<!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_fedx.css" title="Style">
</head>
<body>
<div class="sourceContainer">
<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2008-2013, fluid Operations AG<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * FedX is free software: you can redistribute it and/or modify<a name="line.4"></a>
<span class="sourceLineNo">005</span> * it under the terms of the GNU Affero General Public License as<a name="line.5"></a>
<span class="sourceLineNo">006</span> * published by the Free Software Foundation, either version 3 of the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * License, or (at your option) any later version.<a name="line.7"></a>
<span class="sourceLineNo">008</span> * <a name="line.8"></a>
<span class="sourceLineNo">009</span> * This program is distributed in the hope that it will be useful,<a name="line.9"></a>
<span class="sourceLineNo">010</span> * but WITHOUT ANY WARRANTY; without even the implied warranty of<a name="line.10"></a>
<span class="sourceLineNo">011</span> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the<a name="line.11"></a>
<span class="sourceLineNo">012</span> * GNU Affero General Public License for more details.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * <a name="line.13"></a>
<span class="sourceLineNo">014</span> * You should have received a copy of the GNU Affero General Public License<a name="line.14"></a>
<span class="sourceLineNo">015</span> * along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>package com.fluidops.fedx;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.File;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.FileInputStream;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.ArrayList;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.Properties;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.Executor;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.Executors;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.log4j.Logger;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.openrdf.query.BindingSet;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.openrdf.repository.Repository;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.openrdf.repository.RepositoryException;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.openrdf.repository.sail.SailRepository;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>import com.fluidops.fedx.cache.Cache;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import com.fluidops.fedx.evaluation.EvaluationStrategyFactory;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import com.fluidops.fedx.evaluation.FederationEvalStrategy;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import com.fluidops.fedx.evaluation.SailFederationEvalStrategy;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import com.fluidops.fedx.evaluation.SparqlFederationEvalStrategy;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import com.fluidops.fedx.evaluation.concurrent.ControlledWorkerScheduler;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import com.fluidops.fedx.evaluation.concurrent.Scheduler;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import com.fluidops.fedx.evaluation.union.ControlledWorkerUnion;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import com.fluidops.fedx.evaluation.union.SynchronousWorkerUnion;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import com.fluidops.fedx.evaluation.union.WorkerUnionBase;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import com.fluidops.fedx.exception.FedXException;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import com.fluidops.fedx.exception.FedXRuntimeException;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import com.fluidops.fedx.monitoring.Monitoring;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import com.fluidops.fedx.monitoring.MonitoringFactory;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import com.fluidops.fedx.monitoring.MonitoringUtil;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import com.fluidops.fedx.sail.FedXSailRepository;<a name="line.50"></a>
<span class="sourceLineNo">051</span>import com.fluidops.fedx.statistics.Statistics;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import com.fluidops.fedx.structures.Endpoint;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import com.fluidops.fedx.structures.Endpoint.EndpointClassification;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import com.fluidops.fedx.structures.Endpoint.EndpointType;<a name="line.54"></a>
<span class="sourceLineNo">055</span>import com.fluidops.fedx.structures.QueryInfo;<a name="line.55"></a>
<span class="sourceLineNo">056</span>import com.fluidops.fedx.util.Version;<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>/**<a name="line.61"></a>
<span class="sourceLineNo">062</span> * The FederationManager manages all modules necessary for the runtime behavior. This includes for <a name="line.62"></a>
<span class="sourceLineNo">063</span> * instance the federation layer instance, cache and statistics. It is Singleton and there can only <a name="line.63"></a>
<span class="sourceLineNo">064</span> * be on federation instance at a time.&lt;p&gt;<a name="line.64"></a>
<span class="sourceLineNo">065</span> * <a name="line.65"></a>
<span class="sourceLineNo">066</span> * The factory {@link FedXFactory} provides various functions for initialization of FedX and should <a name="line.66"></a>
<span class="sourceLineNo">067</span> * be used as the entry point for any application using FedX.&lt;p&gt;<a name="line.67"></a>
<span class="sourceLineNo">068</span> * <a name="line.68"></a>
<span class="sourceLineNo">069</span> * &lt;code&gt;<a name="line.69"></a>
<span class="sourceLineNo">070</span> * Config.initialize(fedxConfig);<a name="line.70"></a>
<span class="sourceLineNo">071</span> * List&amp;ltEndpoint&amp;gt members = ...                     // e.g. use EndpointFactory methods<a name="line.71"></a>
<span class="sourceLineNo">072</span> * FedX fed = FedXFactory.initializeFederation(members);<a name="line.72"></a>
<span class="sourceLineNo">073</span> * SailRepository repo = new SailRepository(fed);<a name="line.73"></a>
<span class="sourceLineNo">074</span> * ReositoryConnection conn = repo.getConnection();<a name="line.74"></a>
<span class="sourceLineNo">075</span> * <a name="line.75"></a>
<span class="sourceLineNo">076</span> * // Do something with the connection, e.g. query evaluation<a name="line.76"></a>
<span class="sourceLineNo">077</span> * &lt;/code&gt;<a name="line.77"></a>
<span class="sourceLineNo">078</span> * <a name="line.78"></a>
<span class="sourceLineNo">079</span> * @author Andreas Schwarte<a name="line.79"></a>
<span class="sourceLineNo">080</span> *<a name="line.80"></a>
<span class="sourceLineNo">081</span> */<a name="line.81"></a>
<span class="sourceLineNo">082</span>public class FederationManager {<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>        public static Logger log = Logger.getLogger(FederationManager.class);<a name="line.84"></a>
<span class="sourceLineNo">085</span>        <a name="line.85"></a>
<span class="sourceLineNo">086</span>        /**<a name="line.86"></a>
<span class="sourceLineNo">087</span>         * The Federation type definition: Local, Remote, Hybrid<a name="line.87"></a>
<span class="sourceLineNo">088</span>         * <a name="line.88"></a>
<span class="sourceLineNo">089</span>         * @author Andreas Schwarte<a name="line.89"></a>
<span class="sourceLineNo">090</span>         */<a name="line.90"></a>
<span class="sourceLineNo">091</span>        public static enum FederationType { LOCAL, REMOTE, HYBRID; }<a name="line.91"></a>
<span class="sourceLineNo">092</span>        <a name="line.92"></a>
<span class="sourceLineNo">093</span>        /**<a name="line.93"></a>
<span class="sourceLineNo">094</span>         * The singleton instance of the federation manager<a name="line.94"></a>
<span class="sourceLineNo">095</span>         */<a name="line.95"></a>
<span class="sourceLineNo">096</span>        private static FederationManager instance = null;<a name="line.96"></a>
<span class="sourceLineNo">097</span>        <a name="line.97"></a>
<span class="sourceLineNo">098</span>        <a name="line.98"></a>
<span class="sourceLineNo">099</span>        /**<a name="line.99"></a>
<span class="sourceLineNo">100</span>         * Initialize the Singleton {@link FederationManager} instance with the provided information. The<a name="line.100"></a>
<span class="sourceLineNo">101</span>         * {@link FederationManager} remains initialized until {@link #shutDown()} is invoked. <a name="line.101"></a>
<span class="sourceLineNo">102</span>         * <a name="line.102"></a>
<span class="sourceLineNo">103</span>         * @param members<a name="line.103"></a>
<span class="sourceLineNo">104</span>         *                              initialize the federation with a list of repository members, null and empty lists are allowed<a name="line.104"></a>
<span class="sourceLineNo">105</span>         * @param cache<a name="line.105"></a>
<span class="sourceLineNo">106</span>         *                              the cache instance to be used<a name="line.106"></a>
<span class="sourceLineNo">107</span>         * @param statistics<a name="line.107"></a>
<span class="sourceLineNo">108</span>         *                              the statistics instance to be used<a name="line.108"></a>
<span class="sourceLineNo">109</span>         */<a name="line.109"></a>
<span class="sourceLineNo">110</span>        public static SailRepository initialize(List&lt;Endpoint&gt; members, Cache cache, Statistics statistics) {<a name="line.110"></a>
<span class="sourceLineNo">111</span>                if (instance!=null)<a name="line.111"></a>
<span class="sourceLineNo">112</span>                        throw new FedXRuntimeException("FederationManager already initialized.");<a name="line.112"></a>
<span class="sourceLineNo">113</span>                <a name="line.113"></a>
<span class="sourceLineNo">114</span>                log.info("Initializing federation manager ...");<a name="line.114"></a>
<span class="sourceLineNo">115</span>                log.info("FedX Version Information: " + Version.getVersionString());            <a name="line.115"></a>
<span class="sourceLineNo">116</span><a name="line.116"></a>
<span class="sourceLineNo">117</span>                monitoring = MonitoringFactory.createMonitoring();              <a name="line.117"></a>
<span class="sourceLineNo">118</span>                <a name="line.118"></a>
<span class="sourceLineNo">119</span>                Executor ex = Executors.newCachedThreadPool();<a name="line.119"></a>
<span class="sourceLineNo">120</span>                FedX federation = new FedX(members);<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span>                FedXSailRepository repo = new FedXSailRepository(federation);<a name="line.122"></a>
<span class="sourceLineNo">123</span>                <a name="line.123"></a>
<span class="sourceLineNo">124</span>                instance = new FederationManager(federation, cache, statistics, ex, repo);<a name="line.124"></a>
<span class="sourceLineNo">125</span>                instance.updateStrategy();<a name="line.125"></a>
<span class="sourceLineNo">126</span>                instance.reset();               <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>                        repo.initialize();<a name="line.129"></a>
<span class="sourceLineNo">130</span>                } catch (RepositoryException e) {<a name="line.130"></a>
<span class="sourceLineNo">131</span>                        // should never occur<a name="line.131"></a>
<span class="sourceLineNo">132</span>                        throw new FedXRuntimeException(e);      <a name="line.132"></a>
<span class="sourceLineNo">133</span>                }<a name="line.133"></a>
<span class="sourceLineNo">134</span>                <a name="line.134"></a>
<span class="sourceLineNo">135</span>                EndpointManager.initialize(members);<a name="line.135"></a>
<span class="sourceLineNo">136</span>                <a name="line.136"></a>
<span class="sourceLineNo">137</span>                if (Config.getConfig().isEnableJMX()) {<a name="line.137"></a>
<span class="sourceLineNo">138</span>                        try {<a name="line.138"></a>
<span class="sourceLineNo">139</span>                                MonitoringUtil.initializeJMXMonitoring();<a name="line.139"></a>
<span class="sourceLineNo">140</span>                        } catch (Exception e1) {<a name="line.140"></a>
<span class="sourceLineNo">141</span>                                log.error("JMX monitoring could not be initialized: " + e1.getMessage());<a name="line.141"></a>
<span class="sourceLineNo">142</span>                        }<a name="line.142"></a>
<span class="sourceLineNo">143</span>                }<a name="line.143"></a>
<span class="sourceLineNo">144</span>                <a name="line.144"></a>
<span class="sourceLineNo">145</span>                // initialize prefix declarations, if any<a name="line.145"></a>
<span class="sourceLineNo">146</span>                String prefixFile = Config.getConfig().getPrefixDeclarations();<a name="line.146"></a>
<span class="sourceLineNo">147</span>                if (prefixFile!=null) {<a name="line.147"></a>
<span class="sourceLineNo">148</span>                        QueryManager qm = instance.getQueryManager();<a name="line.148"></a>
<span class="sourceLineNo">149</span>                        Properties props = new Properties();<a name="line.149"></a>
<span class="sourceLineNo">150</span>                        try     {<a name="line.150"></a>
<span class="sourceLineNo">151</span>                                props.load(new FileInputStream(new File(prefixFile)));<a name="line.151"></a>
<span class="sourceLineNo">152</span>                        } catch (IOException e) {<a name="line.152"></a>
<span class="sourceLineNo">153</span>                                throw new FedXRuntimeException("Error loading prefix properties: " + e.getMessage());<a name="line.153"></a>
<span class="sourceLineNo">154</span>                        }<a name="line.154"></a>
<span class="sourceLineNo">155</span>                        <a name="line.155"></a>
<span class="sourceLineNo">156</span>                        for (String ns : props.stringPropertyNames()) {<a name="line.156"></a>
<span class="sourceLineNo">157</span>                                qm.addPrefixDeclaration(ns, props.getProperty(ns));     // register namespace/prefix pair<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>                return repo;<a name="line.161"></a>
<span class="sourceLineNo">162</span>        }<a name="line.162"></a>
<span class="sourceLineNo">163</span>        <a name="line.163"></a>
<span class="sourceLineNo">164</span>        <a name="line.164"></a>
<span class="sourceLineNo">165</span>        /**<a name="line.165"></a>
<span class="sourceLineNo">166</span>         * Return the initialized {@link FederationManager} instance.<a name="line.166"></a>
<span class="sourceLineNo">167</span>         * <a name="line.167"></a>
<span class="sourceLineNo">168</span>         * @return<a name="line.168"></a>
<span class="sourceLineNo">169</span>         *              the federation manager<a name="line.169"></a>
<span class="sourceLineNo">170</span>         */<a name="line.170"></a>
<span class="sourceLineNo">171</span>        public static FederationManager getInstance() {<a name="line.171"></a>
<span class="sourceLineNo">172</span>                if (instance==null)<a name="line.172"></a>
<span class="sourceLineNo">173</span>                        throw new FedXRuntimeException("FederationManager has not been initialized yet, call #initialize() first.");<a name="line.173"></a>
<span class="sourceLineNo">174</span>                return instance;<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>         * Returns true if the {@link FederationManager} is initialized.<a name="line.179"></a>
<span class="sourceLineNo">180</span>         * <a name="line.180"></a>
<span class="sourceLineNo">181</span>         * @return<a name="line.181"></a>
<span class="sourceLineNo">182</span>         *              true or false;<a name="line.182"></a>
<span class="sourceLineNo">183</span>         */<a name="line.183"></a>
<span class="sourceLineNo">184</span>        public static boolean isInitialized() {<a name="line.184"></a>
<span class="sourceLineNo">185</span>                return instance!=null;<a name="line.185"></a>
<span class="sourceLineNo">186</span>        }<a name="line.186"></a>
<span class="sourceLineNo">187</span>        <a name="line.187"></a>
<span class="sourceLineNo">188</span>        <a name="line.188"></a>
<span class="sourceLineNo">189</span>        static Monitoring monitoring;<a name="line.189"></a>
<span class="sourceLineNo">190</span>        <a name="line.190"></a>
<span class="sourceLineNo">191</span>        public static Monitoring getMonitoringService() {<a name="line.191"></a>
<span class="sourceLineNo">192</span>                if (!isInitialized())<a name="line.192"></a>
<span class="sourceLineNo">193</span>                        throw new IllegalStateException("Monitoring service can only be used if FedX is initialized.");<a name="line.193"></a>
<span class="sourceLineNo">194</span>                return monitoring;<a name="line.194"></a>
<span class="sourceLineNo">195</span>        }<a name="line.195"></a>
<span class="sourceLineNo">196</span>        <a name="line.196"></a>
<span class="sourceLineNo">197</span>        /* Instance variables */<a name="line.197"></a>
<span class="sourceLineNo">198</span>        protected FedX federation;<a name="line.198"></a>
<span class="sourceLineNo">199</span>        protected Cache cache;<a name="line.199"></a>
<span class="sourceLineNo">200</span>        protected Statistics statistics;<a name="line.200"></a>
<span class="sourceLineNo">201</span>        protected Executor executor;<a name="line.201"></a>
<span class="sourceLineNo">202</span>        protected FederationEvalStrategy strategy;<a name="line.202"></a>
<span class="sourceLineNo">203</span>        protected FederationType type;<a name="line.203"></a>
<span class="sourceLineNo">204</span>        protected ControlledWorkerScheduler&lt;BindingSet&gt; joinScheduler;<a name="line.204"></a>
<span class="sourceLineNo">205</span>        protected ControlledWorkerScheduler&lt;BindingSet&gt; unionScheduler;<a name="line.205"></a>
<span class="sourceLineNo">206</span>        protected QueryManager queryManager;<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>        <a name="line.210"></a>
<span class="sourceLineNo">211</span>        private FederationManager(FedX federation, Cache cache, Statistics statistics, Executor executor, Repository repo) {<a name="line.211"></a>
<span class="sourceLineNo">212</span>                this.federation = federation;<a name="line.212"></a>
<span class="sourceLineNo">213</span>                this.cache = cache;<a name="line.213"></a>
<span class="sourceLineNo">214</span>                this.statistics = statistics;<a name="line.214"></a>
<span class="sourceLineNo">215</span>                this.executor = executor;<a name="line.215"></a>
<span class="sourceLineNo">216</span>                QueryManager.instance = new QueryManager(this, repo);           // initialize the singleton query manager<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>        public FedX getFederation() {<a name="line.220"></a>
<span class="sourceLineNo">221</span>                return federation;<a name="line.221"></a>
<span class="sourceLineNo">222</span>        }<a name="line.222"></a>
<span class="sourceLineNo">223</span>        <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>         * Reset the {@link Scheduler} instances, i.e. abort all running threads and create a new<a name="line.226"></a>
<span class="sourceLineNo">227</span>         * scheduler instance.<a name="line.227"></a>
<span class="sourceLineNo">228</span>         */<a name="line.228"></a>
<span class="sourceLineNo">229</span>        public void reset() {<a name="line.229"></a>
<span class="sourceLineNo">230</span>                if (log.isDebugEnabled()) {<a name="line.230"></a>
<span class="sourceLineNo">231</span>                        log.debug("Scheduler for join and union operations initialized with " + Config.getConfig().getJoinWorkerThreads() + " and " + Config.getConfig().getUnionWorkerThreads() + " worker threads, respectively.");<a name="line.231"></a>
<span class="sourceLineNo">232</span>                }<a name="line.232"></a>
<span class="sourceLineNo">233</span>                <a name="line.233"></a>
<span class="sourceLineNo">234</span>                if (joinScheduler!=null)<a name="line.234"></a>
<span class="sourceLineNo">235</span>                        joinScheduler.abort();<a name="line.235"></a>
<span class="sourceLineNo">236</span>                joinScheduler = new ControlledWorkerScheduler&lt;BindingSet&gt;(Config.getConfig().getJoinWorkerThreads(), "Join Scheduler");           <a name="line.236"></a>
<span class="sourceLineNo">237</span>                <a name="line.237"></a>
<span class="sourceLineNo">238</span>                if (unionScheduler!=null)<a name="line.238"></a>
<span class="sourceLineNo">239</span>                        unionScheduler.abort();<a name="line.239"></a>
<span class="sourceLineNo">240</span>                unionScheduler = new ControlledWorkerScheduler&lt;BindingSet&gt;(Config.getConfig().getUnionWorkerThreads(), "Union Scheduler");                <a name="line.240"></a>
<span class="sourceLineNo">241</span>                <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>        public Cache getCache() {<a name="line.245"></a>
<span class="sourceLineNo">246</span>                return cache;<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 Statistics getStatistics() {<a name="line.249"></a>
<span class="sourceLineNo">250</span>                return statistics;<a name="line.250"></a>
<span class="sourceLineNo">251</span>        }<a name="line.251"></a>
<span class="sourceLineNo">252</span>        <a name="line.252"></a>
<span class="sourceLineNo">253</span>        public Executor getExecutor() {<a name="line.253"></a>
<span class="sourceLineNo">254</span>                return executor;<a name="line.254"></a>
<span class="sourceLineNo">255</span>        }<a name="line.255"></a>
<span class="sourceLineNo">256</span>        <a name="line.256"></a>
<span class="sourceLineNo">257</span>        public Monitoring getMonitoring() {<a name="line.257"></a>
<span class="sourceLineNo">258</span>                return monitoring;<a name="line.258"></a>
<span class="sourceLineNo">259</span>        }<a name="line.259"></a>
<span class="sourceLineNo">260</span>        <a name="line.260"></a>
<span class="sourceLineNo">261</span>        public FederationEvalStrategy getStrategy() {<a name="line.261"></a>
<span class="sourceLineNo">262</span>                return strategy;<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 ControlledWorkerScheduler&lt;BindingSet&gt; getJoinScheduler() {<a name="line.265"></a>
<span class="sourceLineNo">266</span>                return joinScheduler;<a name="line.266"></a>
<span class="sourceLineNo">267</span>        }<a name="line.267"></a>
<span class="sourceLineNo">268</span><a name="line.268"></a>
<span class="sourceLineNo">269</span>        public ControlledWorkerScheduler&lt;BindingSet&gt; getUnionScheduler() {<a name="line.269"></a>
<span class="sourceLineNo">270</span>                return unionScheduler;<a name="line.270"></a>
<span class="sourceLineNo">271</span>        }<a name="line.271"></a>
<span class="sourceLineNo">272</span>        <a name="line.272"></a>
<span class="sourceLineNo">273</span>        public FederationType getFederationType() {<a name="line.273"></a>
<span class="sourceLineNo">274</span>                return type;<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>        /**<a name="line.277"></a>
<span class="sourceLineNo">278</span>         * <a name="line.278"></a>
<span class="sourceLineNo">279</span>         * @return the singleton query manager<a name="line.279"></a>
<span class="sourceLineNo">280</span>         */<a name="line.280"></a>
<span class="sourceLineNo">281</span>        public QueryManager getQueryManager() {<a name="line.281"></a>
<span class="sourceLineNo">282</span>                // the singleton querymanager<a name="line.282"></a>
<span class="sourceLineNo">283</span>                return QueryManager.getInstance();<a name="line.283"></a>
<span class="sourceLineNo">284</span>        }<a name="line.284"></a>
<span class="sourceLineNo">285</span>        <a name="line.285"></a>
<span class="sourceLineNo">286</span>        <a name="line.286"></a>
<span class="sourceLineNo">287</span>        /**<a name="line.287"></a>
<span class="sourceLineNo">288</span>         * Add the specified endpoint to the federation. The endpoint must be initialized and<a name="line.288"></a>
<span class="sourceLineNo">289</span>         * the federation must not contain a member with the same endpoint location.<a name="line.289"></a>
<span class="sourceLineNo">290</span>         * <a name="line.290"></a>
<span class="sourceLineNo">291</span>         * @param e<a name="line.291"></a>
<span class="sourceLineNo">292</span>         *                      the initialized endpoint<a name="line.292"></a>
<span class="sourceLineNo">293</span>         * @param updateStrategy<a name="line.293"></a>
<span class="sourceLineNo">294</span>         *                      optional parameter, to determine if strategy is to be updated, default=true<a name="line.294"></a>
<span class="sourceLineNo">295</span>         * <a name="line.295"></a>
<span class="sourceLineNo">296</span>         * @throws FedXRuntimeException<a name="line.296"></a>
<span class="sourceLineNo">297</span>         *                       if the endpoint is not initialized, or if the federation has already a member with the<a name="line.297"></a>
<span class="sourceLineNo">298</span>         *           same location      <a name="line.298"></a>
<span class="sourceLineNo">299</span>         */<a name="line.299"></a>
<span class="sourceLineNo">300</span>        public void addEndpoint(Endpoint e, boolean ...updateStrategy) throws FedXRuntimeException {<a name="line.300"></a>
<span class="sourceLineNo">301</span>                log.info("Adding endpoint " + e.getId() + " to federation ...");<a name="line.301"></a>
<span class="sourceLineNo">302</span>                <a name="line.302"></a>
<span class="sourceLineNo">303</span>                /* check if endpoint is initialized*/<a name="line.303"></a>
<span class="sourceLineNo">304</span>                if (!e.isInitialized()) {<a name="line.304"></a>
<span class="sourceLineNo">305</span>                        try     {<a name="line.305"></a>
<span class="sourceLineNo">306</span>                                e.initialize();<a name="line.306"></a>
<span class="sourceLineNo">307</span>                        } catch (RepositoryException e1){<a name="line.307"></a>
<span class="sourceLineNo">308</span>                                throw new FedXRuntimeException("Provided endpoint was not initialized and could not be initialized: " + e1.getMessage(), e1);<a name="line.308"></a>
<span class="sourceLineNo">309</span>                        }<a name="line.309"></a>
<span class="sourceLineNo">310</span>                }<a name="line.310"></a>
<span class="sourceLineNo">311</span>                <a name="line.311"></a>
<span class="sourceLineNo">312</span>                /* check for duplicate before adding: heuristic =&gt; same location */<a name="line.312"></a>
<span class="sourceLineNo">313</span>                for (Endpoint member : federation.getMembers())<a name="line.313"></a>
<span class="sourceLineNo">314</span>                        if (member.getEndpoint().equals(e.getEndpoint()))<a name="line.314"></a>
<span class="sourceLineNo">315</span>                                throw new FedXRuntimeException("Adding failed: there exists already an endpoint with location " + e.getEndpoint() + " (eid=" + member.getId() + ")");<a name="line.315"></a>
<span class="sourceLineNo">316</span>        <a name="line.316"></a>
<span class="sourceLineNo">317</span>                federation.addMember(e);<a name="line.317"></a>
<span class="sourceLineNo">318</span>                EndpointManager.getEndpointManager().addEndpoint(e);<a name="line.318"></a>
<span class="sourceLineNo">319</span>                <a name="line.319"></a>
<span class="sourceLineNo">320</span>                if (updateStrategy==null || updateStrategy.length==0 || (updateStrategy.length==1 &amp;&amp; updateStrategy[0]==true))<a name="line.320"></a>
<span class="sourceLineNo">321</span>                        updateStrategy();<a name="line.321"></a>
<span class="sourceLineNo">322</span>        }<a name="line.322"></a>
<span class="sourceLineNo">323</span>        <a name="line.323"></a>
<span class="sourceLineNo">324</span>        /**<a name="line.324"></a>
<span class="sourceLineNo">325</span>         * Add the specified endpoints to the federation and take care for updating all structures.<a name="line.325"></a>
<span class="sourceLineNo">326</span>         * <a name="line.326"></a>
<span class="sourceLineNo">327</span>         * @param endpoints<a name="line.327"></a>
<span class="sourceLineNo">328</span>         *                              a list of initialized endpoints to add<a name="line.328"></a>
<span class="sourceLineNo">329</span>         */<a name="line.329"></a>
<span class="sourceLineNo">330</span>        public void addAll(List&lt;Endpoint&gt; endpoints) {<a name="line.330"></a>
<span class="sourceLineNo">331</span>                log.info("Adding " + endpoints.size() + " endpoints to the federation.");<a name="line.331"></a>
<span class="sourceLineNo">332</span>                <a name="line.332"></a>
<span class="sourceLineNo">333</span>                for (Endpoint e : endpoints) {<a name="line.333"></a>
<span class="sourceLineNo">334</span>                        addEndpoint(e, false);<a name="line.334"></a>
<span class="sourceLineNo">335</span>                }<a name="line.335"></a>
<span class="sourceLineNo">336</span>                <a name="line.336"></a>
<span class="sourceLineNo">337</span>                updateStrategy();<a name="line.337"></a>
<span class="sourceLineNo">338</span>        }<a name="line.338"></a>
<span class="sourceLineNo">339</span>        <a name="line.339"></a>
<span class="sourceLineNo">340</span>        /**<a name="line.340"></a>
<span class="sourceLineNo">341</span>         * Remove the specified endpoint from the federation.<a name="line.341"></a>
<span class="sourceLineNo">342</span>         * <a name="line.342"></a>
<span class="sourceLineNo">343</span>         * @param e<a name="line.343"></a>
<span class="sourceLineNo">344</span>         *                      the endpoint<a name="line.344"></a>
<span class="sourceLineNo">345</span>         * @param updateStrategy<a name="line.345"></a>
<span class="sourceLineNo">346</span>         *                      optional parameter, to determine if strategy is to be updated, default=true<a name="line.346"></a>
<span class="sourceLineNo">347</span>         */<a name="line.347"></a>
<span class="sourceLineNo">348</span>        public void removeEndpoint(Endpoint e, boolean ...updateStrategy) throws RepositoryException {<a name="line.348"></a>
<span class="sourceLineNo">349</span>                log.info("Removing endpoint " + e.getId() + " from federation ...");<a name="line.349"></a>
<span class="sourceLineNo">350</span>                <a name="line.350"></a>
<span class="sourceLineNo">351</span>                /* check if e is a federation member */<a name="line.351"></a>
<span class="sourceLineNo">352</span>                if (!federation.getMembers().contains(e))<a name="line.352"></a>
<span class="sourceLineNo">353</span>                        throw new FedXRuntimeException("Endpoint " + e.getId() + " is not a member of the current federation.");<a name="line.353"></a>
<span class="sourceLineNo">354</span>                <a name="line.354"></a>
<span class="sourceLineNo">355</span>                federation.removeMember(e);<a name="line.355"></a>
<span class="sourceLineNo">356</span>                EndpointManager.getEndpointManager().removeEndpoint(e);<a name="line.356"></a>
<span class="sourceLineNo">357</span>                e.shutDown();<a name="line.357"></a>
<span class="sourceLineNo">358</span>                <a name="line.358"></a>
<span class="sourceLineNo">359</span>                if (updateStrategy==null || updateStrategy.length==0 || (updateStrategy.length==1 &amp;&amp; updateStrategy[0]==true))<a name="line.359"></a>
<span class="sourceLineNo">360</span>                        updateStrategy();<a name="line.360"></a>
<span class="sourceLineNo">361</span>        }<a name="line.361"></a>
<span class="sourceLineNo">362</span>        <a name="line.362"></a>
<span class="sourceLineNo">363</span>        /**<a name="line.363"></a>
<span class="sourceLineNo">364</span>         * Remove all endpoints from the federation, e.g. to load a new preset. Repositories<a name="line.364"></a>
<span class="sourceLineNo">365</span>         * of the endpoints are shutDown, and the EndpointManager is added accordingly.<a name="line.365"></a>
<span class="sourceLineNo">366</span>         * <a name="line.366"></a>
<span class="sourceLineNo">367</span>         * @throws RepositoryException<a name="line.367"></a>
<span class="sourceLineNo">368</span>         */<a name="line.368"></a>
<span class="sourceLineNo">369</span>        public void removeAll() throws RepositoryException {<a name="line.369"></a>
<span class="sourceLineNo">370</span>                log.info("Removing all endpoints from federation.");<a name="line.370"></a>
<span class="sourceLineNo">371</span>                <a name="line.371"></a>
<span class="sourceLineNo">372</span>                for (Endpoint e : new ArrayList&lt;Endpoint&gt;(federation.getMembers())) {<a name="line.372"></a>
<span class="sourceLineNo">373</span>                        removeEndpoint(e, false);<a name="line.373"></a>
<span class="sourceLineNo">374</span>                }<a name="line.374"></a>
<span class="sourceLineNo">375</span>                <a name="line.375"></a>
<span class="sourceLineNo">376</span>                updateStrategy();<a name="line.376"></a>
<span class="sourceLineNo">377</span>        }<a name="line.377"></a>
<span class="sourceLineNo">378</span>        <a name="line.378"></a>
<span class="sourceLineNo">379</span>        /**<a name="line.379"></a>
<span class="sourceLineNo">380</span>         * return the number of triples in the federation as string. Retrieving<a name="line.380"></a>
<span class="sourceLineNo">381</span>         * the size is only supported {@link EndpointType#NativeStore} and<a name="line.381"></a>
<span class="sourceLineNo">382</span>         * {@link EndpointType#RemoteRepository}.<a name="line.382"></a>
<span class="sourceLineNo">383</span>         * <a name="line.383"></a>
<span class="sourceLineNo">384</span>         * If the federation contains other types of endpoints, the size is<a name="line.384"></a>
<span class="sourceLineNo">385</span>         * indicated as a lower bound, i.e. the string starts with a <a name="line.385"></a>
<span class="sourceLineNo">386</span>         * larger sign.<a name="line.386"></a>
<span class="sourceLineNo">387</span>         * @return<a name="line.387"></a>
<span class="sourceLineNo">388</span>         */<a name="line.388"></a>
<span class="sourceLineNo">389</span>        public String getFederationSize() {<a name="line.389"></a>
<span class="sourceLineNo">390</span>                long size = 0;<a name="line.390"></a>
<span class="sourceLineNo">391</span>                boolean isLowerBound = false;<a name="line.391"></a>
<span class="sourceLineNo">392</span>                for (Endpoint e : getFederation().getMembers())<a name="line.392"></a>
<span class="sourceLineNo">393</span>                        try     {<a name="line.393"></a>
<span class="sourceLineNo">394</span>                                size += e.size();<a name="line.394"></a>
<span class="sourceLineNo">395</span>                        } catch (RepositoryException e1) {<a name="line.395"></a>
<span class="sourceLineNo">396</span>                                isLowerBound = true;<a name="line.396"></a>
<span class="sourceLineNo">397</span>                        }<a name="line.397"></a>
<span class="sourceLineNo">398</span>                return isLowerBound ? "&gt;" + size : Long.toString(size);<a name="line.398"></a>
<span class="sourceLineNo">399</span>        }<a name="line.399"></a>
<span class="sourceLineNo">400</span>        <a name="line.400"></a>
<span class="sourceLineNo">401</span>        /**<a name="line.401"></a>
<span class="sourceLineNo">402</span>         * Shutdown the federation including the following operations: &lt;p&gt;<a name="line.402"></a>
<span class="sourceLineNo">403</span>         * <a name="line.403"></a>
<span class="sourceLineNo">404</span>         * &lt;ul&gt;<a name="line.404"></a>
<span class="sourceLineNo">405</span>         *  &lt;li&gt;shut down repositories of all federation members&lt;/li&gt;<a name="line.405"></a>
<span class="sourceLineNo">406</span>         *  &lt;li&gt;persist the cached information&lt;/li&gt;<a name="line.406"></a>
<span class="sourceLineNo">407</span>         *  &lt;li&gt;clear the endpoint manager&lt;/li&gt;<a name="line.407"></a>
<span class="sourceLineNo">408</span>         * &lt;/ul&gt;<a name="line.408"></a>
<span class="sourceLineNo">409</span>         * <a name="line.409"></a>
<span class="sourceLineNo">410</span>         * @throws FedXException<a name="line.410"></a>
<span class="sourceLineNo">411</span>         *                              if an error occurs while shutting down the federation<a name="line.411"></a>
<span class="sourceLineNo">412</span>         */<a name="line.412"></a>
<span class="sourceLineNo">413</span>        public void shutDown() throws FedXException {<a name="line.413"></a>
<span class="sourceLineNo">414</span>                log.info("Shutting down federation and all underlying repositories ...");<a name="line.414"></a>
<span class="sourceLineNo">415</span>                // Abort all running queries<a name="line.415"></a>
<span class="sourceLineNo">416</span>                federation.shutDownInternal();<a name="line.416"></a>
<span class="sourceLineNo">417</span>                cache.persist();<a name="line.417"></a>
<span class="sourceLineNo">418</span>                Config.reset();<a name="line.418"></a>
<span class="sourceLineNo">419</span>                EndpointManager.getEndpointManager().shutDown();<a name="line.419"></a>
<span class="sourceLineNo">420</span>                instance = null;<a name="line.420"></a>
<span class="sourceLineNo">421</span>                monitoring = null;<a name="line.421"></a>
<span class="sourceLineNo">422</span>        }<a name="line.422"></a>
<span class="sourceLineNo">423</span>        <a name="line.423"></a>
<span class="sourceLineNo">424</span>        /**<a name="line.424"></a>
<span class="sourceLineNo">425</span>         * Create an appropriate worker union for this federation, i.e. a synchronous<a name="line.425"></a>
<span class="sourceLineNo">426</span>         * worker union for local federations and a multithreaded worker union<a name="line.426"></a>
<span class="sourceLineNo">427</span>         * for remote &amp; hybrid federations.<a name="line.427"></a>
<span class="sourceLineNo">428</span>         * <a name="line.428"></a>
<span class="sourceLineNo">429</span>         * @return<a name="line.429"></a>
<span class="sourceLineNo">430</span>         * <a name="line.430"></a>
<span class="sourceLineNo">431</span>         * @see ControlledWorkerUnion<a name="line.431"></a>
<span class="sourceLineNo">432</span>         * @see SynchronousWorkerUnion<a name="line.432"></a>
<span class="sourceLineNo">433</span>         */<a name="line.433"></a>
<span class="sourceLineNo">434</span>        public WorkerUnionBase&lt;BindingSet&gt; createWorkerUnion(QueryInfo queryInfo) {<a name="line.434"></a>
<span class="sourceLineNo">435</span>                if (type==FederationType.LOCAL)<a name="line.435"></a>
<span class="sourceLineNo">436</span>                        return new SynchronousWorkerUnion&lt;BindingSet&gt;(queryInfo);<a name="line.436"></a>
<span class="sourceLineNo">437</span>                return new ControlledWorkerUnion&lt;BindingSet&gt;(unionScheduler, queryInfo);<a name="line.437"></a>
<span class="sourceLineNo">438</span>                <a name="line.438"></a>
<span class="sourceLineNo">439</span>        }<a name="line.439"></a>
<span class="sourceLineNo">440</span>        <a name="line.440"></a>
<span class="sourceLineNo">441</span>        <a name="line.441"></a>
<span class="sourceLineNo">442</span>        /**<a name="line.442"></a>
<span class="sourceLineNo">443</span>         * Update the federation evaluation strategy using the classification of endpoints <a name="line.443"></a>
<span class="sourceLineNo">444</span>         * as provided by {@link Endpoint#getEndpointClassification()}:&lt;p&gt;<a name="line.444"></a>
<span class="sourceLineNo">445</span>         * <a name="line.445"></a>
<span class="sourceLineNo">446</span>         * Which strategy is applied depends on {@link EvaluationStrategyFactory}.<a name="line.446"></a>
<span class="sourceLineNo">447</span>         * <a name="line.447"></a>
<span class="sourceLineNo">448</span>         * Default strategies:<a name="line.448"></a>
<span class="sourceLineNo">449</span>         * &lt;ul&gt;<a name="line.449"></a>
<span class="sourceLineNo">450</span>         *  &lt;li&gt;local federation: {@link SailFederationEvalStrategy}&lt;/li&gt;<a name="line.450"></a>
<span class="sourceLineNo">451</span>         *  &lt;li&gt;endpoint federation: {@link SparqlFederationEvalStrategy}&lt;/li&gt;<a name="line.451"></a>
<span class="sourceLineNo">452</span>         *  &lt;li&gt;hybrid federation: {@link SparqlFederationEvalStrategy}&lt;/li&gt;<a name="line.452"></a>
<span class="sourceLineNo">453</span>         * &lt;/ul&gt;<a name="line.453"></a>
<span class="sourceLineNo">454</span>         * <a name="line.454"></a>
<span class="sourceLineNo">455</span>         */<a name="line.455"></a>
<span class="sourceLineNo">456</span>        protected void updateStrategy() {<a name="line.456"></a>
<span class="sourceLineNo">457</span>                <a name="line.457"></a>
<span class="sourceLineNo">458</span>                int localCount=0, remoteCount=0;<a name="line.458"></a>
<span class="sourceLineNo">459</span>                for (Endpoint e : federation.getMembers()) {                    <a name="line.459"></a>
<span class="sourceLineNo">460</span>                        if (e.getEndpointClassification()==EndpointClassification.Remote) <a name="line.460"></a>
<span class="sourceLineNo">461</span>                                remoteCount++;<a name="line.461"></a>
<span class="sourceLineNo">462</span>                        else <a name="line.462"></a>
<span class="sourceLineNo">463</span>                                localCount++;           <a name="line.463"></a>
<span class="sourceLineNo">464</span>                }       <a name="line.464"></a>
<span class="sourceLineNo">465</span>                <a name="line.465"></a>
<span class="sourceLineNo">466</span>                boolean updated=false;<a name="line.466"></a>
<span class="sourceLineNo">467</span>                if (remoteCount==0) {<a name="line.467"></a>
<span class="sourceLineNo">468</span>                        if (type!=FederationType.LOCAL) {<a name="line.468"></a>
<span class="sourceLineNo">469</span>                                type = FederationType.LOCAL;<a name="line.469"></a>
<span class="sourceLineNo">470</span>                                updated=true;<a name="line.470"></a>
<span class="sourceLineNo">471</span>                        }<a name="line.471"></a>
<span class="sourceLineNo">472</span>                } else if (localCount==0) {<a name="line.472"></a>
<span class="sourceLineNo">473</span>                        if (type!=FederationType.REMOTE) {<a name="line.473"></a>
<span class="sourceLineNo">474</span>                                type = FederationType.REMOTE;<a name="line.474"></a>
<span class="sourceLineNo">475</span>                                updated=true;<a name="line.475"></a>
<span class="sourceLineNo">476</span>                        }<a name="line.476"></a>
<span class="sourceLineNo">477</span>                } else {<a name="line.477"></a>
<span class="sourceLineNo">478</span>                        if (type!=FederationType.HYBRID) {<a name="line.478"></a>
<span class="sourceLineNo">479</span>                                type = FederationType.HYBRID;<a name="line.479"></a>
<span class="sourceLineNo">480</span>                                updated=true;<a name="line.480"></a>
<span class="sourceLineNo">481</span>                        }                       <a name="line.481"></a>
<span class="sourceLineNo">482</span>                }<a name="line.482"></a>
<span class="sourceLineNo">483</span>                <a name="line.483"></a>
<span class="sourceLineNo">484</span>                if (updated) {<a name="line.484"></a>
<span class="sourceLineNo">485</span>                        strategy = EvaluationStrategyFactory.getEvaluationStrategy(type);               <a name="line.485"></a>
<span class="sourceLineNo">486</span>                        log.info("Federation updated. Type: " + type + ", evaluation strategy is " + instance.strategy.getClass().getSimpleName());<a name="line.486"></a>
<span class="sourceLineNo">487</span>                }<a name="line.487"></a>
<span class="sourceLineNo">488</span>                <a name="line.488"></a>
<span class="sourceLineNo">489</span>        }<a name="line.489"></a>
<span class="sourceLineNo">490</span>        <a name="line.490"></a>
<span class="sourceLineNo">491</span>}<a name="line.491"></a>




























































</pre>
</div>
</body>
</html>
