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apache / logging-log4j-site / 9755b12b39efbc0142688f9b1a11ec68db89f97b / . / 2.13.0 / log4j-core / apidocs / src-html / org / apache / logging / log4j / core / script / ScriptManager.html
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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the license for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the license.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.logging.log4j.core.script;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.io.File;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.Serializable;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.nio.file.Path;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.security.AccessController;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.security.PrivilegedAction;<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.Objects;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.ConcurrentMap;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>import javax.script.Bindings;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import javax.script.Compilable;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import javax.script.CompiledScript;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import javax.script.ScriptEngine;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import javax.script.ScriptEngineFactory;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import javax.script.ScriptEngineManager;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import javax.script.ScriptException;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import javax.script.SimpleBindings;<a name="line.36"></a>
<span class="sourceLineNo">037</span><a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.logging.log4j.Logger;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.logging.log4j.core.config.Configuration;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.logging.log4j.core.util.FileWatcher;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.logging.log4j.core.util.WatchManager;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.logging.log4j.status.StatusLogger;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.logging.log4j.util.Strings;<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> * Manages the scripts use by the Configuration.<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span>public class ScriptManager implements FileWatcher, Serializable {<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span> private abstract class AbstractScriptRunner implements ScriptRunner {<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> private static final String KEY_STATUS_LOGGER = "statusLogger";<a name="line.52"></a>
<span class="sourceLineNo">053</span> private static final String KEY_CONFIGURATION = "configuration";<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 Bindings createBindings() {<a name="line.56"></a>
<span class="sourceLineNo">057</span> final SimpleBindings bindings = new SimpleBindings();<a name="line.57"></a>
<span class="sourceLineNo">058</span> bindings.put(KEY_CONFIGURATION, configuration);<a name="line.58"></a>
<span class="sourceLineNo">059</span> bindings.put(KEY_STATUS_LOGGER, logger);<a name="line.59"></a>
<span class="sourceLineNo">060</span> return bindings;<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> }<a name="line.63"></a>
<span class="sourceLineNo">064</span><a name="line.64"></a>
<span class="sourceLineNo">065</span> private static final long serialVersionUID = -2534169384971965196L;<a name="line.65"></a>
<span class="sourceLineNo">066</span> private static final String KEY_THREADING = "THREADING";<a name="line.66"></a>
<span class="sourceLineNo">067</span> private static final Logger logger = StatusLogger.getLogger();<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span> private final Configuration configuration;<a name="line.69"></a>
<span class="sourceLineNo">070</span> private final ScriptEngineManager manager = new ScriptEngineManager();<a name="line.70"></a>
<span class="sourceLineNo">071</span> private final ConcurrentMap&lt;String, ScriptRunner&gt; scriptRunners = new ConcurrentHashMap&lt;&gt;();<a name="line.71"></a>
<span class="sourceLineNo">072</span> private final String languages;<a name="line.72"></a>
<span class="sourceLineNo">073</span> private final WatchManager watchManager;<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> public ScriptManager(final Configuration configuration, final WatchManager watchManager) {<a name="line.75"></a>
<span class="sourceLineNo">076</span> this.configuration = configuration;<a name="line.76"></a>
<span class="sourceLineNo">077</span> this.watchManager = watchManager;<a name="line.77"></a>
<span class="sourceLineNo">078</span> final List&lt;ScriptEngineFactory&gt; factories = manager.getEngineFactories();<a name="line.78"></a>
<span class="sourceLineNo">079</span> if (logger.isDebugEnabled()) {<a name="line.79"></a>
<span class="sourceLineNo">080</span> final StringBuilder sb = new StringBuilder();<a name="line.80"></a>
<span class="sourceLineNo">081</span> final int factorySize = factories.size();<a name="line.81"></a>
<span class="sourceLineNo">082</span> logger.debug("Installed {} script engine{}", factorySize, factorySize != 1 ? "s" : Strings.EMPTY);<a name="line.82"></a>
<span class="sourceLineNo">083</span> for (final ScriptEngineFactory factory : factories) {<a name="line.83"></a>
<span class="sourceLineNo">084</span> String threading = Objects.toString(factory.getParameter(KEY_THREADING), null);<a name="line.84"></a>
<span class="sourceLineNo">085</span> if (threading == null) {<a name="line.85"></a>
<span class="sourceLineNo">086</span> threading = "Not Thread Safe";<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span> final StringBuilder names = new StringBuilder();<a name="line.88"></a>
<span class="sourceLineNo">089</span> final List&lt;String&gt; languageNames = factory.getNames();<a name="line.89"></a>
<span class="sourceLineNo">090</span> for (final String name : languageNames) {<a name="line.90"></a>
<span class="sourceLineNo">091</span> if (names.length() &gt; 0) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> names.append(", ");<a name="line.92"></a>
<span class="sourceLineNo">093</span> }<a name="line.93"></a>
<span class="sourceLineNo">094</span> names.append(name);<a name="line.94"></a>
<span class="sourceLineNo">095</span> }<a name="line.95"></a>
<span class="sourceLineNo">096</span> if (sb.length() &gt; 0) {<a name="line.96"></a>
<span class="sourceLineNo">097</span> sb.append(", ");<a name="line.97"></a>
<span class="sourceLineNo">098</span> }<a name="line.98"></a>
<span class="sourceLineNo">099</span> sb.append(names);<a name="line.99"></a>
<span class="sourceLineNo">100</span> final boolean compiled = factory.getScriptEngine() instanceof Compilable;<a name="line.100"></a>
<span class="sourceLineNo">101</span> logger.debug("{} version: {}, language: {}, threading: {}, compile: {}, names: {}, factory class: {}",<a name="line.101"></a>
<span class="sourceLineNo">102</span> factory.getEngineName(), factory.getEngineVersion(), factory.getLanguageName(), threading,<a name="line.102"></a>
<span class="sourceLineNo">103</span> compiled, languageNames, factory.getClass().getName());<a name="line.103"></a>
<span class="sourceLineNo">104</span> }<a name="line.104"></a>
<span class="sourceLineNo">105</span> languages = sb.toString();<a name="line.105"></a>
<span class="sourceLineNo">106</span> } else {<a name="line.106"></a>
<span class="sourceLineNo">107</span> final StringBuilder names = new StringBuilder();<a name="line.107"></a>
<span class="sourceLineNo">108</span> for (final ScriptEngineFactory factory : factories) {<a name="line.108"></a>
<span class="sourceLineNo">109</span> for (final String name : factory.getNames()) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> if (names.length() &gt; 0) {<a name="line.110"></a>
<span class="sourceLineNo">111</span> names.append(", ");<a name="line.111"></a>
<span class="sourceLineNo">112</span> }<a name="line.112"></a>
<span class="sourceLineNo">113</span> names.append(name);<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> languages = names.toString();<a name="line.116"></a>
<span class="sourceLineNo">117</span> }<a name="line.117"></a>
<span class="sourceLineNo">118</span> }<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span> public void addScript(final AbstractScript script) {<a name="line.120"></a>
<span class="sourceLineNo">121</span> final ScriptEngine engine = manager.getEngineByName(script.getLanguage());<a name="line.121"></a>
<span class="sourceLineNo">122</span> if (engine == null) {<a name="line.122"></a>
<span class="sourceLineNo">123</span> logger.error("No ScriptEngine found for language " + script.getLanguage() + ". Available languages are: "<a name="line.123"></a>
<span class="sourceLineNo">124</span> + languages);<a name="line.124"></a>
<span class="sourceLineNo">125</span> return;<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span> if (engine.getFactory().getParameter(KEY_THREADING) == null) {<a name="line.127"></a>
<span class="sourceLineNo">128</span> scriptRunners.put(script.getName(), new ThreadLocalScriptRunner(script));<a name="line.128"></a>
<span class="sourceLineNo">129</span> } else {<a name="line.129"></a>
<span class="sourceLineNo">130</span> scriptRunners.put(script.getName(), new MainScriptRunner(engine, script));<a name="line.130"></a>
<span class="sourceLineNo">131</span> }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span> if (script instanceof ScriptFile) {<a name="line.133"></a>
<span class="sourceLineNo">134</span> final ScriptFile scriptFile = (ScriptFile) script;<a name="line.134"></a>
<span class="sourceLineNo">135</span> final Path path = scriptFile.getPath();<a name="line.135"></a>
<span class="sourceLineNo">136</span> if (scriptFile.isWatched() &amp;&amp; path != null) {<a name="line.136"></a>
<span class="sourceLineNo">137</span> watchManager.watchFile(path.toFile(), this);<a name="line.137"></a>
<span class="sourceLineNo">138</span> }<a name="line.138"></a>
<span class="sourceLineNo">139</span> }<a name="line.139"></a>
<span class="sourceLineNo">140</span> }<a name="line.140"></a>
<span class="sourceLineNo">141</span><a name="line.141"></a>
<span class="sourceLineNo">142</span> public Bindings createBindings(final AbstractScript script) {<a name="line.142"></a>
<span class="sourceLineNo">143</span> return getScriptRunner(script).createBindings();<a name="line.143"></a>
<span class="sourceLineNo">144</span> }<a name="line.144"></a>
<span class="sourceLineNo">145</span><a name="line.145"></a>
<span class="sourceLineNo">146</span> public AbstractScript getScript(final String name) {<a name="line.146"></a>
<span class="sourceLineNo">147</span> final ScriptRunner runner = scriptRunners.get(name);<a name="line.147"></a>
<span class="sourceLineNo">148</span> return runner != null ? runner.getScript() : null;<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span> @Override<a name="line.151"></a>
<span class="sourceLineNo">152</span> public void fileModified(final File file) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> final ScriptRunner runner = scriptRunners.get(file.toString());<a name="line.153"></a>
<span class="sourceLineNo">154</span> if (runner == null) {<a name="line.154"></a>
<span class="sourceLineNo">155</span> logger.info("{} is not a running script");<a name="line.155"></a>
<span class="sourceLineNo">156</span> return;<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> final ScriptEngine engine = runner.getScriptEngine();<a name="line.158"></a>
<span class="sourceLineNo">159</span> final AbstractScript script = runner.getScript();<a name="line.159"></a>
<span class="sourceLineNo">160</span> if (engine.getFactory().getParameter(KEY_THREADING) == null) {<a name="line.160"></a>
<span class="sourceLineNo">161</span> scriptRunners.put(script.getName(), new ThreadLocalScriptRunner(script));<a name="line.161"></a>
<span class="sourceLineNo">162</span> } else {<a name="line.162"></a>
<span class="sourceLineNo">163</span> scriptRunners.put(script.getName(), new MainScriptRunner(engine, script));<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> }<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span> public Object execute(final String name, final Bindings bindings) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> final ScriptRunner scriptRunner = scriptRunners.get(name);<a name="line.169"></a>
<span class="sourceLineNo">170</span> if (scriptRunner == null) {<a name="line.170"></a>
<span class="sourceLineNo">171</span> logger.warn("No script named {} could be found");<a name="line.171"></a>
<span class="sourceLineNo">172</span> return null;<a name="line.172"></a>
<span class="sourceLineNo">173</span> }<a name="line.173"></a>
<span class="sourceLineNo">174</span> return AccessController.doPrivileged(new PrivilegedAction&lt;Object&gt;() {<a name="line.174"></a>
<span class="sourceLineNo">175</span> @Override<a name="line.175"></a>
<span class="sourceLineNo">176</span> public Object run() {<a name="line.176"></a>
<span class="sourceLineNo">177</span> return scriptRunner.execute(bindings);<a name="line.177"></a>
<span class="sourceLineNo">178</span> }<a name="line.178"></a>
<span class="sourceLineNo">179</span> });<a name="line.179"></a>
<span class="sourceLineNo">180</span> }<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span> private interface ScriptRunner {<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span> Bindings createBindings();<a name="line.184"></a>
<span class="sourceLineNo">185</span><a name="line.185"></a>
<span class="sourceLineNo">186</span> Object execute(Bindings bindings);<a name="line.186"></a>
<span class="sourceLineNo">187</span><a name="line.187"></a>
<span class="sourceLineNo">188</span> AbstractScript getScript();<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span> ScriptEngine getScriptEngine();<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 class MainScriptRunner extends AbstractScriptRunner {<a name="line.193"></a>
<span class="sourceLineNo">194</span> private final AbstractScript script;<a name="line.194"></a>
<span class="sourceLineNo">195</span> private final CompiledScript compiledScript;<a name="line.195"></a>
<span class="sourceLineNo">196</span> private final ScriptEngine scriptEngine;<a name="line.196"></a>
<span class="sourceLineNo">197</span><a name="line.197"></a>
<span class="sourceLineNo">198</span> public MainScriptRunner(final ScriptEngine scriptEngine, final AbstractScript script) {<a name="line.198"></a>
<span class="sourceLineNo">199</span> this.script = script;<a name="line.199"></a>
<span class="sourceLineNo">200</span> this.scriptEngine = scriptEngine;<a name="line.200"></a>
<span class="sourceLineNo">201</span> CompiledScript compiled = null;<a name="line.201"></a>
<span class="sourceLineNo">202</span> if (scriptEngine instanceof Compilable) {<a name="line.202"></a>
<span class="sourceLineNo">203</span> logger.debug("Script {} is compilable", script.getName());<a name="line.203"></a>
<span class="sourceLineNo">204</span> compiled = AccessController.doPrivileged(new PrivilegedAction&lt;CompiledScript&gt;() {<a name="line.204"></a>
<span class="sourceLineNo">205</span> @Override<a name="line.205"></a>
<span class="sourceLineNo">206</span> public CompiledScript run() {<a name="line.206"></a>
<span class="sourceLineNo">207</span> try {<a name="line.207"></a>
<span class="sourceLineNo">208</span> return ((Compilable) scriptEngine).compile(script.getScriptText());<a name="line.208"></a>
<span class="sourceLineNo">209</span> } catch (final Throwable ex) {<a name="line.209"></a>
<span class="sourceLineNo">210</span> /*<a name="line.210"></a>
<span class="sourceLineNo">211</span> * ScriptException is what really should be caught here. However, beanshell's ScriptEngine<a name="line.211"></a>
<span class="sourceLineNo">212</span> * implements Compilable but then throws Error when the compile method is called!<a name="line.212"></a>
<span class="sourceLineNo">213</span> */<a name="line.213"></a>
<span class="sourceLineNo">214</span> logger.warn("Error compiling script", ex);<a name="line.214"></a>
<span class="sourceLineNo">215</span> return null;<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> });<a name="line.218"></a>
<span class="sourceLineNo">219</span> }<a name="line.219"></a>
<span class="sourceLineNo">220</span> compiledScript = compiled;<a name="line.220"></a>
<span class="sourceLineNo">221</span> }<a name="line.221"></a>
<span class="sourceLineNo">222</span><a name="line.222"></a>
<span class="sourceLineNo">223</span> @Override<a name="line.223"></a>
<span class="sourceLineNo">224</span> public ScriptEngine getScriptEngine() {<a name="line.224"></a>
<span class="sourceLineNo">225</span> return this.scriptEngine;<a name="line.225"></a>
<span class="sourceLineNo">226</span> }<a name="line.226"></a>
<span class="sourceLineNo">227</span><a name="line.227"></a>
<span class="sourceLineNo">228</span> @Override<a name="line.228"></a>
<span class="sourceLineNo">229</span> public Object execute(final Bindings bindings) {<a name="line.229"></a>
<span class="sourceLineNo">230</span> if (compiledScript != null) {<a name="line.230"></a>
<span class="sourceLineNo">231</span> try {<a name="line.231"></a>
<span class="sourceLineNo">232</span> return compiledScript.eval(bindings);<a name="line.232"></a>
<span class="sourceLineNo">233</span> } catch (final ScriptException ex) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> logger.error("Error running script " + script.getName(), ex);<a name="line.234"></a>
<span class="sourceLineNo">235</span> return null;<a name="line.235"></a>
<span class="sourceLineNo">236</span> }<a name="line.236"></a>
<span class="sourceLineNo">237</span> }<a name="line.237"></a>
<span class="sourceLineNo">238</span> try {<a name="line.238"></a>
<span class="sourceLineNo">239</span> return scriptEngine.eval(script.getScriptText(), bindings);<a name="line.239"></a>
<span class="sourceLineNo">240</span> } catch (final ScriptException ex) {<a name="line.240"></a>
<span class="sourceLineNo">241</span> logger.error("Error running script " + script.getName(), ex);<a name="line.241"></a>
<span class="sourceLineNo">242</span> return null;<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><a name="line.245"></a>
<span class="sourceLineNo">246</span> @Override<a name="line.246"></a>
<span class="sourceLineNo">247</span> public AbstractScript getScript() {<a name="line.247"></a>
<span class="sourceLineNo">248</span> return script;<a name="line.248"></a>
<span class="sourceLineNo">249</span> }<a name="line.249"></a>
<span class="sourceLineNo">250</span> }<a name="line.250"></a>
<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span> private class ThreadLocalScriptRunner extends AbstractScriptRunner {<a name="line.252"></a>
<span class="sourceLineNo">253</span> private final AbstractScript script;<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span> private final ThreadLocal&lt;MainScriptRunner&gt; runners = new ThreadLocal&lt;MainScriptRunner&gt;() {<a name="line.255"></a>
<span class="sourceLineNo">256</span> @Override<a name="line.256"></a>
<span class="sourceLineNo">257</span> protected MainScriptRunner initialValue() {<a name="line.257"></a>
<span class="sourceLineNo">258</span> final ScriptEngine engine = manager.getEngineByName(script.getLanguage());<a name="line.258"></a>
<span class="sourceLineNo">259</span> return new MainScriptRunner(engine, script);<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><a name="line.262"></a>
<span class="sourceLineNo">263</span> public ThreadLocalScriptRunner(final AbstractScript script) {<a name="line.263"></a>
<span class="sourceLineNo">264</span> this.script = script;<a name="line.264"></a>
<span class="sourceLineNo">265</span> }<a name="line.265"></a>
<span class="sourceLineNo">266</span><a name="line.266"></a>
<span class="sourceLineNo">267</span> @Override<a name="line.267"></a>
<span class="sourceLineNo">268</span> public Object execute(final Bindings bindings) {<a name="line.268"></a>
<span class="sourceLineNo">269</span> return runners.get().execute(bindings);<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> @Override<a name="line.272"></a>
<span class="sourceLineNo">273</span> public AbstractScript getScript() {<a name="line.273"></a>
<span class="sourceLineNo">274</span> return script;<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> @Override<a name="line.277"></a>
<span class="sourceLineNo">278</span> public ScriptEngine getScriptEngine() {<a name="line.278"></a>
<span class="sourceLineNo">279</span> return runners.get().getScriptEngine();<a name="line.279"></a>
<span class="sourceLineNo">280</span> }<a name="line.280"></a>
<span class="sourceLineNo">281</span> }<a name="line.281"></a>
<span class="sourceLineNo">282</span><a name="line.282"></a>
<span class="sourceLineNo">283</span> private ScriptRunner getScriptRunner(final AbstractScript script) {<a name="line.283"></a>
<span class="sourceLineNo">284</span> return scriptRunners.get(script.getName());<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>
</pre>
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