> * Use HTTP GET to fetch data, and use HTTP PUT to put data. Encode the value as the request content<a name="line.73"></a>
+<span class="sourceLineNo">074</span> * when doing PUT.<a name="line.74"></a>
+<span class="sourceLineNo">075</span> */<a name="line.75"></a>
+<span class="sourceLineNo">076</span>public class HttpProxyExample {<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> private final EventLoopGroup bossGroup = new NioEventLoopGroup(1);<a name="line.78"></a>
+<span class="sourceLineNo">079</span><a name="line.79"></a>
+<span class="sourceLineNo">080</span> private final EventLoopGroup workerGroup = new NioEventLoopGroup();<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> private final Configuration conf;<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span> private final int port;<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span> private AsyncConnection conn;<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> private Channel serverChannel;<a name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span> private ChannelGroup channelGroup;<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span> public HttpProxyExample(Configuration conf, int port) {<a name="line.92"></a>
+<span class="sourceLineNo">093</span> this.conf = conf;<a name="line.93"></a>
+<span class="sourceLineNo">094</span> this.port = port;<a name="line.94"></a>
+<span class="sourceLineNo">095</span> }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span> private static final class Params {<a name="line.97"></a>
+<span class="sourceLineNo">098</span> public final String table;<a name="line.98"></a>
+<span class="sourceLineNo">099</span><a name="line.99"></a>
+<span class="sourceLineNo">100</span> public final String row;<a name="line.100"></a>
+<span class="sourceLineNo">101</span><a name="line.101"></a>
+<span class="sourceLineNo">102</span> public final String family;<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span> public final String qualifier;<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span> public Params(String table, String row, String family, String qualifier) {<a name="line.106"></a>
+<span class="sourceLineNo">107</span> this.table = table;<a name="line.107"></a>
+<span class="sourceLineNo">108</span> this.row = row;<a name="line.108"></a>
+<span class="sourceLineNo">109</span> this.family = family;<a name="line.109"></a>
+<span class="sourceLineNo">110</span> this.qualifier = qualifier;<a name="line.110"></a>
+<span class="sourceLineNo">111</span> }<a name="line.111"></a>
+<span class="sourceLineNo">112</span> }<a name="line.112"></a>
+<span class="sourceLineNo">113</span><a name="line.113"></a>
+<span class="sourceLineNo">114</span> private static final class RequestHandler extends SimpleChannelInboundHandler<FullHttpRequest> {<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span> private final AsyncConnection conn;<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> private final ChannelGroup channelGroup;<a name="line.118"></a>
+<span class="sourceLineNo">119</span><a name="line.119"></a>
+<span class="sourceLineNo">120</span> public RequestHandler(AsyncConnection conn, ChannelGroup channelGroup) {<a name="line.120"></a>
+<span class="sourceLineNo">121</span> this.conn = conn;<a name="line.121"></a>
+<span class="sourceLineNo">122</span> this.channelGroup = channelGroup;<a name="line.122"></a>
+<span class="sourceLineNo">123</span> }<a name="line.123"></a>
+<span class="sourceLineNo">124</span><a name="line.124"></a>
+<span class="sourceLineNo">125</span> @Override<a name="line.125"></a>
+<span class="sourceLineNo">126</span> public void channelActive(ChannelHandlerContext ctx) {<a name="line.126"></a>
+<span class="sourceLineNo">127</span> channelGroup.add(ctx.channel());<a name="line.127"></a>
+<span class="sourceLineNo">128</span> ctx.fireChannelActive();<a name="line.128"></a>
+<span class="sourceLineNo">129</span> }<a name="line.129"></a>
+<span class="sourceLineNo">130</span><a name="line.130"></a>
+<span class="sourceLineNo">131</span> @Override<a name="line.131"></a>
+<span class="sourceLineNo">132</span> public void channelInactive(ChannelHandlerContext ctx) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> channelGroup.remove(ctx.channel());<a name="line.133"></a>
+<span class="sourceLineNo">134</span> ctx.fireChannelInactive();<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span><a name="line.136"></a>
+<span class="sourceLineNo">137</span> private void write(ChannelHandlerContext ctx, HttpResponseStatus status,<a name="line.137"></a>
+<span class="sourceLineNo">138</span> Optional<String> content) {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> DefaultFullHttpResponse resp;<a name="line.139"></a>
+<span class="sourceLineNo">140</span> if (content.isPresent()) {<a name="line.140"></a>
+<span class="sourceLineNo">141</span> ByteBuf buf =<a name="line.141"></a>
+<span class="sourceLineNo">142</span> ctx.alloc().buffer().writeBytes(content.get().getBytes(StandardCharsets.UTF_8));<a name="line.142"></a>
+<span class="sourceLineNo">143</span> resp = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status, buf);<a name="line.143"></a>
+<span class="sourceLineNo">144</span> resp.headers().set(HttpHeaderNames.CONTENT_LENGTH, buf.readableBytes());<a name="line.144"></a>
+<span class="sourceLineNo">145</span> } else {<a name="line.145"></a>
+<span class="sourceLineNo">146</span> resp = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status);<a name="line.146"></a>
+<span class="sourceLineNo">147</span> }<a name="line.147"></a>
+<span class="sourceLineNo">148</span> resp.headers().set(HttpHeaderNames.CONTENT_TYPE, "text-plain; charset=UTF-8");<a name="line.148"></a>
+<span class="sourceLineNo">149</span> ctx.writeAndFlush(resp);<a name="line.149"></a>
+<span class="sourceLineNo">150</span> }<a name="line.150"></a>
+<span class="sourceLineNo">151</span><a name="line.151"></a>
+<span class="sourceLineNo">152</span> private Params parse(FullHttpRequest req) {<a name="line.152"></a>
+<span class="sourceLineNo">153</span> String[] components = new QueryStringDecoder(req.uri()).path().split("/");<a name="line.153"></a>
+<span class="sourceLineNo">154</span> Preconditions.checkArgument(components.length == 4, "Unrecognized uri: %s", req.uri());<a name="line.154"></a>
+<span class="sourceLineNo">155</span> // path is start with '/' so split will give an empty component<a name="line.155"></a>
+<span class="sourceLineNo">156</span> String[] cfAndCq = components[3].split(":");<a name="line.156"></a>
+<span class="sourceLineNo">157</span> Preconditions.checkArgument(cfAndCq.length == 2, "Unrecognized uri: %s", req.uri());<a name="line.157"></a>
+<span class="sourceLineNo">158</span> return new Params(components[1], components[2], cfAndCq[0], cfAndCq[1]);<a name="line.158"></a>
+<span class="sourceLineNo">159</span> }<a name="line.159"></a>
+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span> private void get(ChannelHandlerContext ctx, FullHttpRequest req) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> Params params = parse(req);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> conn.getRawTable(TableName.valueOf(params.table)).get(new Get(Bytes.toBytes(params.row))<a name="line.163"></a>
+<span class="sourceLineNo">164</span> .addColumn(Bytes.toBytes(params.family), Bytes.toBytes(params.qualifier)))<a name="line.164"></a>
+<span class="sourceLineNo">165</span> .whenComplete((r, e) -> {<a name="line.165"></a>
+<span class="sourceLineNo">166</span> if (e != null) {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> exceptionCaught(ctx, e);<a name="line.167"></a>
+<span class="sourceLineNo">168</span> } else {<a name="line.168"></a>
+<span class="sourceLineNo">169</span> byte[] value =<a name="line.169"></a>
+<span class="sourceLineNo">170</span> r.getValue(Bytes.toBytes(params.family), Bytes.toBytes(params.qualifier));<a name="line.170"></a>
+<span class="sourceLineNo">171</span> if (value != null) {<a name="line.171"></a>
+<span class="sourceLineNo">172</span> write(ctx, HttpResponseStatus.OK, Optional.of(Bytes.toStringBinary(value)));<a name="line.172"></a>
+<span class="sourceLineNo">173</span> } else {<a name="line.173"></a>
+<span class="sourceLineNo">174</span> write(ctx, HttpResponseStatus.NOT_FOUND, Optional.empty());<a name="line.174"></a>
+<span class="sourceLineNo">175</span> }<a name="line.175"></a>
+<span class="sourceLineNo">176</span> }<a name="line.176"></a>
+<span class="sourceLineNo">177</span> });<a name="line.177"></a>
+<span class="sourceLineNo">178</span> }<a name="line.178"></a>
+<span class="sourceLineNo">179</span><a name="line.179"></a>
+<span class="sourceLineNo">180</span> private void put(ChannelHandlerContext ctx, FullHttpRequest req) {<a name="line.180"></a>
+<span class="sourceLineNo">181</span> Params params = parse(req);<a name="line.181"></a>
+<span class="sourceLineNo">182</span> byte[] value = new byte[req.content().readableBytes()];<a name="line.182"></a>
+<span class="sourceLineNo">183</span> req.content().readBytes(value);<a name="line.183"></a>
+<span class="sourceLineNo">184</span> conn.getRawTable(TableName.valueOf(params.table)).put(new Put(Bytes.toBytes(params.row))<a name="line.184"></a>
+<span class="sourceLineNo">185</span> .addColumn(Bytes.toBytes(params.family), Bytes.toBytes(params.qualifier), value))<a name="line.185"></a>
+<span class="sourceLineNo">186</span> .whenComplete((r, e) -> {<a name="line.186"></a>
+<span class="sourceLineNo">187</span> if (e != null) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span> exceptionCaught(ctx, e);<a name="line.188"></a>
+<span class="sourceLineNo">189</span> } else {<a name="line.189"></a>
+<span class="sourceLineNo">190</span> write(ctx, HttpResponseStatus.OK, Optional.empty());<a name="line.190"></a>
+<span class="sourceLineNo">191</span> }<a name="line.191"></a>
+<span class="sourceLineNo">192</span> });<a name="line.192"></a>
+<span class="sourceLineNo">193</span> }<a name="line.193"></a>
+<span class="sourceLineNo">194</span><a name="line.194"></a>
+<span class="sourceLineNo">195</span> @Override<a name="line.195"></a>
+<span class="sourceLineNo">196</span> protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) {<a name="line.196"></a>
+<span class="sourceLineNo">197</span> switch (req.method().name()) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> case "GET":<a name="line.198"></a>
+<span class="sourceLineNo">199</span> get(ctx, req);<a name="line.199"></a>
+<span class="sourceLineNo">200</span> break;<a name="line.200"></a>
+<span class="sourceLineNo">201</span> case "PUT":<a name="line.201"></a>
+<span class="sourceLineNo">202</span> put(ctx, req);<a name="line.202"></a>
+<span class="sourceLineNo">203</span> break;<a name="line.203"></a>
+<span class="sourceLineNo">204</span> default:<a name="line.204"></a>
+<span class="sourceLineNo">205</span> write(ctx, HttpResponseStatus.METHOD_NOT_ALLOWED, Optional.empty());<a name="line.205"></a>
+<span class="sourceLineNo">206</span> break;<a name="line.206"></a>
+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span> }<a name="line.208"></a>
+<span class="sourceLineNo">209</span><a name="line.209"></a>
+<span class="sourceLineNo">210</span> @Override<a name="line.210"></a>
+<span class="sourceLineNo">211</span> public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> if (cause instanceof IllegalArgumentException) {<a name="line.212"></a>
+<span class="sourceLineNo">213</span> write(ctx, HttpResponseStatus.BAD_REQUEST, Optional.of(cause.getMessage()));<a name="line.213"></a>
+<span class="sourceLineNo">214</span> } else {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> write(ctx, HttpResponseStatus.INTERNAL_SERVER_ERROR,<a name="line.215"></a>
+<span class="sourceLineNo">216</span> Optional.of(Throwables.getStackTraceAsString(cause)));<a name="line.216"></a>
+<span class="sourceLineNo">217</span> }<a name="line.217"></a>
+<span class="sourceLineNo">218</span> }<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span><a name="line.220"></a>
+<span class="sourceLineNo">221</span> public void start() throws InterruptedException, ExecutionException {<a name="line.221"></a>
+<span class="sourceLineNo">222</span> NettyRpcClientConfigHelper.setEventLoopConfig(conf, workerGroup, NioSocketChannel.class);<a name="line.222"></a>
+<span class="sourceLineNo">223</span> conn = ConnectionFactory.createAsyncConnection(conf).get();<a name="line.223"></a>
+<span class="sourceLineNo">224</span> channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);<a name="line.224"></a>
+<span class="sourceLineNo">225</span> serverChannel = new ServerBootstrap().group(bossGroup, workerGroup)<a name="line.225"></a>
+<span class="sourceLineNo">226</span> .channel(NioServerSocketChannel.class).childOption(ChannelOption.TCP_NODELAY, true)<a name="line.226"></a>
+<span class="sourceLineNo">227</span> .childHandler(new ChannelInitializer<Channel>() {<a name="line.227"></a>
+<span class="sourceLineNo">228</span><a name="line.228"></a>
+<span class="sourceLineNo">229</span> @Override<a name="line.229"></a>
+<span class="sourceLineNo">230</span> protected void initChannel(Channel ch) throws Exception {<a name="line.230"></a>
+<span class="sourceLineNo">231</span> ch.pipeline().addFirst(new HttpServerCodec(), new HttpObjectAggregator(4 * 1024 * 1024),<a name="line.231"></a>
+<span class="sourceLineNo">232</span> new RequestHandler(conn, channelGroup));<a name="line.232"></a>
+<span class="sourceLineNo">233</span> }<a name="line.233"></a>
+<span class="sourceLineNo">234</span> }).bind(port).syncUninterruptibly().channel();<a name="line.234"></a>
+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span><a name="line.236"></a>
+<span class="sourceLineNo">237</span> public void join() {<a name="line.237"></a>
+<span class="sourceLineNo">238</span> serverChannel.closeFuture().awaitUninterruptibly();<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
+<span class="sourceLineNo">240</span><a name="line.240"></a>
+<span class="sourceLineNo">241</span> public int port() {<a name="line.241"></a>
+<span class="sourceLineNo">242</span> if (serverChannel == null) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> return port;<a name="line.243"></a>
+<span class="sourceLineNo">244</span> } else {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> return ((InetSocketAddress) serverChannel.localAddress()).getPort();<a name="line.245"></a>
+<span class="sourceLineNo">246</span> }<a name="line.246"></a>
+<span class="sourceLineNo">247</span> }<a name="line.247"></a>
+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span> public void stop() throws IOException {<a name="line.249"></a>
+<span class="sourceLineNo">250</span> serverChannel.close().syncUninterruptibly();<a name="line.250"></a>
+<span class="sourceLineNo">251</span> serverChannel = null;<a name="line.251"></a>
+<span class="sourceLineNo">252</span> channelGroup.close().syncUninterruptibly();<a name="line.252"></a>
+<span class="sourceLineNo">253</span> channelGroup = null;<a name="line.253"></a>
+<span class="sourceLineNo">254</span> conn.close();<a name="line.254"></a>
+<span class="sourceLineNo">255</span> conn = null;<a name="line.255"></a>
+<span class="sourceLineNo">256</span> }<a name="line.256"></a>
+<span class="sourceLineNo">257</span><a name="line.257"></a>
+<span class="sourceLineNo">258</span> public static void main(String[] args) throws InterruptedException, ExecutionException {<a name="line.258"></a>
+<span class="sourceLineNo">259</span> int port = Integer.parseInt(args[0]);<a name="line.259"></a>
+<span class="sourceLineNo">260</span> HttpProxyExample proxy = new HttpProxyExample(HBaseConfiguration.create(), port);<a name="line.260"></a>
+<span class="sourceLineNo">261</span> proxy.start();<a name="line.261"></a>
+<span class="sourceLineNo">262</span> proxy.join();<a name="line.262"></a>
+<span class="sourceLineNo">263</span> }<a name="line.263"></a>
+<span class="sourceLineNo">264</span>}<a name="line.264"></a>
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+</div>
+</body>
+</html>
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.client.example;<a name="line.18"></a>
+<span class="sourceLineNo">019</span><a name="line.19"></a>
+<span class="sourceLineNo">020</span>import com.google.common.base.Preconditions;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import com.google.common.base.Throwables;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import io.netty.bootstrap.ServerBootstrap;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import io.netty.buffer.ByteBuf;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import io.netty.channel.Channel;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import io.netty.channel.ChannelHandlerContext;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import io.netty.channel.ChannelInitializer;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import io.netty.channel.ChannelOption;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import io.netty.channel.EventLoopGroup;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import io.netty.channel.SimpleChannelInboundHandler;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import io.netty.channel.group.ChannelGroup;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import io.netty.channel.group.DefaultChannelGroup;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import io.netty.channel.nio.NioEventLoopGroup;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import io.netty.channel.socket.nio.NioServerSocketChannel;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import io.netty.channel.socket.nio.NioSocketChannel;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import io.netty.handler.codec.http.DefaultFullHttpResponse;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import io.netty.handler.codec.http.FullHttpRequest;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import io.netty.handler.codec.http.HttpHeaderNames;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import io.netty.handler.codec.http.HttpObjectAggregator;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import io.netty.handler.codec.http.HttpResponseStatus;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import io.netty.handler.codec.http.HttpServerCodec;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import io.netty.handler.codec.http.HttpVersion;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import io.netty.handler.codec.http.QueryStringDecoder;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import io.netty.util.concurrent.GlobalEventExecutor;<a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span>import java.io.IOException;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import java.net.InetSocketAddress;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import java.nio.charset.StandardCharsets;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import java.util.Optional;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import java.util.concurrent.ExecutionException;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.conf.Configuration;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.TableName;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.client.AsyncConnection;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.client.Get;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.client.Put;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.client.RawAsyncTable;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.ipc.NettyRpcClientConfigHelper;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>/**<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * A simple example on how to use {@link RawAsyncTable} to write a fully asynchronous HTTP proxy<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * server. The {@link AsyncConnection} will share the same event loop with the HTTP server.<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * <p><a name="line.66"></a>
+<span class="sourceLineNo">067</span> * The request URL is:<a name="line.67"></a>
+<span class="sourceLineNo">068</span> *<a name="line.68"></a>
+<span class="sourceLineNo">069</span> * <pre><a name="line.69"></a>
+<span class="sourceLineNo">070</span> * http://&lt;host&gt;:&lt;port&gt;/&lt;table&gt;/&lt;rowgt;/&lt;family&gt;:&lt;qualifier&gt;<a name="line.70"></a>
+<span class="sourceLineNo">071</span> * </pre><a name="line.71"></a>
+<span class="sourceLineNo">072</span> *<a name="line.72"></a>
+<span class="sourceLineNo">073</span> * Use HTTP GET to fetch data, and use HTTP PUT to put data. Encode the value as the request content<a name="line.73"></a>
+<span class="sourceLineNo">074</span> * when doing PUT.<a name="line.74"></a>
+<span class="sourceLineNo">075</span> */<a name="line.75"></a>
+<span class="sourceLineNo">076</span>public class HttpProxyExample {<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> private final EventLoopGroup bossGroup = new NioEventLoopGroup(1);<a name="line.78"></a>
+<span class="sourceLineNo">079</span><a name="line.79"></a>
+<span class="sourceLineNo">080</span> private final EventLoopGroup workerGroup = new NioEventLoopGroup();<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> private final Configuration conf;<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span> private final int port;<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span> private AsyncConnection conn;<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> private Channel serverChannel;<a name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span> private ChannelGroup channelGroup;<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span> public HttpProxyExample(Configuration conf, int port) {<a name="line.92"></a>
+<span class="sourceLineNo">093</span> this.conf = conf;<a name="line.93"></a>
+<span class="sourceLineNo">094</span> this.port = port;<a name="line.94"></a>
+<span class="sourceLineNo">095</span> }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span> private static final class Params {<a name="line.97"></a>
+<span class="sourceLineNo">098</span> public final String table;<a name="line.98"></a>
+<span class="sourceLineNo">099</span><a name="line.99"></a>
+<span class="sourceLineNo">100</span> public final String row;<a name="line.100"></a>
+<span class="sourceLineNo">101</span><a name="line.101"></a>
+<span class="sourceLineNo">102</span> public final String family;<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span> public final String qualifier;<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span> public Params(String table, String row, String family, String qualifier) {<a name="line.106"></a>
+<span class="sourceLineNo">107</span> this.table = table;<a name="line.107"></a>
+<span class="sourceLineNo">108</span> this.row = row;<a name="line.108"></a>
+<span class="sourceLineNo">109</span> this.family = family;<a name="line.109"></a>
+<span class="sourceLineNo">110</span> this.qualifier = qualifier;<a name="line.110"></a>
+<span class="sourceLineNo">111</span> }<a name="line.111"></a>
+<span class="sourceLineNo">112</span> }<a name="line.112"></a>
+<span class="sourceLineNo">113</span><a name="line.113"></a>
+<span class="sourceLineNo">114</span> private static final class RequestHandler extends SimpleChannelInboundHandler<FullHttpRequest> {<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span> private final AsyncConnection conn;<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> private final ChannelGroup channelGroup;<a name="line.118"></a>
+<span class="sourceLineNo">119</span><a name="line.119"></a>
+<span class="sourceLineNo">120</span> public RequestHandler(AsyncConnection conn, ChannelGroup channelGroup) {<a name="line.120"></a>
+<span class="sourceLineNo">121</span> this.conn = conn;<a name="line.121"></a>
+<span class="sourceLineNo">122</span> this.channelGroup = channelGroup;<a name="line.122"></a>
+<span class="sourceLineNo">123</span> }<a name="line.123"></a>
+<span class="sourceLineNo">124</span><a name="line.124"></a>
+<span class="sourceLineNo">125</span> @Override<a name="line.125"></a>
+<span class="sourceLineNo">126</span> public void channelActive(ChannelHandlerContext ctx) {<a name="line.126"></a>
+<span class="sourceLineNo">127</span> channelGroup.add(ctx.channel());<a name="line.127"></a>
+<span class="sourceLineNo">128</span> ctx.fireChannelActive();<a name="line.128"></a>
+<span class="sourceLineNo">129</span> }<a name="line.129"></a>
+<span class="sourceLineNo">130</span><a name="line.130"></a>
+<span class="sourceLineNo">131</span> @Override<a name="line.131"></a>
+<span class="sourceLineNo">132</span> public void channelInactive(ChannelHandlerContext ctx) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> channelGroup.remove(ctx.channel());<a name="line.133"></a>
+<span class="sourceLineNo">134</span> ctx.fireChannelInactive();<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span><a name="line.136"></a>
+<span class="sourceLineNo">137</span> private void write(ChannelHandlerContext ctx, HttpResponseStatus status,<a name="line.137"></a>
+<span class="sourceLineNo">138</span> Optional<String> content) {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> DefaultFullHttpResponse resp;<a name="line.139"></a>
+<span class="sourceLineNo">140</span> if (content.isPresent()) {<a name="line.140"></a>
+<span class="sourceLineNo">141</span> ByteBuf buf =<a name="line.141"></a>
+<span class="sourceLineNo">142</span> ctx.alloc().buffer().writeBytes(content.get().getBytes(StandardCharsets.UTF_8));<a name="line.142"></a>
+<span class="sourceLineNo">143</span> resp = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status, buf);<a name="line.143"></a>
+<span class="sourceLineNo">144</span> resp.headers().set(HttpHeaderNames.CONTENT_LENGTH, buf.readableBytes());<a name="line.144"></a>
+<span class="sourceLineNo">145</span> } else {<a name="line.145"></a>
+<span class="sourceLineNo">146</span> resp = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status);<a name="line.146"></a>
+<span class="sourceLineNo">147</span> }<a name="line.147"></a>
+<span class="sourceLineNo">148</span> resp.headers().set(HttpHeaderNames.CONTENT_TYPE, "text-plain; charset=UTF-8");<a name="line.148"></a>
+<span class="sourceLineNo">149</span> ctx.writeAndFlush(resp);<a name="line.149"></a>
+<span class="sourceLineNo">150</span> }<a name="line.150"></a>
+<span class="sourceLineNo">151</span><a name="line.151"></a>
+<span class="sourceLineNo">152</span> private Params parse(FullHttpRequest req) {<a name="line.152"></a>
+<span class="sourceLineNo">153</span> String[] components = new QueryStringDecoder(req.uri()).path().split("/");<a name="line.153"></a>
+<span class="sourceLineNo">154</span> Preconditions.checkArgument(components.length == 4, "Unrecognized uri: %s", req.uri());<a name="line.154"></a>
+<span class="sourceLineNo">155</span> // path is start with '/' so split will give an empty component<a name="line.155"></a>
+<span class="sourceLineNo">156</span> String[] cfAndCq = components[3].split(":");<a name="line.156"></a>
+<span class="sourceLineNo">157</span> Preconditions.checkArgument(cfAndCq.length == 2, "Unrecognized uri: %s", req.uri());<a name="line.157"></a>
+<span class="sourceLineNo">158</span> return new Params(components[1], components[2], cfAndCq[0], cfAndCq[1]);<a name="line.158"></a>
+<span class="sourceLineNo">159</span> }<a name="line.159"></a>
+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span> private void get(ChannelHandlerContext ctx, FullHttpRequest req) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> Params params = parse(req);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> conn.getRawTable(TableName.valueOf(params.table)).get(new Get(Bytes.toBytes(params.row))<a name="line.163"></a>
+<span class="sourceLineNo">164</span> .addColumn(Bytes.toBytes(params.family), Bytes.toBytes(params.qualifier)))<a name="line.164"></a>
+<span class="sourceLineNo">165</span> .whenComplete((r, e) -> {<a name="line.165"></a>
+<span class="sourceLineNo">166</span> if (e != null) {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> exceptionCaught(ctx, e);<a name="line.167"></a>
+<span class="sourceLineNo">168</span> } else {<a name="line.168"></a>
+<span class="sourceLineNo">169</span> byte[] value =<a name="line.169"></a>
+<span class="sourceLineNo">170</span> r.getValue(Bytes.toBytes(params.family), Bytes.toBytes(params.qualifier));<a name="line.170"></a>
+<span class="sourceLineNo">171</span> if (value != null) {<a name="line.171"></a>
+<span class="sourceLineNo">172</span> write(ctx, HttpResponseStatus.OK, Optional.of(Bytes.toStringBinary(value)));<a name="line.172"></a>
+<span class="sourceLineNo">173</span> } else {<a name="line.173"></a>
+<span class="sourceLineNo">174</span> write(ctx, HttpResponseStatus.NOT_FOUND, Optional.empty());<a name="line.174"></a>
+<span class="sourceLineNo">175</span> }<a name="line.175"></a>
+<span class="sourceLineNo">176</span> }<a name="line.176"></a>
+<span class="sourceLineNo">177</span> });<a name="line.177"></a>
+<span class="sourceLineNo">178</span> }<a name="line.178"></a>
+<span class="sourceLineNo">179</span><a name="line.179"></a>
+<span class="sourceLineNo">180</span> private void put(ChannelHandlerContext ctx, FullHttpRequest req) {<a name="line.180"></a>
+<span class="sourceLineNo">181</span> Params params = parse(req);<a name="line.181"></a>
+<span class="sourceLineNo">182</span> byte[] value = new byte[req.content().readableBytes()];<a name="line.182"></a>
+<span class="sourceLineNo">183</span> req.content().readBytes(value);<a name="line.183"></a>
+<span class="sourceLineNo">184</span> conn.getRawTable(TableName.valueOf(params.table)).put(new Put(Bytes.toBytes(params.row))<a name="line.184"></a>
+<span class="sourceLineNo">185</span> .addColumn(Bytes.toBytes(params.family), Bytes.toBytes(params.qualifier), value))<a name="line.185"></a>
+<span class="sourceLineNo">186</span> .whenComplete((r, e) -> {<a name="line.186"></a>
+<span class="sourceLineNo">187</span> if (e != null) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span> exceptionCaught(ctx, e);<a name="line.188"></a>
+<span class="sourceLineNo">189</span> } else {<a name="line.189"></a>
+<span class="sourceLineNo">190</span> write(ctx, HttpResponseStatus.OK, Optional.empty());<a name="line.190"></a>
+<span class="sourceLineNo">191</span> }<a name="line.191"></a>
+<span class="sourceLineNo">192</span> });<a name="line.192"></a>
+<span class="sourceLineNo">193</span> }<a name="line.193"></a>
+<span class="sourceLineNo">194</span><a name="line.194"></a>
+<span class="sourceLineNo">195</span> @Override<a name="line.195"></a>
+<span class="sourceLineNo">196</span> protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) {<a name="line.196"></a>
+<span class="sourceLineNo">197</span> switch (req.method().name()) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> case "GET":<a name="line.198"></a>
+<span class="sourceLineNo">199</span> get(ctx, req);<a name="line.199"></a>
+<span class="sourceLineNo">200</span> break;<a name="line.200"></a>
+<span class="sourceLineNo">201</span> case "PUT":<a name="line.201"></a>
+<span class="sourceLineNo">202</span> put(ctx, req);<a name="line.202"></a>
+<span class="sourceLineNo">203</span> break;<a name="line.203"></a>
+<span class="sourceLineNo">204</span> default:<a name="line.204"></a>
+<span class="sourceLineNo">205</span> write(ctx, HttpResponseStatus.METHOD_NOT_ALLOWED, Optional.empty());<a name="line.205"></a>
+<span class="sourceLineNo">206</span> break;<a name="line.206"></a>
+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span> }<a name="line.208"></a>
+<span class="sourceLineNo">209</span><a name="line.209"></a>
+<span class="sourceLineNo">210</span> @Override<a name="line.210"></a>
+<span class="sourceLineNo">211</span> public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> if (cause instanceof IllegalArgumentException) {<a name="line.212"></a>
+<span class="sourceLineNo">213</span> write(ctx, HttpResponseStatus.BAD_REQUEST, Optional.of(cause.getMessage()));<a name="line.213"></a>
+<span class="sourceLineNo">214</span> } else {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> write(ctx, HttpResponseStatus.INTERNAL_SERVER_ERROR,<a name="line.215"></a>
+<span class="sourceLineNo">216</span> Optional.of(Throwables.getStackTraceAsString(cause)));<a name="line.216"></a>
+<span class="sourceLineNo">217</span> }<a name="line.217"></a>
+<span class="sourceLineNo">218</span> }<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span><a name="line.220"></a>
+<span class="sourceLineNo">221</span> public void start() throws InterruptedException, ExecutionException {<a name="line.221"></a>
+<span class="sourceLineNo">222</span> NettyRpcClientConfigHelper.setEventLoopConfig(conf, workerGroup, NioSocketChannel.class);<a name="line.222"></a>
+<span class="sourceLineNo">223</span> conn = ConnectionFactory.createAsyncConnection(conf).get();<a name="line.223"></a>
+<span class="sourceLineNo">224</span> channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);<a name="line.224"></a>
+<span class="sourceLineNo">225</span> serverChannel = new ServerBootstrap().group(bossGroup, workerGroup)<a name="line.225"></a>
+<span class="sourceLineNo">226</span> .channel(NioServerSocketChannel.class).childOption(ChannelOption.TCP_NODELAY, true)<a name="line.226"></a>
+<span class="sourceLineNo">227</span> .childHandler(new ChannelInitializer<Channel>() {<a name="line.227"></a>
+<span class="sourceLineNo">228</span><a name="line.228"></a>
+<span class="sourceLineNo">229</span> @Override<a name="line.229"></a>
+<span class="sourceLineNo">230</span> protected void initChannel(Channel ch) throws Exception {<a name="line.230"></a>
+<span class="sourceLineNo">231</span> ch.pipeline().addFirst(new HttpServerCodec(), new HttpObjectAggregator(4 * 1024 * 1024),<a name="line.231"></a>
+<span class="sourceLineNo">232</span> new RequestHandler(conn, channelGroup));<a name="line.232"></a>
+<span class="sourceLineNo">233</span> }<a name="line.233"></a>
+<span class="sourceLineNo">234</span> }).bind(port).syncUninterruptibly().channel();<a name="line.234"></a>
+<span class="sourceLineNo">235</span> }<a name="line.235"></a>
+<span class="sourceLineNo">236</span><a name="line.236"></a>
+<span class="sourceLineNo">237</span> public void join() {<a name="line.237"></a>
+<span class="sourceLineNo">238</span> serverChannel.closeFuture().awaitUninterruptibly();<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
+<span class="sourceLineNo">240</span><a name="line.240"></a>
+<span class="sourceLineNo">241</span> public int port() {<a name="line.241"></a>
+<span class="sourceLineNo">242</span> if (serverChannel == null) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> return port;<a name="line.243"></a>
+<span class="sourceLineNo">244</span> } else {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> return ((InetSocketAddress) serverChannel.localAddress()).getPort();<a name="line.245"></a>
+<span class="sourceLineNo">246</span> }<a name="line.246"></a>
+<span class="sourceLineNo">247</span> }<a name="line.247"></a>
+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span> public void stop() throws IOException {<a name="line.249"></a>
+<span class="sourceLineNo">250</span> serverChannel.close().syncUninterruptibly();<a name="line.250"></a>
+<span class="sourceLineNo">251</span> serverChannel = null;<a name="line.251"></a>
+<span class="sourceLineNo">252</span> channelGroup.close().syncUninterruptibly();<a name="line.252"></a>
+<span class="sourceLineNo">253</span> channelGroup = null;<a name="line.253"></a>
+<span class="sourceLineNo">254</span> conn.close();<a name="line.254"></a>
+<span class="sourceLineNo">255</span> conn = null;<a name="line.255"></a>
+<span class="sourceLineNo">256</span> }<a name="line.256"></a>
+<span class="sourceLineNo">257</span><a name="line.257"></a>
+<span class="sourceLineNo">258</span> public static void main(String[] args) throws InterruptedException, ExecutionException {<a name="line.258"></a>
+<span class="sourceLineNo">259</span> int port = Integer.parseInt(args[0]);<a name="line.259"></a>
+<span class="sourceLineNo">260</span> HttpProxyExample proxy = new HttpProxyExample(HBaseConfiguration.create(), port);<a name="line.260"></a>
+<span class="sourceLineNo">261</span> proxy.start();<a name="line.261"></a>
+<span class="sourceLineNo">262</span> proxy.join();<a name="line.262"></a>
+<span class="sourceLineNo">263</span> }<a name="line.263"></a>
+<span class="sourceLineNo">264</span>}<a name="line.264"></a>
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+</pre>
+</div>
+</body>
+</html>