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| <pre><span class="sourceLineNo">001</span>package org.apache.archiva.components.taskqueue.execution;<a name="line.1"></a> |
| <span class="sourceLineNo">002</span><a name="line.2"></a> |
| <span class="sourceLineNo">003</span>/*<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * or more contributor license agreements. See the NOTICE file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * distributed with this work for additional information<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * regarding copyright ownership. The ASF licenses this file<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * to you under the Apache License, Version 2.0 (the<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * "License"); you may not use this file except in compliance<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * with the License. You may obtain a copy of the License at<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> *<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * Unless required by applicable law or agreed to in writing,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * software distributed under the License is distributed on an<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * KIND, either express or implied. See the License for the<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> * specific language governing permissions and limitations<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> * under the License.<a name="line.19"></a> |
| <span class="sourceLineNo">020</span> */<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.archiva.components.taskqueue.Task;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.archiva.components.taskqueue.TaskQueue;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.commons.lang3.StringUtils;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.slf4j.Logger;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.slf4j.LoggerFactory;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import javax.annotation.PostConstruct;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import javax.annotation.PreDestroy;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.concurrent.CancellationException;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.concurrent.ExecutionException;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.concurrent.ExecutorService;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.util.concurrent.Executors;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.util.concurrent.Future;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import java.util.concurrent.TimeUnit;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import java.util.concurrent.TimeoutException;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span>/**<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * @author <a href="mailto:kenney@codehaus.org">Kenney Westerhof</a><a name="line.40"></a> |
| <span class="sourceLineNo">041</span> */<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>public class ThreadedTaskQueueExecutor<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> implements TaskQueueExecutor<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>{<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private Logger logger = LoggerFactory.getLogger( getClass( ) );<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> private static final int SHUTDOWN = 1;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private static final int CANCEL_TASK = 2;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> /**<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * requirement<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> */<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private TaskQueue queue;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> /**<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * requirement<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> */<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private TaskExecutor executor;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> /**<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * configuration<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> */<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> private String name;<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> private ExecutorRunnable executorRunnable;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> private ExecutorService executorService;<a name="line.73"></a> |
| <span class="sourceLineNo">074</span><a name="line.74"></a> |
| <span class="sourceLineNo">075</span> private Task currentTask;<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> private class ExecutorRunnable<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> extends Thread<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> private volatile int command;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> private boolean done;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span><a name="line.83"></a> |
| <span class="sourceLineNo">084</span> @Override<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> public void run( )<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> while ( command != SHUTDOWN )<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> final Task task;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span><a name="line.90"></a> |
| <span class="sourceLineNo">091</span> currentTask = null;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span><a name="line.92"></a> |
| <span class="sourceLineNo">093</span> try<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> task = queue.poll( 100, TimeUnit.MILLISECONDS );<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> catch ( InterruptedException e )<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> logger.info( "Executor thread interrupted, command: {}", ( command == SHUTDOWN<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> ? "Shutdown"<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> : command == CANCEL_TASK ? "Cancel task" : "Unknown" ) );<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> continue;<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> if ( task == null )<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> continue;<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> currentTask = task;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> Future future = executorService.submit( new Runnable( )<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> {<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> @Override<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> public void run( )<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> try<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> executor.executeTask( task );<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> catch ( TaskExecutionException e )<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> logger.error( "Error executing task: {}", e.getMessage( ), e );<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> } );<a name="line.126"></a> |
| <span class="sourceLineNo">127</span><a name="line.127"></a> |
| <span class="sourceLineNo">128</span> try<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> waitForTask( task, future );<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> }<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> catch ( ExecutionException e )<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> logger.error( "Error executing task: {}", e.getMessage( ), e );<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><a name="line.137"></a> |
| <span class="sourceLineNo">138</span> currentTask = null;<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> logger.info( "Executor thread '{}' exited.", name );<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> done = true;<a name="line.142"></a> |
| <span class="sourceLineNo">143</span><a name="line.143"></a> |
| <span class="sourceLineNo">144</span> synchronized (this)<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> notifyAll( );<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> }<a name="line.148"></a> |
| <span class="sourceLineNo">149</span><a name="line.149"></a> |
| <span class="sourceLineNo">150</span> private void waitForTask( Task task, Future future )<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> throws ExecutionException<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> boolean stop = false;<a name="line.153"></a> |
| <span class="sourceLineNo">154</span><a name="line.154"></a> |
| <span class="sourceLineNo">155</span> while ( !stop )<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> try<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> if ( task.getMaxExecutionTime( ) == 0 )<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> logger.debug( "Waiting indefinitely for task to complete" );<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> future.get( );<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> return;<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> else<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> logger.debug( "Waiting at most {} ms for task completion", task.getMaxExecutionTime( ) );<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> future.get( task.getMaxExecutionTime( ), TimeUnit.MILLISECONDS );<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> logger.debug( "Task completed within {} ms", task.getMaxExecutionTime( ) );<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> return;<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> }<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> catch ( InterruptedException e )<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> switch (command)<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> case SHUTDOWN:<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> logger.info( "Shutdown command received. Cancelling task." );<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> cancel( future );<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> return;<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> case CANCEL_TASK:<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> command = 0;<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> logger.info( "Cancelling task" );<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> cancel( future );<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> return;<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> }<a name="line.190"></a> |
| <span class="sourceLineNo">191</span><a name="line.191"></a> |
| <span class="sourceLineNo">192</span> default:<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> // when can this thread be interrupted, and should we ignore it if shutdown = false?<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> logger.warn( "Interrupted while waiting for task to complete; ignoring", e );<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> break;<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> }<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> catch ( TimeoutException e )<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> logger.warn( "Task {} didn't complete within time, cancelling it.", task );<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> cancel( future );<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> return;<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> }<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> catch ( CancellationException e )<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> {<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> logger.warn( "The task was cancelled", e );<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> return;<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> }<a name="line.210"></a> |
| <span class="sourceLineNo">211</span><a name="line.211"></a> |
| <span class="sourceLineNo">212</span> private void cancel( Future future )<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> if ( !future.cancel( true ) )<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> if ( !future.isDone( ) && !future.isCancelled( ) )<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> logger.warn( "Unable to cancel task" );<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> else<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> logger.warn(<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> "Task not cancelled (Flags: done: {} cancelled: {})", future.isDone( ), future.isCancelled( ) );<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> }<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> }<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> else<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> {<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> logger.debug( "Task successfully cancelled" );<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> }<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span><a name="line.231"></a> |
| <span class="sourceLineNo">232</span> public synchronized void shutdown( )<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> {<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> logger.debug( "Signalling executor thread to shutdown" );<a name="line.234"></a> |
| <span class="sourceLineNo">235</span><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> command = SHUTDOWN;<a name="line.236"></a> |
| <span class="sourceLineNo">237</span><a name="line.237"></a> |
| <span class="sourceLineNo">238</span> interrupt( );<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 synchronized boolean cancelTask( Task task )<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> if ( !task.equals( currentTask ) )<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> {<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> logger.debug( "Not cancelling task - it is not running" );<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> return false;<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> if ( command != SHUTDOWN )<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> {<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> logger.debug( "Signalling executor thread to cancel task" );<a name="line.251"></a> |
| <span class="sourceLineNo">252</span><a name="line.252"></a> |
| <span class="sourceLineNo">253</span> command = CANCEL_TASK;<a name="line.253"></a> |
| <span class="sourceLineNo">254</span><a name="line.254"></a> |
| <span class="sourceLineNo">255</span> interrupt( );<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> else<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> {<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> logger.debug( "Executor thread already stopping; task will be cancelled automatically" );<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span><a name="line.261"></a> |
| <span class="sourceLineNo">262</span> return true;<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> |
| <span class="sourceLineNo">265</span> public boolean isDone( )<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> return done;<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> }<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> }<a name="line.269"></a> |
| <span class="sourceLineNo">270</span><a name="line.270"></a> |
| <span class="sourceLineNo">271</span> // ----------------------------------------------------------------------<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> // Component lifecycle<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> // ----------------------------------------------------------------------<a name="line.273"></a> |
| <span class="sourceLineNo">274</span><a name="line.274"></a> |
| <span class="sourceLineNo">275</span> @PostConstruct<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> public void start( )<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span><a name="line.278"></a> |
| <span class="sourceLineNo">279</span> if ( StringUtils.isBlank( name ) )<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> {<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> throw new IllegalArgumentException( "'name' must be set." );<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> logger.info( "Starting task executor, thread name '{}'.", name );<a name="line.284"></a> |
| <span class="sourceLineNo">285</span><a name="line.285"></a> |
| <span class="sourceLineNo">286</span> this.executorService = Executors.newSingleThreadExecutor( );<a name="line.286"></a> |
| <span class="sourceLineNo">287</span><a name="line.287"></a> |
| <span class="sourceLineNo">288</span> executorRunnable = new ExecutorRunnable( );<a name="line.288"></a> |
| <span class="sourceLineNo">289</span><a name="line.289"></a> |
| <span class="sourceLineNo">290</span> executorRunnable.setDaemon( true );<a name="line.290"></a> |
| <span class="sourceLineNo">291</span><a name="line.291"></a> |
| <span class="sourceLineNo">292</span> executorRunnable.start( );<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> }<a name="line.293"></a> |
| <span class="sourceLineNo">294</span><a name="line.294"></a> |
| <span class="sourceLineNo">295</span> @PreDestroy<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> public void stop( )<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> {<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> executorRunnable.shutdown( );<a name="line.298"></a> |
| <span class="sourceLineNo">299</span><a name="line.299"></a> |
| <span class="sourceLineNo">300</span> int maxSleep = 10 * 1000; // 10 seconds<a name="line.300"></a> |
| <span class="sourceLineNo">301</span><a name="line.301"></a> |
| <span class="sourceLineNo">302</span> int interval = 1000;<a name="line.302"></a> |
| <span class="sourceLineNo">303</span><a name="line.303"></a> |
| <span class="sourceLineNo">304</span> long endTime = System.currentTimeMillis( ) + maxSleep;<a name="line.304"></a> |
| <span class="sourceLineNo">305</span><a name="line.305"></a> |
| <span class="sourceLineNo">306</span> while ( !executorRunnable.isDone( ) && executorRunnable.isAlive( ) )<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if ( System.currentTimeMillis( ) > endTime )<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> logger.warn( "Timeout waiting for executor thread '{}' to stop, aborting", name );<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> break;<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> |
| <span class="sourceLineNo">314</span> logger.info( "Waiting until task executor '{}' is idling...", name );<a name="line.314"></a> |
| <span class="sourceLineNo">315</span><a name="line.315"></a> |
| <span class="sourceLineNo">316</span> try<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> {<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> synchronized (executorRunnable)<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> {<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> executorRunnable.wait( interval );<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> }<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> }<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> catch ( InterruptedException ex )<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> {<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> // ignore<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> }<a name="line.326"></a> |
| <span class="sourceLineNo">327</span><a name="line.327"></a> |
| <span class="sourceLineNo">328</span> // notify again, just in case.<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> executorRunnable.shutdown( );<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> }<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> }<a name="line.331"></a> |
| <span class="sourceLineNo">332</span><a name="line.332"></a> |
| <span class="sourceLineNo">333</span> @Override<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> public Task getCurrentTask( )<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> {<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> return currentTask;<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> }<a name="line.337"></a> |
| <span class="sourceLineNo">338</span><a name="line.338"></a> |
| <span class="sourceLineNo">339</span> @Override<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> public synchronized boolean cancelTask( Task task )<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> {<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> return executorRunnable.cancelTask( task );<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> }<a name="line.343"></a> |
| <span class="sourceLineNo">344</span><a name="line.344"></a> |
| <span class="sourceLineNo">345</span> public TaskQueue getQueue( )<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> {<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> return queue;<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> }<a name="line.348"></a> |
| <span class="sourceLineNo">349</span><a name="line.349"></a> |
| <span class="sourceLineNo">350</span> public void setQueue( TaskQueue queue )<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> {<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> this.queue = queue;<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> }<a name="line.353"></a> |
| <span class="sourceLineNo">354</span><a name="line.354"></a> |
| <span class="sourceLineNo">355</span> public TaskExecutor getExecutor( )<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> {<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> return executor;<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> }<a name="line.358"></a> |
| <span class="sourceLineNo">359</span><a name="line.359"></a> |
| <span class="sourceLineNo">360</span> public void setExecutor( TaskExecutor executor )<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> {<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> this.executor = executor;<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> }<a name="line.363"></a> |
| <span class="sourceLineNo">364</span><a name="line.364"></a> |
| <span class="sourceLineNo">365</span> public String getName( )<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> {<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> return name;<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> }<a name="line.368"></a> |
| <span class="sourceLineNo">369</span><a name="line.369"></a> |
| <span class="sourceLineNo">370</span> public void setName( String name )<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> {<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> this.name = name;<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> }<a name="line.373"></a> |
| <span class="sourceLineNo">374</span>}<a name="line.374"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
