| <!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.ipc;<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.nio.channels.CancelledKeyException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.nio.channels.ClosedChannelException;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.nio.channels.SelectionKey;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.nio.channels.Selector;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.ArrayList;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Collections;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.Iterator;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Set;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span><a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.util.StringUtils;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span>/**<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * Sends responses of RPC back to clients.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> */<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>@InterfaceAudience.Private<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>class SimpleRpcServerResponder extends Thread {<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private final SimpleRpcServer simpleRpcServer;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private final Selector writeSelector;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private final Set<SimpleServerRpcConnection> writingCons =<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> Collections.newSetFromMap(new ConcurrentHashMap<>());<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> SimpleRpcServerResponder(SimpleRpcServer simpleRpcServer) throws IOException {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> this.simpleRpcServer = simpleRpcServer;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> this.setName("RpcServer.responder");<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> this.setDaemon(true);<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> this.setUncaughtExceptionHandler(Threads.LOGGING_EXCEPTION_HANDLER);<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> writeSelector = Selector.open(); // create a selector<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> }<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> @Override<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> public void run() {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> SimpleRpcServer.LOG.debug(getName() + ": starting");<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> try {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> doRunLoop();<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> } finally {<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> SimpleRpcServer.LOG.info(getName() + ": stopping");<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> try {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> writeSelector.close();<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> } catch (IOException ioe) {<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> SimpleRpcServer.LOG.error(getName() + ": couldn't close write selector", ioe);<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> }<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> /**<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * Take the list of the connections that want to write, and register them in the selector.<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> */<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> private void registerWrites() {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> Iterator<SimpleServerRpcConnection> it = writingCons.iterator();<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> while (it.hasNext()) {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> SimpleServerRpcConnection c = it.next();<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> it.remove();<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> SelectionKey sk = c.channel.keyFor(writeSelector);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> try {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> if (sk == null) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> try {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> c.channel.register(writeSelector, SelectionKey.OP_WRITE, c);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> } catch (ClosedChannelException e) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> // ignore: the client went away.<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> if (SimpleRpcServer.LOG.isTraceEnabled()) SimpleRpcServer.LOG.trace("ignored", e);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> }<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> } else {<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> sk.interestOps(SelectionKey.OP_WRITE);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> } catch (CancelledKeyException e) {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> // ignore: the client went away.<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (SimpleRpcServer.LOG.isTraceEnabled()) SimpleRpcServer.LOG.trace("ignored", e);<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> }<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<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> /**<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> * Add a connection to the list that want to write,<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> */<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public void registerForWrite(SimpleServerRpcConnection c) {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> if (writingCons.add(c)) {<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> writeSelector.wakeup();<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> }<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> private void doRunLoop() {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> long lastPurgeTime = 0; // last check for old calls.<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> while (this.simpleRpcServer.running) {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> try {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> registerWrites();<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> int keyCt = writeSelector.select(this.simpleRpcServer.purgeTimeout);<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if (keyCt == 0) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> continue;<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span><a name="line.115"></a> |
| <span class="sourceLineNo">116</span> Set<SelectionKey> keys = writeSelector.selectedKeys();<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> Iterator<SelectionKey> iter = keys.iterator();<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> while (iter.hasNext()) {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> SelectionKey key = iter.next();<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> iter.remove();<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> try {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> if (key.isValid() && key.isWritable()) {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> doAsyncWrite(key);<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> } catch (IOException e) {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> SimpleRpcServer.LOG.debug(getName() + ": asyncWrite", e);<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> }<a name="line.128"></a> |
| <span class="sourceLineNo">129</span><a name="line.129"></a> |
| <span class="sourceLineNo">130</span> lastPurgeTime = purge(lastPurgeTime);<a name="line.130"></a> |
| <span class="sourceLineNo">131</span><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> } catch (OutOfMemoryError e) {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> if (this.simpleRpcServer.errorHandler != null) {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> if (this.simpleRpcServer.errorHandler.checkOOME(e)) {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> SimpleRpcServer.LOG.info(getName() + ": exiting on OutOfMemoryError");<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> return;<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> } else {<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> //<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> // we can run out of memory if we have too many threads<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> // log the event and sleep for a minute and give<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> // some thread(s) a chance to finish<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> //<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> SimpleRpcServer.LOG.warn(getName() + ": OutOfMemoryError in server select", e);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> try {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> Thread.sleep(60000);<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> } catch (InterruptedException ex) {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> SimpleRpcServer.LOG.debug("Interrupted while sleeping");<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> return;<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> } catch (Exception e) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> SimpleRpcServer.LOG<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> .warn(getName() + ": exception in Responder " + StringUtils.stringifyException(e), e);<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> }<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> SimpleRpcServer.LOG.info(getName() + ": stopped");<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<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> * If there were some calls that have not been sent out for a long time, we close the connection.<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> * @return the time of the purge.<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> */<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> private long purge(long lastPurgeTime) {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> long now = System.currentTimeMillis();<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> if (now < lastPurgeTime + this.simpleRpcServer.purgeTimeout) {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> return lastPurgeTime;<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> }<a name="line.168"></a> |
| <span class="sourceLineNo">169</span><a name="line.169"></a> |
| <span class="sourceLineNo">170</span> ArrayList<SimpleServerRpcConnection> conWithOldCalls = new ArrayList<>();<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> // get the list of channels from list of keys.<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> synchronized (writeSelector.keys()) {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> for (SelectionKey key : writeSelector.keys()) {<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> SimpleServerRpcConnection connection = (SimpleServerRpcConnection) key.attachment();<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> if (connection == null) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> throw new IllegalStateException("Coding error: SelectionKey key without attachment.");<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> }<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> if (connection.lastSentTime > 0 &&<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> now > connection.lastSentTime + this.simpleRpcServer.purgeTimeout) {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> conWithOldCalls.add(connection);<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> }<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> }<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> }<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> // Seems safer to close the connection outside of the synchronized loop...<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> for (SimpleServerRpcConnection connection : conWithOldCalls) {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> this.simpleRpcServer.closeConnection(connection);<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span><a name="line.189"></a> |
| <span class="sourceLineNo">190</span> return now;<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> private void doAsyncWrite(SelectionKey key) throws IOException {<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> SimpleServerRpcConnection connection = (SimpleServerRpcConnection) key.attachment();<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> if (connection == null) {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> throw new IOException("doAsyncWrite: no connection");<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> if (key.channel() != connection.channel) {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> throw new IOException("doAsyncWrite: bad channel");<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> }<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> if (processAllResponses(connection)) {<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> try {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> // We wrote everything, so we don't need to be told when the socket is ready for<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> // write anymore.<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> key.interestOps(0);<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> } catch (CancelledKeyException e) {<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> /*<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> * The Listener/reader might have closed the socket. We don't explicitly cancel the key, so<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * not sure if this will ever fire. This warning could be removed.<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> */<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> SimpleRpcServer.LOG.warn("Exception while changing ops : " + e);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> /**<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> * Process the response for this call. You need to have the lock on<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> * {@link org.apache.hadoop.hbase.ipc.SimpleServerRpcConnection#responseWriteLock}<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> * @return true if we proceed the call fully, false otherwise.<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> * @throws IOException<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> */<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> private boolean processResponse(SimpleServerRpcConnection conn, RpcResponse resp)<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> throws IOException {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> boolean error = true;<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> BufferChain buf = resp.getResponse();<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> try {<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> // Send as much data as we can in the non-blocking fashion<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> long numBytes =<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> this.simpleRpcServer.channelWrite(conn.channel, buf);<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> if (numBytes < 0) {<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> throw new HBaseIOException("Error writing on the socket " + conn);<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> }<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> error = false;<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> } finally {<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> if (error) {<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> SimpleRpcServer.LOG.debug(conn + ": output error -- closing");<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> // We will be closing this connection itself. Mark this call as done so that all the<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> // buffer(s) it got from pool can get released<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> resp.done();<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> this.simpleRpcServer.closeConnection(conn);<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> }<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> }<a name="line.243"></a> |
| <span class="sourceLineNo">244</span><a name="line.244"></a> |
| <span class="sourceLineNo">245</span> if (!buf.hasRemaining()) {<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> resp.done();<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> return true;<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> } else {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> // set the serve time when the response has to be sent later<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> conn.lastSentTime = System.currentTimeMillis();<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> return false; // Socket can't take more, we will have to come back.<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> }<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> }<a name="line.253"></a> |
| <span class="sourceLineNo">254</span><a name="line.254"></a> |
| <span class="sourceLineNo">255</span> /**<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> * Process all the responses for this connection<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> * @return true if all the calls were processed or that someone else is doing it. false if there *<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> * is still some work to do. In this case, we expect the caller to delay us.<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> * @throws IOException<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> */<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> private boolean processAllResponses(final SimpleServerRpcConnection connection)<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> throws IOException {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> // We want only one writer on the channel for a connection at a time.<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> connection.responseWriteLock.lock();<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> try {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> for (int i = 0; i < 20; i++) {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> // protection if some handlers manage to need all the responder<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> RpcResponse resp = connection.responseQueue.pollFirst();<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> if (resp == null) {<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> return true;<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> if (!processResponse(connection, resp)) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> connection.responseQueue.addFirst(resp);<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> return false;<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> }<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> } finally {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> connection.responseWriteLock.unlock();<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> }<a name="line.279"></a> |
| <span class="sourceLineNo">280</span><a name="line.280"></a> |
| <span class="sourceLineNo">281</span> return connection.responseQueue.isEmpty();<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> }<a name="line.282"></a> |
| <span class="sourceLineNo">283</span><a name="line.283"></a> |
| <span class="sourceLineNo">284</span> //<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> // Enqueue a response from the application.<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> //<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> void doRespond(SimpleServerRpcConnection conn, RpcResponse resp) throws IOException {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> boolean added = false;<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> // If there is already a write in progress, we don't wait. This allows to free the handlers<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> // immediately for other tasks.<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> if (conn.responseQueue.isEmpty() && conn.responseWriteLock.tryLock()) {<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> try {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> if (conn.responseQueue.isEmpty()) {<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> // If we're alone, we can try to do a direct call to the socket. It's<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> // an optimization to save on context switches and data transfer between cores..<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> if (processResponse(conn, resp)) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> return; // we're done.<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> }<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> // Too big to fit, putting ahead.<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> conn.responseQueue.addFirst(resp);<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> added = true; // We will register to the selector later, outside of the lock.<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> }<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> } finally {<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> conn.responseWriteLock.unlock();<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> }<a name="line.306"></a> |
| <span class="sourceLineNo">307</span><a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if (!added) {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> conn.responseQueue.addLast(resp);<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> }<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> registerForWrite(conn);<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span>}<a name="line.313"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |